THE TIME-DOMAIN SPECTROSCOPIC SURVEY: UNDERSTANDING THE OPTICALLY VARIABLE SKY WITH SEQUELS IN SDSS-III

被引：17

作者：

Ruan, John J. ^{[1
]}

Anderson, Scott F. ^{[1
]}

Green, Paul J. ^{[2
]}

Morganson, Eric ^{[2
]}

Eracleous, Michael ^{[3
,4
]}

Myers, Adam D. ^{[5
]}

Badenes, Carles ^{[6
,7
]}

Bershady, Matthew A. ^{[8
]}

Brandt, William N. ^{[3
,4
,9
]}

Chambers, Kenneth C. ^{[10
]}

Davenport, James R. A. ^{[11
]}

Dawson, Kyle S. ^{[12
]}

Flewelling, Heather ^{[10
]}

Heckman, Timothy M. ^{[13
]}

Isler, Jedidah C. ^{[14
]}

Kaiser, Nick

Kneib, Jean-Paul ^{[15
,16
]}

MacLeod, Chelsea L. ^{[17
]}

Paris, Isabelle ^{[18
]}

Ross, Nicholas P. ^{[17
]}

Runnoe, Jessie C. ^{[3
,4
]}

Schlafly, Edward F. ^{[19
]}

Schmidt, Sarah J. ^{[20
,21
]}

Schneider, Donald P. ^{[3
,4
]}

Schwope, Axel D. ^{[21
]}

Shen, Yue ^{[22
,23
]}

Stassun, Keivan G. ^{[14
,24
]}

Szkody, Paula ^{[1
]}

Waters, Christoper Z.

York, Donald G. ^{[25
,26
]}

机构：

[1] Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA

[2] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[3] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[4] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA

[5] Univ Wyoming, Dept Phys & Astron 3905, 1000 E Univ, Laramie, WY 82071 USA

[6] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[7] Univ Pittsburgh, Pittsburgh Particle Phys Astrophys & Cosmol Ctr P, Pittsburgh, PA 15260 USA

[8] Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA

[9] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA

[10] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[11] Western Washington Univ, Dept Phys & Astron, Bellingham, WA 98225 USA

[12] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

[13] Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, Baltimore, MD 21218 USA

[14] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[15] Ecole Polytech Fed Lausanne, Observ Sauverny, Astrophys Lab, CH-1290 Versoix, Switzerland

[16] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France

[17] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland

[18] Osserv Astron Trieste, Ist Nazl Fis Nucl, Via GB Tiepolo 11, I-34131 Trieste, Italy

[19] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[20] Ohio State Univ, Dept Astron, 140 W 18Th Ave, Columbus, OH 43210 USA

[21] Leibniz Inst Astrophys Potsdam AIP, An Der Sternwarte 16, D-14482 Potsdam, Germany

[22] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China

[23] Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA

[24] Fisk Univ, Dept Phys, Nashville, TN 37208 USA

[25] Univ Chicago, Dept Astron & Astrophys, 5640 South Ellis Ave, Chicago, IL 60615 USA

[26] Univ Chicago, Enrico Fermi Inst, 5640 South Ellis Ave, Chicago, IL 60615 USA

来源：

ASTROPHYSICAL JOURNAL | 2016年 / 825卷 / 02期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

quasars: general; stars: variables: general; surveys; BROAD-ABSORPTION-LINE; ACTIVE GALACTIC NUCLEI; PHOTOMETRICALLY CLASSIFIED QUASARS; TRACING GALAXY FORMATION; BLACK-HOLE BINARY; RR LYRAE STARS; LOW-MASS STARS; DATA RELEASE; M-DWARFS; EMISSION-LINE;

D O I：

10.3847/0004-637X/825/2/137

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Time-Domain Spectroscopic Survey (TDSS) is an SDSS-IV eBOSS subproject primarily aimed at obtaining identification spectra of similar to 220,000 optically variable objects systematically selected from SDSS/Pan-STARRS1 multi-epoch imaging. We present a preview of the science enabled by TDSS, based on TDSS spectra taken over similar to 320 deg(2) of sky as part of the SEQUELS survey in SDSS-III, which is in part a pilot survey for eBOSS in SDSS-IV. Using the 15,746 TDSS-selected single-epoch spectra of photometrically variable objects in SEQUELS, we determine the demographics of our variability-selected sample and investigate the unique spectral characteristics inherent in samples selected by variability. We show that variability-based selection of quasars complements color-based selection by selecting additional redder quasars and mitigates redshift biases to produce a smooth quasar redshift distribution over a wide range of redshifts. The resulting quasar sample contains systematically higher fractions of blazars and broad absorption line quasars than from color-selected samples. Similarly, we show that M dwarfs in the TDSS-selected stellar sample have systematically higher chromospheric active fractions than the underlying M-dwarf population based on their Ha emission. TDSS also contains a large number of RR Lyrae and eclipsing binary stars with main-sequence colors, including a few composite-spectrum binaries. Finally, our visual inspection of TDSS spectra uncovers a significant number of peculiar spectra, and we highlight a few cases of these interesting objects. With a factor of similar to 15 more spectra, the main TDSS survey in SDSS-IV will leverage the lessons learned from these early results for a variety of time-domain science applications.

引用

页数：16

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