Flare and Warp of Galactic Disk with OB Stars from Gaia DR2
Flare and Warp of Galactic Disk with OB Stars from Gaia DR2
复制标题
带有来自盖亚 DR2 的 OB 星的银盘耀斑和扭曲
DOI:
10.3847/1538-4357/aafa17
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发表时间:
2019-02
期刊:
影响因子:
--
通讯作者:
Wang Qixun
中科院分区:
文献类型:
--
作者:
Li Chengdong;Zhao Gang;Jia Yunpeng;Liao Shilong;Yang Chengqun;Wang Qixun
The OB stars are selected from the Gaia DR2 catalog to explore the flare and warp of the Galactic disk in this work. The Gaia and 2MASS photometric information is adopted as the criteria to choose the sample stars. We model the Galactic disk stellar distribution in this work taking the flare and warp into consideration. The parameters in the flare and warp model are acquired directly by fitting the stars with the stellar distribution function of the disk. We obtain that the scale length of the Galactic disk in space density is 2.10 ± 0.01 kpc. We find that the disk scale height increases with Galactic radius via fitting our sample stars perpendicular to the Galactic plane. The scale height of OB stars increases more moderately than old stellar populations in the disk. It is also concluded that the inner disk is flat and begins to warp at about 9 kpc away from Galactic center. The warp amplitude of OB stars is similar to pulsars and slowly increases along the Galactic radius.
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影响因子:
3.5
作者:
C. Bailer-Jones
通讯作者:
C. Bailer-Jones
DOI:
10.1088/0004-637x/718/2/683
发表时间:
2010-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
G. Carraro;R. Vazquez;E. Costa;Gabriel I. Perren;A. Moitinho
通讯作者:
G. Carraro;R. Vazquez;E. Costa;Gabriel I. Perren;A. Moitinho
DOI:
10.1051/0004-6361/201629916
发表时间:
2017-02
期刊:
arXiv: Astrophysics of Galaxies
影响因子:
--
作者:
E. Poggio;E. Poggio;R. Drimmel;R. Smart;R. Smart;A. Spagna;M. Lattanzi
通讯作者:
E. Poggio;E. Poggio;R. Drimmel;R. Smart;R. Smart;A. Spagna;M. Lattanzi
DOI:
10.1088/0004-637x/794/1/90
发表时间:
2014-08
期刊:
The Astrophysical Journal
影响因子:
--
作者:
P. Kalberla;J. Kerp;L. Dedes;U. Haud
通讯作者:
P. Kalberla;J. Kerp;L. Dedes;U. Haud
影响因子:
6.5
作者:
S. Picaud;A. Besancon;Astronomisches Rechen-Institut Heidelberg
通讯作者:
S. Picaud;A. Besancon;Astronomisches Rechen-Institut Heidelberg