The Young Stars in the Galactic Center

doi:10.3847/2041-8213/ac68ef

	The Young Stars in the Galactic Center
	von Fellenberg, Sebastiano D.1,2; Gillessen, Stefan 2; Stadler, Julia 3; Bauboeck, Michi 4; Genzel, Reinhard 2,5,6; de Zeeuw, Tim 2,7; Pfuhl, Oliver 8; Seoane, Pau Amaro 2,9,10,11; Drescher, Antonia 2; Eisenhauer, Frank 2
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2022-06-01
卷号	932 期号:1 页码:29
ISSN号	2041-8205
DOI	10.3847/2041-8213/ac68ef
英文摘要	We present a large similar to 30 '' x 30 '' spectroscopic survey of the Galactic Center using the SINFONI IFU at the VLT. Combining observations of the last two decades we compile spectra of over 2800 stars. Using the Bracket-gamma absorption lines, we identify 195 young stars, extending the list of known young stars by 79. In order to explore the angular momentum distribution of the young stars, we introduce an isotropic cluster prior. This prior reproduces an isotropic cluster in a mathematically exact way, which we test through numerical simulations. We calculate the posterior angular momentum space as a function of projected separation from Sgr A*. We find that the observed young star distribution is substantially different from an isotropic cluster. We identify the previously reported feature of the clockwise disk and find that its angular momentum changes as a function of separation from the black hole and thus confirm a warp of the clockwise disk (p similar to 99.2%). At large separations, we discover three prominent overdensities of the angular momentum. One overdensity has been reported previously, the counterclockwise disk. The other two are new. Determining the likely members of these structures, we find that as many as 75% of stars can be associated with one of these features. Stars belonging to the warped clockwise disk show a top-heavy K-band luminosity function, while stars belonging to the larger separation features do not. Our observations are in good agreement with the predictions of simulations of in situ star formation and argue for the common formation of these structures.
资助项目	Max Planck International Research School
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000809245700001
内容类型	期刊论文
源URL	[http://ir.amss.ac.cn/handle/2S8OKBNM/61490]
专题	中国科学院数学与系统科学研究院
通讯作者	von Fellenberg, Sebastiano D.
作者单位	1.Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn, Germany 2.Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany 3.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany 4.Univ Illinois, 1002 W Green St, Urbana, IL 61801 USA 5.Univ Calif Berkeley, Dept Phys, Le Conte Hall, Berkeley, CA 94720 USA 6.Univ Calif Berkeley, Dept Astron, Le Conte Hall, Berkeley, CA 94720 USA 7.Leiden Univ, Sterrewacht Leiden, Postbus 9513, NL-2300 RA Leiden, Netherlands 8.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 9.Univ Politecn Valencia, Inst Multidisciplinary Math, Valencia, Spain 10.Peking Univ, Kavli Inst Astron & Astrophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	von Fellenberg, Sebastiano D.,Gillessen, Stefan,Stadler, Julia,et al. The Young Stars in the Galactic Center[J]. ASTROPHYSICAL JOURNAL LETTERS,2022,932(1):29.
APA	von Fellenberg, Sebastiano D..,Gillessen, Stefan.,Stadler, Julia.,Bauboeck, Michi.,Genzel, Reinhard.,...&Young, Alice.(2022).The Young Stars in the Galactic Center.ASTROPHYSICAL JOURNAL LETTERS,932(1),29.
MLA	von Fellenberg, Sebastiano D.,et al."The Young Stars in the Galactic Center".ASTROPHYSICAL JOURNAL LETTERS 932.1(2022):29.