THE BULGE RADIAL VELOCITY ASSAY (BRAVA). II. COMPLETE SAMPLE AND DATA RELEASE

被引:200
作者
Kunder, Andrea [1 ]
Koch, Andreas [2 ]
Rich, R. Michael [3 ]
de Propris, Roberto [1 ]
Howard, Christian D. [4 ]
Stubbs, Scott A. [1 ]
Johnson, Christian I. [3 ]
Shen, Juntai [5 ]
Wang, Yougang [6 ]
Robin, Annie C. [7 ]
Kormendy, John [8 ]
Soto, Mario [9 ]
Frinchaboy, Peter [10 ]
Reitzel, David B. [3 ,11 ]
Zhao, HongSheng [12 ]
Origlia, Livia [13 ]
机构
[1] Cerro Tololo Interamer Observ, La Serena, Chile
[2] Heidelberg Univ, Zentrum Astron, Heidelberg, Germany
[3] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[4] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
[5] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
[6] Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
[7] Univ Besancon, Observ Sci, F-25030 Besancon, France
[8] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA
[9] Univ La Serena, Dept Fis, La Serena, Chile
[10] Texas Christian Univ, Dept Phys & Astron, Ft Worth, TX 76129 USA
[11] Griffith Observ, Los Angeles, CA 90027 USA
[12] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland
[13] INAF, Osservatorio Astron Bologna, I-40127 Bologna, Italy
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
Galaxy: center; stars: abundances; stars: distances; stars: Population II; surveys; 1ST DETAILED ABUNDANCES; GALACTIC BULGE; M-GIANTS; BAADES WINDOW; MILKY-WAY; STELLAR PARAMETERS; RED-CLUMP; GALAXY; STARS; METALLICITY;
D O I
10.1088/0004-6256/143/3/57
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present new radial velocity measurements from the Bulge Radial Velocity Assay, a large-scale spectroscopic survey of M-type giants in the Galactic bulge/bar region. The sample of similar to 4500 new radial velocities, mostly in the region -10 degrees < l < +10 degrees and b approximate to -6 degrees, more than doubles the existent published data set. Our new data extend our rotation curve and velocity dispersion profile to +20 degrees, which is similar to 2.8 kpc from the Galactic center. The new data confirm the cylindrical rotation observed at -6 degrees and -8 degrees and are an excellent fit to the Shen et al. N-body bar model. We measure the strength of the TiO epsilon molecular band as a first step toward a metallicity ranking of the stellar sample, from which we confirm the presence of a vertical abundance gradient. Our survey finds no strong evidence of previously unknown kinematic streams. We also publish our complete catalog of radial velocities, photometry, TiO band strengths, and spectra, which is available at the Infrared Science Archive as well as at UCLA.
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页数:14
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