CENSUS OF BLUE STARS IN SDSS DR8

被引:3
|
作者
Scibelli, Samantha [1 ,2 ]
Newberg, Heidi Jo [2 ]
Carlin, Jeffrey L. [2 ]
Yanny, Brian [3 ]
机构
[1] Burnt Hills Ballston Lake High Sch, Ballston, NY 12027 USA
[2] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA
[3] Fermilab Natl Accelerator Lab, Expt Astrophys Grp, Batavia, IL 60510 USA
来源
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2014年 / 215卷 / 02期
基金
美国国家科学基金会; 美国安德鲁·梅隆基金会;
关键词
blue stragglers; Galaxy: stellar content; novae; cataclysmic variables; stars: AGB and post-AGB; stars: horizontal-branch; stars: statistics; subdwarfs; white dwarfs; DIGITAL SKY SURVEY; SURVEY COMMISSIONING DATA; WHITE-DWARFS; CATACLYSMIC VARIABLES; OPEN CLUSTERS; MILKY-WAY; CATALOG; SEGUE; SPECTROSCOPY; VALIDATION;
D O I
10.1088/0067-0049/215/2/24
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a census of the 12,060 spectra of blue objects ((g-r)(0) < -0.25) in the Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8). As part of the data release, all of the spectra were cross-correlated with 48 template spectra of stars, galaxies, and QSOs to determine the best match. We compared the blue spectra by eye to the templates assigned in SDSS DR8. 10,856 of the objects matched their assigned template, 170 could not be classified due to low signal-to-noise ratio, and 1034 were given new classifications. We identify 7458 DA white dwarfs, 1145 DB white dwarfs, 273 rarer white dwarfs (including carbon, DZ, DQ, and magnetic), 294 subdwarf O stars, 648 subdwarf B stars, 679 blue horizontal branch stars, 1026 blue stragglers, 13 cataclysmic variables, 129 white dwarf-M dwarf binaries, 36 objects with spectra similar to DO white dwarfs, 179, quasi-stellar objects (QSOs), and 10 galaxies. We provide two tables of these objects, sample spectra that match the templates, figures showing all of the spectra that were grouped by eye, and diagnostic plots that show the positions, colors, apparent magnitudes, proper motions, etc., for each classification. Future surveys will be able to use templates similar to stars in each of the classes we identify to automatically classify blue stars, including rare types.
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页数:25
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