Observational Properties of the Metal-poor Thick Disk of the Milky Way and Insights into its Origins

Gregory R. Ruchti; Jon P. Fulbright; Rosemary F. G. Wyse; Gerard F. Gilmore; Olivier Bienayme; Joss Bland-Hawthorn; Brad K. Gibson; Eva K. Grebel; Amina Helmi; Ulisse Munari; Julio F. Navarro; Quentin A. Parker; Warren Reid; George M. Seabroke; Arnaud Siebert; Alessandro Siviero; Matthias Steinmetz; Fred G. Watson; Mary Williams; Tomaz Zwitter

doi:10.1088/0004-637X/737/1/9

Observational Properties of the Metal-poor Thick Disk of the Milky Way and Insights into its Origins

Gregory R. Ruchti^*
, Jon P. Fulbright
, Rosemary F. G. Wyse
, Gerard F. Gilmore
, Olivier Bienayme
, Joss Bland-Hawthorn
, Brad K. Gibson
, Eva K. Grebel
, Amina Helmi
, Ulisse Munari
, Julio F. Navarro
, Quentin A. Parker
, Warren Reid
, George M. Seabroke
, Arnaud Siebert
, Alessandro Siviero
, Matthias Steinmetz
, Fred G. Watson
, Mary Williams
, Tomaz Zwitter

^*Corresponding author for this work

Kapteyn Astronomical Institute

Research output: Contribution to journal › Article › Academic › peer-review

99 Citations (Scopus)

Abstract

We have undertaken the study of the elemental abundances and kinematic properties of a metal-poor sample of candidate thick-disk stars selected from the Radial Velocity Experiment spectroscopic survey of bright stars to differentiate among the present scenarios of the formation of the thick disk. In this paper, we report on a sample of 214 red giant branch, 31 red clump/horizontal branch, and 74 main-sequence/sub-giant branch metal-poor stars, which serves to augment our previous sample of only giant stars. We find that the thick disk [α/Fe] ratios are enhanced and have little variation (

Original language	English
Article number	9
Pages (from-to)	1-24
Number of pages	24
Journal	Astrophysical Journal
Volume	737
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/737/1/9
Publication status	Published - 10-Aug-2011

Keywords

Galaxy: abundances
Galaxy: disk
stars: abundances
stars: late-type
GALACTIC CHEMICAL EVOLUTION
VELOCITY EXPERIMENT RAVE
DARK-MATTER UNIVERSE
STELLAR POPULATIONS
STAR-FORMATION
DISTANCE DETERMINATION
ECHELLE SPECTROGRAPH
ABUNDANCE TRENDS
DWARF GALAXIES
Y-2 ISOCHRONES

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Ruchti, G. R., Fulbright, J. P., Wyse, R. F. G., Gilmore, G. F., Bienayme, O., Bland-Hawthorn, J., Gibson, B. K., Grebel, E. K., Helmi, A., Munari, U., Navarro, J. F., Parker, Q. A., Reid, W., Seabroke, G. M., Siebert, A., Siviero, A., Steinmetz, M., Watson, F. G., Williams, M., & Zwitter, T. (2011). Observational Properties of the Metal-poor Thick Disk of the Milky Way and Insights into its Origins. Astrophysical Journal, 737(1), 1-24. Article 9. https://doi.org/10.1088/0004-637X/737/1/9

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abstract = "We have undertaken the study of the elemental abundances and kinematic properties of a metal-poor sample of candidate thick-disk stars selected from the Radial Velocity Experiment spectroscopic survey of bright stars to differentiate among the present scenarios of the formation of the thick disk. In this paper, we report on a sample of 214 red giant branch, 31 red clump/horizontal branch, and 74 main-sequence/sub-giant branch metal-poor stars, which serves to augment our previous sample of only giant stars. We find that the thick disk [α/Fe] ratios are enhanced and have little variation (",

keywords = "Galaxy: abundances, Galaxy: disk, stars: abundances, stars: late-type, GALACTIC CHEMICAL EVOLUTION, VELOCITY EXPERIMENT RAVE, DARK-MATTER UNIVERSE, STELLAR POPULATIONS, STAR-FORMATION, DISTANCE DETERMINATION, ECHELLE SPECTROGRAPH, ABUNDANCE TRENDS, DWARF GALAXIES, Y-2 ISOCHRONES",

author = "Ruchti, \{Gregory R.\} and Fulbright, \{Jon P.\} and Wyse, \{Rosemary F. G.\} and Gilmore, \{Gerard F.\} and Olivier Bienayme and Joss Bland-Hawthorn and Gibson, \{Brad K.\} and Grebel, \{Eva K.\} and Amina Helmi and Ulisse Munari and Navarro, \{Julio F.\} and Parker, \{Quentin A.\} and Warren Reid and Seabroke, \{George M.\} and Arnaud Siebert and Alessandro Siviero and Matthias Steinmetz and Watson, \{Fred G.\} and Mary Williams and Tomaz Zwitter",

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doi = "10.1088/0004-637X/737/1/9",

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Ruchti, GR, Fulbright, JP, Wyse, RFG, Gilmore, GF, Bienayme, O, Bland-Hawthorn, J, Gibson, BK, Grebel, EK, Helmi, A, Munari, U, Navarro, JF, Parker, QA, Reid, W, Seabroke, GM, Siebert, A, Siviero, A, Steinmetz, M, Watson, FG, Williams, M & Zwitter, T 2011, 'Observational Properties of the Metal-poor Thick Disk of the Milky Way and Insights into its Origins', Astrophysical Journal, vol. 737, no. 1, 9, pp. 1-24. https://doi.org/10.1088/0004-637X/737/1/9

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AU - Ruchti, Gregory R.

AU - Fulbright, Jon P.

AU - Wyse, Rosemary F. G.

AU - Gilmore, Gerard F.

AU - Bienayme, Olivier

AU - Bland-Hawthorn, Joss

AU - Gibson, Brad K.

AU - Grebel, Eva K.

AU - Helmi, Amina

AU - Munari, Ulisse

AU - Navarro, Julio F.

AU - Parker, Quentin A.

AU - Reid, Warren

AU - Seabroke, George M.

AU - Siebert, Arnaud

AU - Siviero, Alessandro

AU - Steinmetz, Matthias

AU - Watson, Fred G.

AU - Williams, Mary

AU - Zwitter, Tomaz

PY - 2011/8/10

Y1 - 2011/8/10

N2 - We have undertaken the study of the elemental abundances and kinematic properties of a metal-poor sample of candidate thick-disk stars selected from the Radial Velocity Experiment spectroscopic survey of bright stars to differentiate among the present scenarios of the formation of the thick disk. In this paper, we report on a sample of 214 red giant branch, 31 red clump/horizontal branch, and 74 main-sequence/sub-giant branch metal-poor stars, which serves to augment our previous sample of only giant stars. We find that the thick disk [α/Fe] ratios are enhanced and have little variation (

AB - We have undertaken the study of the elemental abundances and kinematic properties of a metal-poor sample of candidate thick-disk stars selected from the Radial Velocity Experiment spectroscopic survey of bright stars to differentiate among the present scenarios of the formation of the thick disk. In this paper, we report on a sample of 214 red giant branch, 31 red clump/horizontal branch, and 74 main-sequence/sub-giant branch metal-poor stars, which serves to augment our previous sample of only giant stars. We find that the thick disk [α/Fe] ratios are enhanced and have little variation (

KW - Galaxy: abundances

KW - Galaxy: disk

KW - stars: abundances

KW - stars: late-type

KW - GALACTIC CHEMICAL EVOLUTION

KW - VELOCITY EXPERIMENT RAVE

KW - DARK-MATTER UNIVERSE

KW - STELLAR POPULATIONS

KW - STAR-FORMATION

KW - DISTANCE DETERMINATION

KW - ECHELLE SPECTROGRAPH

KW - ABUNDANCE TRENDS

KW - DWARF GALAXIES

KW - Y-2 ISOCHRONES

UR - http://adsabs.harvard.edu/abs/2011ApJ...737....9R

U2 - 10.1088/0004-637X/737/1/9

DO - 10.1088/0004-637X/737/1/9

M3 - Article

SN - 0004-637X

VL - 737

SP - 1

EP - 24

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 9

ER -

Observational Properties of the Metal-poor Thick Disk of the Milky Way and Insights into its Origins

Abstract

Keywords

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RAVE spectroscopic data of stars in the thick disk

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Observational Properties of the Metal-poor Thick Disk of the Milky Way and Insights into its Origins

Abstract

Keywords

Access to Document

Handle.net

Other files and links

Embargoed Document

Fingerprint

Datasets

RAVE spectroscopic data of stars in the thick disk

Cite this