Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey

N. Grieves, J. Ge, N. Thomas, K. Willis, B. Ma, D. Lorenzo-Oliveira, A. B.A. Queiroz, L. Ghezzi, C. Chiappini, F. Anders, L. Dutra-Ferreira, G. F. Porto de Mello, B. X. Santiago, L. N. da Costa, R. L.C. Ogando, E. F. del Peloso, J. C. Tan, D. P. Schneider, J. Pepper, K. G. StassunB. Zhao, D. Bizyaev, K. Pan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Combining stellar atmospheric parameters, such as effective temperature, surface gravity, and metallicity, with barycentric radial velocity data provides insight into the chemo-dynamics of the MilkyWay and our local Galactic environment. We analyse 3075 stars with spectroscopic data from the Sloan Digital Sky Survey III MARVELS radial velocity survey and present atmospheric parameters for 2343 dwarf stars using the spectral indices method, a modified version of the equivalent width method. We present barycentric radial velocities for a sample of 2610 stars with a median uncertainty of 0.3 kms-1. We determine stellar ages using two independent methods and calculate ages for 2335 stars with a maximum-likelihood isochronal age-dating method and for 2194 stars with a Bayesian age-dating method. Using previously published parallax data, we compute Galactic orbits and space velocities for 2504 stars to explore stellar populations based on kinematic and age parameters. This study combines good ages and exquisite velocities to explore local chemo-kinematics of the Milky Way, which complements many of the recent studies of giant stars with the APOGEE survey, and we find our results to be in agreement with current chemo-dynamical models of the Milky Way. Particularly, we find from our metallicity distributions and velocity-age relations of a kinematically defined thin disc that the metal-rich end has stars of all ages, even after we clean the sample of highly eccentric stars, suggesting that radial migration plays a key role in the metallicity scatter of the thin disc. All stellar parameters and kinematic data derived in this work are catalogued and published online in machine-readable form.

Original languageEnglish (US)
Pages (from-to)3244-3265
Number of pages22
JournalMonthly Notices of the Royal Astronomical Society
Volume481
Issue number3
DOIs
StatePublished - Dec 11 2018

Fingerprint

kinematics
stars
radial velocity
metallicity
dating method
dating
dwarf stars
giant stars
parallax
eccentrics
index method
complement
surface temperature
gravitation
orbits
gravity
parameter
metal
metals

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Grieves, N., Ge, J., Thomas, N., Willis, K., Ma, B., Lorenzo-Oliveira, D., ... Pan, K. (2018). Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey. Monthly Notices of the Royal Astronomical Society, 481(3), 3244-3265. https://doi.org/10.1093/mnras/sty2431
Grieves, N. ; Ge, J. ; Thomas, N. ; Willis, K. ; Ma, B. ; Lorenzo-Oliveira, D. ; Queiroz, A. B.A. ; Ghezzi, L. ; Chiappini, C. ; Anders, F. ; Dutra-Ferreira, L. ; Porto de Mello, G. F. ; Santiago, B. X. ; da Costa, L. N. ; Ogando, R. L.C. ; del Peloso, E. F. ; Tan, J. C. ; Schneider, D. P. ; Pepper, J. ; Stassun, K. G. ; Zhao, B. ; Bizyaev, D. ; Pan, K. / Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey. In: Monthly Notices of the Royal Astronomical Society. 2018 ; Vol. 481, No. 3. pp. 3244-3265.
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title = "Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey",
abstract = "Combining stellar atmospheric parameters, such as effective temperature, surface gravity, and metallicity, with barycentric radial velocity data provides insight into the chemo-dynamics of the MilkyWay and our local Galactic environment. We analyse 3075 stars with spectroscopic data from the Sloan Digital Sky Survey III MARVELS radial velocity survey and present atmospheric parameters for 2343 dwarf stars using the spectral indices method, a modified version of the equivalent width method. We present barycentric radial velocities for a sample of 2610 stars with a median uncertainty of 0.3 kms-1. We determine stellar ages using two independent methods and calculate ages for 2335 stars with a maximum-likelihood isochronal age-dating method and for 2194 stars with a Bayesian age-dating method. Using previously published parallax data, we compute Galactic orbits and space velocities for 2504 stars to explore stellar populations based on kinematic and age parameters. This study combines good ages and exquisite velocities to explore local chemo-kinematics of the Milky Way, which complements many of the recent studies of giant stars with the APOGEE survey, and we find our results to be in agreement with current chemo-dynamical models of the Milky Way. Particularly, we find from our metallicity distributions and velocity-age relations of a kinematically defined thin disc that the metal-rich end has stars of all ages, even after we clean the sample of highly eccentric stars, suggesting that radial migration plays a key role in the metallicity scatter of the thin disc. All stellar parameters and kinematic data derived in this work are catalogued and published online in machine-readable form.",
author = "N. Grieves and J. Ge and N. Thomas and K. Willis and B. Ma and D. Lorenzo-Oliveira and Queiroz, {A. B.A.} and L. Ghezzi and C. Chiappini and F. Anders and L. Dutra-Ferreira and {Porto de Mello}, {G. F.} and Santiago, {B. X.} and {da Costa}, {L. N.} and Ogando, {R. L.C.} and {del Peloso}, {E. F.} and Tan, {J. C.} and Schneider, {D. P.} and J. Pepper and Stassun, {K. G.} and B. Zhao and D. Bizyaev and K. Pan",
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Grieves, N, Ge, J, Thomas, N, Willis, K, Ma, B, Lorenzo-Oliveira, D, Queiroz, ABA, Ghezzi, L, Chiappini, C, Anders, F, Dutra-Ferreira, L, Porto de Mello, GF, Santiago, BX, da Costa, LN, Ogando, RLC, del Peloso, EF, Tan, JC, Schneider, DP, Pepper, J, Stassun, KG, Zhao, B, Bizyaev, D & Pan, K 2018, 'Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey', Monthly Notices of the Royal Astronomical Society, vol. 481, no. 3, pp. 3244-3265. https://doi.org/10.1093/mnras/sty2431

Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey. / Grieves, N.; Ge, J.; Thomas, N.; Willis, K.; Ma, B.; Lorenzo-Oliveira, D.; Queiroz, A. B.A.; Ghezzi, L.; Chiappini, C.; Anders, F.; Dutra-Ferreira, L.; Porto de Mello, G. F.; Santiago, B. X.; da Costa, L. N.; Ogando, R. L.C.; del Peloso, E. F.; Tan, J. C.; Schneider, D. P.; Pepper, J.; Stassun, K. G.; Zhao, B.; Bizyaev, D.; Pan, K.

In: Monthly Notices of the Royal Astronomical Society, Vol. 481, No. 3, 11.12.2018, p. 3244-3265.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey

AU - Grieves, N.

AU - Ge, J.

AU - Thomas, N.

AU - Willis, K.

AU - Ma, B.

AU - Lorenzo-Oliveira, D.

AU - Queiroz, A. B.A.

AU - Ghezzi, L.

AU - Chiappini, C.

AU - Anders, F.

AU - Dutra-Ferreira, L.

AU - Porto de Mello, G. F.

AU - Santiago, B. X.

AU - da Costa, L. N.

AU - Ogando, R. L.C.

AU - del Peloso, E. F.

AU - Tan, J. C.

AU - Schneider, D. P.

AU - Pepper, J.

AU - Stassun, K. G.

AU - Zhao, B.

AU - Bizyaev, D.

AU - Pan, K.

PY - 2018/12/11

Y1 - 2018/12/11

N2 - Combining stellar atmospheric parameters, such as effective temperature, surface gravity, and metallicity, with barycentric radial velocity data provides insight into the chemo-dynamics of the MilkyWay and our local Galactic environment. We analyse 3075 stars with spectroscopic data from the Sloan Digital Sky Survey III MARVELS radial velocity survey and present atmospheric parameters for 2343 dwarf stars using the spectral indices method, a modified version of the equivalent width method. We present barycentric radial velocities for a sample of 2610 stars with a median uncertainty of 0.3 kms-1. We determine stellar ages using two independent methods and calculate ages for 2335 stars with a maximum-likelihood isochronal age-dating method and for 2194 stars with a Bayesian age-dating method. Using previously published parallax data, we compute Galactic orbits and space velocities for 2504 stars to explore stellar populations based on kinematic and age parameters. This study combines good ages and exquisite velocities to explore local chemo-kinematics of the Milky Way, which complements many of the recent studies of giant stars with the APOGEE survey, and we find our results to be in agreement with current chemo-dynamical models of the Milky Way. Particularly, we find from our metallicity distributions and velocity-age relations of a kinematically defined thin disc that the metal-rich end has stars of all ages, even after we clean the sample of highly eccentric stars, suggesting that radial migration plays a key role in the metallicity scatter of the thin disc. All stellar parameters and kinematic data derived in this work are catalogued and published online in machine-readable form.

AB - Combining stellar atmospheric parameters, such as effective temperature, surface gravity, and metallicity, with barycentric radial velocity data provides insight into the chemo-dynamics of the MilkyWay and our local Galactic environment. We analyse 3075 stars with spectroscopic data from the Sloan Digital Sky Survey III MARVELS radial velocity survey and present atmospheric parameters for 2343 dwarf stars using the spectral indices method, a modified version of the equivalent width method. We present barycentric radial velocities for a sample of 2610 stars with a median uncertainty of 0.3 kms-1. We determine stellar ages using two independent methods and calculate ages for 2335 stars with a maximum-likelihood isochronal age-dating method and for 2194 stars with a Bayesian age-dating method. Using previously published parallax data, we compute Galactic orbits and space velocities for 2504 stars to explore stellar populations based on kinematic and age parameters. This study combines good ages and exquisite velocities to explore local chemo-kinematics of the Milky Way, which complements many of the recent studies of giant stars with the APOGEE survey, and we find our results to be in agreement with current chemo-dynamical models of the Milky Way. Particularly, we find from our metallicity distributions and velocity-age relations of a kinematically defined thin disc that the metal-rich end has stars of all ages, even after we clean the sample of highly eccentric stars, suggesting that radial migration plays a key role in the metallicity scatter of the thin disc. All stellar parameters and kinematic data derived in this work are catalogued and published online in machine-readable form.

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U2 - 10.1093/mnras/sty2431

DO - 10.1093/mnras/sty2431

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Grieves N, Ge J, Thomas N, Willis K, Ma B, Lorenzo-Oliveira D et al. Chemo-kinematics of the Milky Way from the SDSS-III MARVELS survey. Monthly Notices of the Royal Astronomical Society. 2018 Dec 11;481(3):3244-3265. https://doi.org/10.1093/mnras/sty2431