Vertical distribution of Galactic disk stars

被引：0

作者：

Soubiran, C. ^{[1
]}

Bienaymé, O. ^{[2
]}

Mishenina, V. ^{[3
]}

Kovtyukh, V. ^{[3
]}

机构：

[1] Université Bordeaux 1, CNRS, Laboratoire d'Astrophysique de Bordeaux, BP 89, 33270 Floirac, France

[2] Université de Strasbourg, CNRS Observatoire Astronomique, 11 rue de l'Université, 67000 Strasbourg, France

[3] Astronomical Observatory, Odessa National University, Shevchenko Park, 65014 Odessa, Ukraine

来源：

Astronomy and Astrophysics | 2008年 / 480卷 / 01期

关键词：

We present the parameters of 891 stars; mostly clump giants; including atmospheric parameters; distances; absolute magnitudes; spatial velocities; galactic orbits and ages. One part of this sample consists of local giants; within; 100; pc; with atmospheric parameters either estimated from our spectroscopic observations at high resolution and high signal-to-noise ratio; or retrieved from the literature. The other part of the sample includes 523 distant stars; spanning distances up to 1 kpc in the direction of the North Galactic Pole; for which we have estimated atmospheric parameters from high resolution but low signal-to-noise Echelle spectra. This new sample is kinematically unbiased; with well-defined boundaries in magnitude and colours. We revisit the basic properties of the Galactic thin disk as traced by clump giants. We find the metallicity distribution to be different from that of dwarfs; with fewer metal-rich stars. We find evidence for a vertical metallicity gradient of -0.31 dex kpc and for a transition at ~4-5 Gyr in both the metallicity and velocities. The age-metallicity relation (AMR); which exhibits a very low dispersion; increases smoothly from 10 to 4 Gyr; with a steeper increase for younger stars. The age-velocity relation (AVR) is characterized by the saturation of the and dispersions at 5 Gyr; and continuous heating in U. © 2008 ESO;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Journal article (JA)

引用

页码：91 / 101

共 50 条

[41] Fine vertical structure of the galactic gaseous disk
Yu. N. Mishurov
Astronomy Reports, 2007, 51 : 215 - 221
[42] Vertical structure of the galactic disk in the solar neighborhood
Marsakov, VA
Shevelev, YG
ASTRONOMICHESKII ZHURNAL, 1995, 72 (05): : 630 - 640
[43] Fine vertical structure of the galactic gaseous disk
Mishurov, Yu. N.
ASTRONOMY REPORTS, 2007, 51 (03) : 215 - 221
[44] THE VERTICAL EQUILIBRIUM OF MOLECULAR GAS IN THE GALACTIC DISK
MALHOTRA, S
ASTROPHYSICAL JOURNAL, 1994, 433 (02): : 687 - 704
[45] Vertical structure and kinematics of the Galactic outer disk
Sakai, Nobuyuki
Nagayama, Takumi
Nakanishi, Hiroyuki
Koide, Nagito
Kurayama, Tomoharu
Izumi, Natsuko
Hirota, Tomoya
Yoshida, Toshihiro
Shibata, Katsunori M.
Honma, Mareki
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 2020, 72 (04)
[46] GALACTOSEISMOLOGY: DISCOVERY OF VERTICAL WAVES IN THE GALACTIC DISK
Widrow, Lawrence M.
Gardner, Susan
Yanny, Brian
Dodelson, Scott
Chen, Hsin-Yu
ASTROPHYSICAL JOURNAL LETTERS, 2012, 750 (02)
[47] Vertical Phase Mixing across the Galactic Disk
Li, Zhao-Yu
ASTROPHYSICAL JOURNAL, 2021, 911 (02):
[48] Vertical diffusion of stars in the inner galactic bulge
Kim, SSS
Morris, M
DYNAMICS OF STAR CLUSTERS AND THE MILKY WAY, 2001, 228 : 482 - 484
[49] Age and Metallicity Distributions among Galactic Disk Stars
P.E. Nissen
Astrophysics and Space Science, 1999, 267 : 119 - 128
[50] Age and metallicity distributions among galactic disk stars
Nissen, PE
ASTROPHYSICS AND SPACE SCIENCE, 1999, 267 (1-4) : 119 - 128

← 1 2 3 4 5 →