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Related papers: Local stellar kinematics from RAVE data: II. Radia…

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We investigate radial and vertical metallicity gradients for a sample of red clump stars from the RAdial Velocity Experiment (RAVE) Data Release 3. We select a total of 6781 stars, using a selection of colour, surface gravity and…

Astrophysics of Galaxies · Physics 2015-06-03 S. Bilir , S. Karaali , S. Ak , O. Onal , N. D. Dagtekin , T. Yontan , G. Gilmore , G. M. Seabroke

We investigated the age-metallicity relation using a sample of 5691 F and G type dwarfs from RAVE DR3 by applying several constraints: i) We selected stars with surface gravities log g < 3.8 and effective temperatures in the…

Astrophysics of Galaxies · Physics 2015-06-16 S. Duran , S. Ak , S. Bilir , S. Karaali , T. Ak , Z. F. Bostanci , B. Coskunoglu

We estimated iron and metallicity gradients in the radial and vertical directions with the F and G type dwarfs taken from the RAVE DR4 database. The sample defined by the constraints Zmax<=825 pc and ep<=0.10 consists of stars with metal…

Astrophysics of Galaxies · Physics 2015-11-18 O. Plevne , T. Ak , S. Karaali , S. Bilir , S. Ak , Z. F. Bostanci

We investigate the Milky Way Galaxy's radial and vertical metallicity gradients using a sample of 47,406 red clump stars from the RAVE DR4. This sample is more than twice the size of the largest sample in the literature investigating radial…

Astrophysics of Galaxies · Physics 2016-09-28 O. Onal Tas , S. Bilir , G. M. Seabroke , S. Karaali , S. Ak , T. Ak , Z. F. Bostanci

We examine the metallicity distribution of the Galactic thick disk using F, G, and K dwarf stars selected from the Sloan Digital Sky Survey, Data Release 8. Using the large sample of dwarf stars with proper motions and spectroscopically…

Astrophysics of Galaxies · Physics 2012-11-29 Kenneth Carrell , Yuqin Chen , Gang Zhao

We investigate the vertical metallicity gradients of five mono-age stellar populations between 0 and 11 Gyr for a sample of 18 435 dwarf stars selected from the cross-matched Tycho-Gaia Astrometric Solution (TGAS) and RAdial Velocity…

Astrophysics of Galaxies · Physics 2018-01-16 Ioana Ciucă , Daisuke Kawata , Jane Lin , Luca Casagrande , George Seabroke , Mark Cropper

Using a sample of 213,713 stars from the Radial Velocity Experiment (RAVE) survey, limited to a distance of 2 kpc from the Sun and to |z|<1 kpc, we report the detection of a velocity gradient of disc stars in the fourth quadrant, directed…

We aim to probe the dynamic structure of the extended Solar neighbourhood by calculating the radial metallicity gradients from orbit properties, which are obtained for axisymmetric and non-axisymmetric potential models, of red clump (RC)…

Astrophysics of Galaxies · Physics 2018-02-14 O. Onal Tas , S. Bilir , O. Plevne

We study the kinematics of the Galactic thin and thick disk populations using stars from the RAVE survey's second data release together with distance estimates from Breddels et al. (2009). The velocity distribution exhibits the expected…

Astrophysics of Galaxies · Physics 2015-05-27 Yüksel Karatas , Rainer J. Klement

Using the RAdial Velocity Experiment fourth data release (RAVE DR4), and a new metallicity calibration that will be also taken into account in the future RAVE DR5, we investigate the existence and the properties of super-solar metallicity…

{We present the radial metallicity gradients within the Galactic thin disc population through main-sequence stars selected on the chemical plane using GALAH DR3 accompanied with Gaia DR3 astrometric data. The [Fe/H], [$\alpha$/Fe] and…

Astrophysics of Galaxies · Physics 2024-11-22 F. Akbaba , T. Ak , S. Bilir , O. Plevne , Onal Tas. O , G. M. Seabroke

Based on the LAMOST survey and Sloan Digital Sky Survey (SDSS), we use low-resolution spectra of 130,043 F/G-type dwarf stars to study the kinematics and metallicity properties of the Galactic disk. Our study shows that the stars with…

Astrophysics of Galaxies · Physics 2016-10-12 Yingjie Jing , Cuihua Du , Jiayin Gu , Yunpeng Jia , Xiyan Peng , Yuqin Chen , Zhenyu Wu , Jun Ma , Xu Zhou , Zihuang Cao , Yonghui Hou , Yuefei Wang , Yong Zhang

We study the detailed properties of the radial metallicity gradient in the stellar disk of our Galaxy to constrain its chemical and structural evolution. For this purpose we select and analyze $\sim$ 18,500 disk stars taken from two…

Astrophysics of Galaxies · Physics 2015-06-19 Daisuke Toyouchi , Masashi Chiba

We explore the connections between stellar age, chemistry, and kinematics across a Galactocentric distance of $7.5 < R\,(\mathrm{kpc}) < 9.0$, using a sample of $\sim 12\,000$ intermediate-mass (FGK) turnoff stars observed with the RAdial…

Through a homogeneous analysis of spectroscopic literature data of red giant stars, we determine the radial metallicity profiles of 30 dwarf galaxies in the Local Group. We explore correlations between the calculated metallicity gradients…

Astrophysics of Galaxies · Physics 2022-09-14 S. Taibi , G. Battaglia , R. Leaman , A. Brooks , C. Riggs , F. Munshi , Y. Revaz , P. Jablonka

We analyze radial stellar metallicity and kinematic profiles out to 1Re in 244 CALIFA galaxies ranging from morphological type E to Sd, to study the evolutionary mechanisms of stellar population gradients. We find that linear metallicity…

The formation and evolution of galaxies is imprinted on their stellar population radial gradients. Two recent articles present conflicting results concerning the mass dependence of the metallicity gradients for early-type dwarf galaxies. On…

Cosmology and Nongalactic Astrophysics · Physics 2010-11-11 M. Koleva , Ph. Prugniel , S. De Rijcke , W. W. Zeilinger , D. Michielsen

The observed radial and vertical metallicity distribution of old stars in the Milky Way disk provides a powerful constraint on the chemical enrichment and dynamical history of the disk. We present the radial metallicity gradient,…

The RAdial Velocity Experiment (RAVE) is a spectroscopic survey of the Milky Way. We use the subsample of spectra with spectroscopically determined values of stellar parameters to determine the distances to these stars. The list currently…

We explore the origin of stellar metallicity gradients in simulated and observed dwarf galaxies. We use FIRE-2 cosmological baryonic zoom-in simulations of 26 isolated galaxies as well as existing observational data for 10 Local Group dwarf…

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