List of works - Luca Casagrande

3D maps of the local ISM from inversion of individual color excess measurements

scientific article published in January 2014

A New Identity Card for the Bulge Globular Cluster NGC 6440 from Resolved Star Counts*

scientific article published in June 2021

Absolute Calibration. III. Improved Absolute Calibration for the Visible through the Mid-infrared

scientific article published on 10 February 2023

Absolute magnitudes of seismic red clumps in the Kepler field and SAGA: the age dependency of the distance scale ⬇️

Accurate effective temperatures of the metal-poor benchmark stars HD 140283, HD 122563, and HD 103095 from CHARA interferometry

preprint

Accurate fundamental parameters for lower main-sequence stars

scientific article

Age dissection of the Milky Way discs: Red giants in the Kepler field

scientific article published in January 2021

Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology ⬇️

scientific article (publication date: 24 July 2015)

All sky photometric zero-points from stellar effective temperatures

scientific article published in August 2018

An absolutely calibrated T_eff_ scale from the infrared flux method. Dwarfs and subgiants

scientific article published in January 2010

An examination of recent transformations to the BV(RI)_C_ photometric system from the perspective of stellar models for old stars

scientific article published in January 2010

Asteroseismic Properties of Solar-type Stars Observed with the NASAK2Mission: Results from Campaigns 1–3 and Prospects for Future Observations ⬇️

scholarly article

Asteroseismic fundamental properties of solar-type stars observed by the NASA Kepler mission

scientific article

Asteroseismic inference on the spin-orbit misalignment and stellar parameters of HAT-P-7 ⬇️

scientific article published in Astronomy and Astrophysics

Asteroseismic masses of retired planet-hosting A-stars using SONG

article by Dennis Stello et al published 6 September 2017 in Monthly Notices of the Royal Astronomical Society

Asteroseismology of Solar-Type Stars withK2: Detection of Oscillations in C1 Data ⬇️

scientific article

Asteroseismology of the Hyades with K2: first detection of main-sequence solar-like oscillations in an open cluster ⬇️

article

Asteroseismology of the Multiplanet System K2-93

scientific article published on 25 November 2019

Atomic diffusion and mixing in old stars. VI. The lithium content of M30 ⬇️

scientific article published in January 2016

Bayesian analysis of ages, masses and distances to cool stars with non-LTE spectroscopic parameters

scientific article published in January 2013

Characteristics of the Two Sequences Seen in the High-velocity Hertzsprung–Russell Diagram in Gaia DR2

scientific article published on 6 August 2019

Characterization of 92 southern TESS candidate planet hosts and a new photometric [Fe/H] relation for cool dwarfs

scientific article published on 26 April 2021

Chemical abundances in the multiple sub-giant branch of 47 Tucanae: insights on its faint sub-giant branch component ⬇️

scholarly article

Chemo-dynamics and asteroseismic ages of seven metal-poor red giants from the Kepler field

scientific article published on 8 December 2021

Chromosome maps of globular clusters from wide-field ground-based photometry

scientific article published in November 2022

Clusters and groups of galaxies in the simulated local universe

scientific article

Confirming chemical clocks: asteroseismic age dissection of the Milky Way disk(s)

scientific article

Confirming known planetary trends using a photometrically selected Kepler sample

scientific article published on 21 December 2020

Connecting the Local Stellar Halo and Its Dark Matter Density to Dwarf Galaxies via Blue Stragglers

scientific article published in June 2020

Constructing a one-solar-mass evolutionary sequence using asteroseismic data from Kepler ⬇️

scholarly article

Cool and data-driven: an exploration of optical cool dwarf chemistry with both data-driven and physical models

scientific article published on 22 February 2024

Determining distances using asteroseismic methods

Differential population studies using asteroseismology: Solar-like oscillating giants in CoRoT fields LRc01 and LRa01

Discovery of extended main sequence turnoffs in Galactic open clusters ⬇️

scholarly article

Distances, extinctions, and stellar parameters for stars in SkyMapper DR3

scientific article published in 2021

Does SEGUE/SDSS indicate a dual galactic halo? ⬇️

scientific article published in the Astrophysical Journal

Erratum “Milky Way Tomography with the SkyMapper Southern Survey. II. Photometric Recalibration of SMSS DR2” (2021, ApJ, 907, 68)

scientific article published in January 2022

Erratum: “Characteristics of the Two Sequences seen in the High-velocity Hertzsprung–Russell diagram in Gaia DR2” (2019, ApJL, 881, L10)

scientific article published in March 2020

Erratum: “Standing on the Shoulders of Dwarfs: The Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters” (2017, ApJ, 835, 172)

scientific article published in the Astrophysical Journal

Fiducial stellar population sequences for the VJK_S_ photometric system

scientific article published in January 2010

First evidence of multiple populations along the AGB from Stromgren photometry

scientific article published in January 2017

Fundamental properties of stars using asteroseismology from Kepler and CoRoT and interferometry from the CHARA array ⬇️

scientific article published in the Astrophysical Journal

Fundamental stellar parameters of benchmark stars from CHARA interferometry

scientific article published in August 2020

Fundamental stellar properties from asteroseismology

GRACES observations of young [{alpha}/Fe]-rich stars ⬇️

scientific article published in January 2016

Gaia FGK benchmark stars: new candidates at low metallicities ⬇️

scientific article published in January 2016

Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars

scholarly article by Andrea Miglio published in December 2012

Globular and open clusters observed by SDSS/SEGUE: the giant stars ⬇️

article published in 2016

Helium enhanced stars and multiple populations along the horizontal branch of NGC 2808: direct spectroscopic measurements★

scientific article

High precision abundances of the old solar twin HIP 102152: insights on Li depletion from the oldest Sun ⬇️

scientific article

Impacts of a flaring star-forming disc and stellar radial mixing on the vertical metallicity gradient ⬇️

scientific article published in January 2017

Interferometric diameters of five evolved intermediate-mass planet-hosting stars measured with PAVO at the CHARA Array

scholarly article

Interstellar extinction curve variations towards the inner Milky Way: a challenge to observational cosmology ⬇️

scholarly article by Nataf D. M. et al published 2016 in Monthly Notices of the Royal Astronomical Society

Iron and s-elements abundance variations in NGC 5286: comparison with ‘anomalous' globular clusters and Milky Way satellites ⬇️

scientific article

M dwarfs: effective temperatures, radii and metallicities

scientific article

M giants with IGRINS

scientific article published on 30 June 2023

Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA ⬇️

scientific article

Milky Way Tomography with the SkyMapper Southern Survey. II. Photometric Recalibration of SMSS DR2

scientific article published on 29 January 2021

Models for metal-poor stars with different initial abundances of C, N, O, Mg, and Si. II. Application to the colour–magnitude diagrams of the globular clusters 47 Tuc, NGC 6362, M 5, M 3, M 55, and M92

scientific article published on 21 October 2021

Models of metal-poor stars with different initial abundances of C, N, O, Mg, and Si – I. Bolometric corrections derived from new MARCS synthetic spectra and their implications for observed colour–magnitude diagrams

scientific article published on 21 October 2021

NGC 6752 AGB stars revisited. I. Improved AGB temperatures remove apparent overionisation of Fe I

scientific article

New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s)

scientific article published in Astronomy and Astrophysics

New evidence of binarity in young α-rich turn-off and subgiant stars: fast rotation and strong magnetic activity

scientific article published on 23 April 2024

New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field

scientific article

Observational evidence for a broken Li spite plateau and mass-dependent Li depletion

article by Melendez J. et al published 2010 in Astronomy and Astrophysics

On the AGB stars of M 4: a robust disagreement between spectroscopic observations and theory

scholarly article

On the Color–Metallicity Relation of the Red Clump and the Reddening toward the Magellanic Clouds

scientific article published in April 2021

On the alleged duality of the Galactic halo

scientific article

On the use of Gaia magnitudes and new tables of bolometric corrections

scientific article published on 11 June 2018

Oscillating red giants observed during campaign 1 of the Kepler K2 mission: new prospects for galactic archaeology ⬇️

article

PLATO as it is : A legacy mission for Galactic archaeology

scholarly article by Andrea Miglio published in July 2017

Precision angular diameters for 16 southern stars with VLTI/PIONIER

scientific article published on 3 March 2020

Prospects for Galactic and stellar astrophysics with asteroseismology of giant stars in the TESS continuous viewing zones and beyond

scientific article

Red supergiant stars in NGC 4449, NGC 5055 (M63) and NGC 5457 (M101)

scientific article

Relative Ages of Nine Inner Milky Way Globular Clusters from Proper-motion-cleaned Color–Magnitude Diagrams*

scientific article published on 4 November 2021

Revisiting {Delta}Y/{Delta}Z from multiple main sequences in globular clusters: insight from nearby stars

scientific article

Seismic Evidence for a Rapidly Rotating Core in a Lower-Giant-Branch Star Observed with KEPLER ⬇️

scientific article published in the Astrophysical Journal

Seismic constraints on the radial dependence of the internal rotation profiles of six Kepler subgiants and young red giants ⬇️

scientific article published in Astronomy and Astrophysics

Selecting accreted populations: metallicity, elemental abundances, and ages of the Gaia -Sausage-Enceladus and Sequoia populations

scientific article published on 15 September 2021

Shell helium-burning hot subdwarf B stars as candidates for blue large-amplitude pulsators

scientific article published in December 2022

SkyMapper stellar parameters for Galactic Archaeology on a grand-scale

scholarly article by L Casagrande published in October 2018

Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes

scientific article published in Astronomy and Astrophysics

Spectroscopic parameters for 451 stars in the HARPS GTO planet search program: Stellar [Fe∕H] and the frequency of exo-Neptunes

Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters ⬇️

scientific article published in the Astrophysical Journal

Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. II. Radii, Masses, and Ages ⬇️

scientific article published in the Astrophysical Journal

Star Formation Timescales of the Halo Populations from Asteroseismology and Chemical Abundances*

scientific article published on 06 May 2021

Stellar ages and convective cores in field main-sequence stars: first asteroseismic application to two Kepler targets ⬇️

scientific article published in the Astrophysical Journal

Strömgren Survey for Asteroseismology and Galactic Archaeology: Let the Saga Begin ⬇️

scientific article published in the Astrophysical Journal

Synthetic Stellar Photometry – II. Testing the bolometric flux scale and tables of bolometric corrections for the Hipparcos/Tycho, Pan-STARRS1, SkyMapper, and JWST systems

scientific article

Synthetic stellar photometry – I. General considerations and new transformations for broad-band systems ⬇️

scientific article

Testing stellar evolution models with the retired A star HD 185351 ⬇️

scientific article

The BAyesian STellar algorithm (<tt>BASTA</tt>): a fitting tool for stellar studies, asteroseismology, exoplanets, and Galactic archaeology

scientific article published on 08 October 2021

The COMBS Survey - II. Distinguishing the metal-poor bulge from the halo interlopers

scientific article published on 6 January 2021

The COMBS survey – I. Chemical origins of metal-poor stars in the Galactic bulge

scientific article published on 8 July 2019

The EMBLA survey – metal-poor stars in the Galactic bulge ⬇️

scientific article

The GALAH Survey: lithium-strong KM dwarfs

scientific article

The GALAH Survey: second data release

scientific article

The GALAH survey: An abundance, age, and kinematic inventory of the solar neighbourhood made with TGAS

scientific article

The GALAH survey: accurate radial velocities and library of observed stellar template spectra

scientific article

The GALAH survey: effective temperature calibration from the InfraRed Flux Method in the Gaia system

scientific article published on 10 August 2021

The GALAH survey: observational overview andGaiaDR1 companion ⬇️

scientific article

The GALAH survey: properties of the Galactic disc(s) in the solar neighbourhood

scientific article

The GALAH survey: scientific motivation ⬇️

scholarly article

The GALAH survey: stellar streams and how stellar velocity distributions vary with Galactic longitude, hemisphere, and metallicity

scientific article

The GALAH survey: temporal chemical enrichment of the galactic disc

scientific article published on 12 November 2019

The GALAH+ survey: Third data release ⬇️

journal article from 'Monthly Notices of the Royal Astronomical Society' published in 2021

The Gaia -ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy

scientific article published in October 2022

The Gaia -ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products

scientific article published in October 2022

The Gaia-ESO Survey: the most metal-poor stars in the Galactic bulge ⬇️

scientific article

The HR 1614 moving group is not a dissolving cluster

scientific article published in June 2020

The K2 Galactic Archaeology Program Data Release 3: Age-abundance Patterns in C1–C8 and C10–C18

scientific article published on 24 February 2022

The K2 Galactic Caps Project – going beyond the Kepler field and ageing the Galactic disc

scientific article published on 4 November 2019

The K2 M67 study: revisiting old friends with K2 reveals oscillating red giants in the open cluster M67 ⬇️

scientific article published in the Astrophysical Journal

The Mira-based distance to the Galactic Center ⬇️

scientific article published in January 2018

The Pan-Pacific Planet Search. V. Fundamental parameters for 164 evolved stars ⬇️

scientific article published in Astronomical Journal

The Populations of Carina. I. Decoding the Color–Magnitude Diagram

article by John E. Norris et al published 23 June 2017 in The Astrophysical Journal Supplement Series

The Populations of Carina. II. Chemical Enrichment

scholarly article

The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in theGaiaEra

scientific article published in the Astrophysical Journal

The Radial Velocity Experiment (RAVE): fifth data release ⬇️

scholarly article

The SAPP pipeline for the determination of stellar abundances and atmospheric parameters of stars in the core program of the PLATO mission

scientific article published in February 2022

The STAGGER-grid: A grid of 3D stellar atmosphere models. V. Synthetic stellar spectra and broad-band photometry

scientific article published in January 2018

The Sixth Data Release of the Radial Velocity Experiment (RAVE). I. Survey Description, Spectra, and Radial Velocities

scientific article published on 27 July 2020

The SkyMapper-Gaia RVS view of the Gaia–Enceladus–Sausage – an investigation of the metallicity and mass of the Milky Way’s last major merger

scientific article published on 2 July 2020

The Solar Twin Planet Search II. A Jupiter twin around a solar twin ⬇️

scientific article

The Solar Twin Planet Search. I. Fundamental parameters of the stellar sample ⬇️

scientific article published in January 2014

The Solar Twin Planet Search. IV. The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars ⬇️

scientific article published in Astronomy and Astrophysics

The Solar Twin Planet Search. The age-chromospheric activity relation

scientific article published in January 2018

The Solar Twin Planet Search. V. Close-in, low-mass planet candidates and evidence of planet accretion in the solar twin HIP 68468 ⬇️

scientific article published in January 2017

The Stagger-grid: Synthetic stellar spectra and broad-band photometry

scientific article published in August 2018

The UBV(RI)_C_ colors of the Sun ⬇️

scientific article published in January 2012

The ages of 55 globular clusters as determined using an improved {Delta}V_TO_^HB^ method along with color-magnitude diagram constraints, and their implications for broader issues ⬇️

scientific article published in the Astrophysical Journal

The chemical homogeneity of Sun-like stars in the solar neighborhood ⬇️

scientific article published in January 2018

The dissimilar chemical composition of the planet-hosting stars of the XO-2 binary system ⬇️

scientific article

The helium abundance and ΔY/ΔZ in lower main-sequence stars

scientific article

The infrared colors of the Sun ⬇️

scientific article published in January 2012

The odd bunch: chrono-chemo-dynamics of sixteen unusual stars from Kepler

scientific article published on 8 May 2023

The relationship between photometric and spectroscopic oscillation amplitudes from 3D stellar atmosphere simulations

scientific article published in May 2021

The vertical metallicity gradients of mono-age stellar populations in the Milky Way thin disk

scientific article published in July 2017

Three-dimensional hydrodynamical simulations of red giant stars: semi-global models for interpreting interferometric observations

scientific article published in January 2010

Towards stellar effective temperatures and diameters at 1 per cent accuracy for future surveys ⬇️

scientific article

Two chemically similar stellar overdensities on opposite sides of the plane of the Galactic disk

scientific article published on 26 February 2018

Unveiling systematic biases in the 1D LTE excitation-ionization balance of Fe for FGK stars: a novel approach to determination of stellar parameters

scientific article published in January 2013

Verifying asteroseismically determined parameters of Kepler stars using Hipparcos parallaxes: self-consistent stellar properties and distances ⬇️

scientific article published in the Astrophysical Journal

uvby-{beta} photometry of solar twins. The solar colors, model atmospheres, and the T_eff_ and metallicity scales

scientific article published in January 2010

List of works by Luca Casagrande

3D maps of the local ISM from inversion of individual color excess measurements

A New Identity Card for the Bulge Globular Cluster NGC 6440 from Resolved Star Counts*

Absolute Calibration. III. Improved Absolute Calibration for the Visible through the Mid-infrared

Absolute magnitudes of seismic red clumps in the Kepler field and SAGA: the age dependency of the distance scale ⬇️

Accurate effective temperatures of the metal-poor benchmark stars HD 140283, HD 122563, and HD 103095 from CHARA interferometry

Accurate fundamental parameters for lower main-sequence stars

Age dissection of the Milky Way discs: Red giants in the Kepler field

Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology ⬇️

All sky photometric zero-points from stellar effective temperatures

An absolutely calibrated T_eff_ scale from the infrared flux method. Dwarfs and subgiants

An examination of recent transformations to the BV(RI)_C_ photometric system from the perspective of stellar models for old stars

Asteroseismic Properties of Solar-type Stars Observed with the NASAK2Mission: Results from Campaigns 1–3 and Prospects for Future Observations ⬇️

Asteroseismic fundamental properties of solar-type stars observed by the NASA Kepler mission

Asteroseismic inference on the spin-orbit misalignment and stellar parameters of HAT-P-7 ⬇️

Asteroseismic masses of retired planet-hosting A-stars using SONG

Asteroseismology of Solar-Type Stars withK2: Detection of Oscillations in C1 Data ⬇️

Asteroseismology of the Hyades with K2: first detection of main-sequence solar-like oscillations in an open cluster ⬇️

Asteroseismology of the Multiplanet System K2-93

Atomic diffusion and mixing in old stars. VI. The lithium content of M30 ⬇️

Bayesian analysis of ages, masses and distances to cool stars with non-LTE spectroscopic parameters

Characteristics of the Two Sequences Seen in the High-velocity Hertzsprung–Russell Diagram in Gaia DR2

Characterization of 92 southern TESS candidate planet hosts and a new photometric [Fe/H] relation for cool dwarfs

Chemical abundances in the multiple sub-giant branch of 47 Tucanae: insights on its faint sub-giant branch component ⬇️

Chemo-dynamics and asteroseismic ages of seven metal-poor red giants from the Kepler field

Chromosome maps of globular clusters from wide-field ground-based photometry

Clusters and groups of galaxies in the simulated local universe

Confirming chemical clocks: asteroseismic age dissection of the Milky Way disk(s)

Confirming known planetary trends using a photometrically selected Kepler sample

Connecting the Local Stellar Halo and Its Dark Matter Density to Dwarf Galaxies via Blue Stragglers

Constructing a one-solar-mass evolutionary sequence using asteroseismic data from Kepler ⬇️

Cool and data-driven: an exploration of optical cool dwarf chemistry with both data-driven and physical models

Determining distances using asteroseismic methods

Differential population studies using asteroseismology: Solar-like oscillating giants in CoRoT fields LRc01 and LRa01

Discovery of extended main sequence turnoffs in Galactic open clusters ⬇️

Distances, extinctions, and stellar parameters for stars in SkyMapper DR3

Does SEGUE/SDSS indicate a dual galactic halo? ⬇️

Erratum “Milky Way Tomography with the SkyMapper Southern Survey. II. Photometric Recalibration of SMSS DR2” (2021, ApJ, 907, 68)

Erratum: “Characteristics of the Two Sequences seen in the High-velocity Hertzsprung–Russell diagram in Gaia DR2” (2019, ApJL, 881, L10)

Erratum: “Standing on the Shoulders of Dwarfs: The Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters” (2017, ApJ, 835, 172)

Fiducial stellar population sequences for the VJK_S_ photometric system

First evidence of multiple populations along the AGB from Stromgren photometry

Fundamental properties of stars using asteroseismology from Kepler and CoRoT and interferometry from the CHARA array ⬇️

Fundamental stellar parameters of benchmark stars from CHARA interferometry

Fundamental stellar properties from asteroseismology

GRACES observations of young [{alpha}/Fe]-rich stars ⬇️

Gaia FGK benchmark stars: new candidates at low metallicities ⬇️

Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars

Globular and open clusters observed by SDSS/SEGUE: the giant stars ⬇️

Helium enhanced stars and multiple populations along the horizontal branch of NGC 2808: direct spectroscopic measurements★

High precision abundances of the old solar twin HIP 102152: insights on Li depletion from the oldest Sun ⬇️

Impacts of a flaring star-forming disc and stellar radial mixing on the vertical metallicity gradient ⬇️

Interferometric diameters of five evolved intermediate-mass planet-hosting stars measured with PAVO at the CHARA Array

Interstellar extinction curve variations towards the inner Milky Way: a challenge to observational cosmology ⬇️

Iron and s-elements abundance variations in NGC 5286: comparison with ‘anomalous' globular clusters and Milky Way satellites ⬇️

M dwarfs: effective temperatures, radii and metallicities

M giants with IGRINS

Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA ⬇️

Milky Way Tomography with the SkyMapper Southern Survey. II. Photometric Recalibration of SMSS DR2

Models for metal-poor stars with different initial abundances of C, N, O, Mg, and Si. II. Application to the colour–magnitude diagrams of the globular clusters 47 Tuc, NGC 6362, M 5, M 3, M 55, and M92

Models of metal-poor stars with different initial abundances of C, N, O, Mg, and Si – I. Bolometric corrections derived from new MARCS synthetic spectra and their implications for observed colour–magnitude diagrams

NGC 6752 AGB stars revisited. I. Improved AGB temperatures remove apparent overionisation of Fe I

New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s)

New evidence of binarity in young α-rich turn-off and subgiant stars: fast rotation and strong magnetic activity

New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field

Observational evidence for a broken Li spite plateau and mass-dependent Li depletion

On the AGB stars of M 4: a robust disagreement between spectroscopic observations and theory

On the Color–Metallicity Relation of the Red Clump and the Reddening toward the Magellanic Clouds

On the alleged duality of the Galactic halo

On the use of Gaia magnitudes and new tables of bolometric corrections

Oscillating red giants observed during campaign 1 of the Kepler K2 mission: new prospects for galactic archaeology ⬇️

PLATO as it is : A legacy mission for Galactic archaeology

Precision angular diameters for 16 southern stars with VLTI/PIONIER

Prospects for Galactic and stellar astrophysics with asteroseismology of giant stars in the TESS continuous viewing zones and beyond

Red supergiant stars in NGC 4449, NGC 5055 (M63) and NGC 5457 (M101)

Relative Ages of Nine Inner Milky Way Globular Clusters from Proper-motion-cleaned Color–Magnitude Diagrams*

Revisiting {Delta}Y/{Delta}Z from multiple main sequences in globular clusters: insight from nearby stars

Seismic Evidence for a Rapidly Rotating Core in a Lower-Giant-Branch Star Observed with KEPLER ⬇️

Seismic constraints on the radial dependence of the internal rotation profiles of six Kepler subgiants and young red giants ⬇️

Selecting accreted populations: metallicity, elemental abundances, and ages of the Gaia -Sausage-Enceladus and Sequoia populations