SELECTING M GIANTS WITH INFRARED PHOTOMETRY: DISTANCES, METALLICITIES, AND THE SAGITTARIUS STREAM
SELECTING M GIANTS WITH INFRARED PHOTOMETRY: DISTANCES, METALLICITIES, AND THE SAGITTARIUS STREAM
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用红外光度测定法选择 m 个巨星:距离、金属丰度和人马座流
DOI:
10.3847/0004-637x/823/1/59
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发表时间:
2016-03
影响因子:
4.9
通讯作者:
Tian Hao
中科院分区:
文献类型:
--
作者:
Li Jing;Smith Martin C.;Zhong Jing;Hou Jinliang;Carlin Jeffrey L.;Newberg Heidi Jo;Liu Chao;Chen Li;Li Linlin;Shao Zhengyi;Small Emma;Tian Hao
Using a spectroscopically confirmed sample of M giants, M dwarfs, and quasars from the LAMOST survey, we assess how well Wide-field Infrared Survey Explorer (WISE) and Two Micron All Sky Survey color cuts can be used to select M giant stars. The WISE bands are very efficient at separating M giants from M dwarfs, and we present a simple classification that can produce a clean and relatively complete sample of M giants. We derive a new photometric relation to estimate the metallicity for M giants, calibrated using data from the APOGEE survey. We find a strong correlation between the color and , where almost all of the scatter is due to photometric uncertainties. We show that previous photometric distance relations, which are mostly based on stellar models, may be biased and devise a new empirical distance relation, investigating trends with metallicity and star formation history. Given these relations, we investigate the properties of M giants in the Sagittarius stream. The offset in the orbital plane between the leading and trailing tails is reproduced, and by identifying distant M giants in the direction of the Galactic anticenter, we confirm that the previously detected debris in the outer halo is the apocenter of the trailing tail. We also find tentative evidence supporting an existing overdensity near the leading tail in the northern Galactic hemisphere, possibly an extension to the trailing tail (so-called Branch C). We have measured the metallicity distribution along the stream, finding a clear metallicity offset between the leading and trailing tails, in agreement with models for the stream formation. We include an online table of M giants to facilitate further studies.
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DOI:
10.1088/2041-8205/760/1/l6
发表时间:
2012-09
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
A. Bonaca;M. Geha;N. Kallivayalil
通讯作者:
A. Bonaca;M. Geha;N. Kallivayalil
DOI:
10.1086/379316
发表时间:
2003-09
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
H. Newberg;B. Yanny;E. Grebel;G. Hennessy;Ž. Ivezić;D. Martinez-Delgado;M. Odenkirchen;H. Rix
通讯作者:
H. Newberg;B. Yanny;E. Grebel;G. Hennessy;Ž. Ivezić;D. Martinez-Delgado;M. Odenkirchen;H. Rix
DOI:
10.1093/mnras/stv946
发表时间:
2015-05
期刊:
arXiv: Astrophysics of Galaxies
影响因子:
--
作者:
T. D. Boer;V. Belokurov;Sergey E. Koposov
通讯作者:
T. D. Boer;V. Belokurov;Sergey E. Koposov
影响因子:
5.3
作者:
Zhong Jing;Lepine Sebastien;Hou Jinliang;Shen Shiyin;Yuan Haibo;Huo Zhiying;Zhang Huihua;Xiang Maosheng;Zhang Huawei;Liu Xiaowei
通讯作者:
Liu Xiaowei
DOI:
10.1086/338983
发表时间:
2001-11
期刊:
The Astrophysical Journal
影响因子:
--
作者:
H. Newberg;B. Yanny;C. Rockosi;E. Grebel;H. Rix;J. Brinkmann;I. Csabai;G. Hennessy;R. Hindsley-R.-Hi
通讯作者:
H. Newberg;B. Yanny;C. Rockosi;E. Grebel;H. Rix;J. Brinkmann;I. Csabai;G. Hennessy;R. Hindsley-R.-Hi