STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS

	STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS
	Oelkers, Ryan J.1; Macri, Lucas M.1; Wang, Lifan1,2,3 ; Ashley, Michael C. B.4; Cui, Xiangqun 3,5; Feng, Long-Long2,3 ; Gong, Xuefei 3,5; Lawrence, Jon S.4,6; Qiang, Liu 3,7; Luong-Van, Daniel 4
刊名	ASTRONOMICAL JOURNAL
	2016-06-01
卷号	151 期号:6
关键词	methods: data analysis stars: flare stars: variables: general
英文摘要	The Chinese Small Telescope Array (CSTAR) carried out high-cadence time-series observations of 20.1 square degrees centered on the South Celestial Pole during the 2008, 2009, and 2010 winter seasons from Dome A in Antarctica. The nearly continuous six months of dark conditions during each observing season allowed for >106 images to be collected through gri and clear filters, resulting in the detection of >10(4) sources over the course of three years of operation. The nearly space-like conditions in the Antarctic plateau are an ideal testbed for the suitability of very small-aperture (<20 cm) telescopes to detect transient events, variable stars, and stellar flares. We present the results of a robust search for such objects using difference image analysis of the data obtained during the 2009 and 2010 winter seasons. While no transients were found, we detected 29 flaring events and find a normalized flaring rate of 5 +/- 4 x 10(-7) flare hr(-1) for late-K dwarfs, 1 1 x 10(-6) flare hr(-1) for M dwarfs and 7 1 x 10(-7) flare hr(-1) for all other stars in our sample. We suggest future small -aperture telescopes planned for deployment at Dome A would benefit from a tracking mechanism, to help alleviate effects from ghosting, and a finer pixel scale, to increase the telescope's sensitivity to faint objects. We find that the light curves of non-transient sources have excellent photometric qualities once corrected for systematics, and are limited only by photon noise and atmospheric scintillation.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	DIGITAL SKY SURVEY ; OPTIMAL IMAGE SUBTRACTION ; VARIABLE-STARS ; ECLIPSING BINARIES ; IA SUPERNOVAE ; LIGHT CURVES ; SPACED DATA ; M DWARFS ; PHOTOMETRY ; TELESCOPE
收录类别	SCI
语种	英语
WOS记录号	WOS:000377990300033
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16254]
专题	紫金山天文台_南极天文中心
作者单位	1.Texas A&M Univ, Dept Phys & Astron, George P & Cynthia W Mitchell Inst Fundamental Ph, College Stn, TX 77843 USA 2.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China 3.Chinese Ctr Antarctic Astron, Nanjing, Jiangsu, Peoples R China 4.Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia 5.Nanjing Inst Astron Opt & Technol, Nanjing, Jiangsu, Peoples R China 6.Australian Astron Observ, N Ryde, NSW, Australia 7.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 8.Lawrence Berkeley Natl Lab, Inst Nucl & Particle Astrophys, Berkeley, CA USA 9.Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA 10.Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA
推荐引用方式 GB/T 7714	Oelkers, Ryan J.,Macri, Lucas M.,Wang, Lifan,et al. STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS[J]. ASTRONOMICAL JOURNAL,2016,151(6).
APA	Oelkers, Ryan J..,Macri, Lucas M..,Wang, Lifan.,Ashley, Michael C. B..,Cui, Xiangqun.,...&Zhu, Zhenxi.(2016).STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS.ASTRONOMICAL JOURNAL,151(6).
MLA	Oelkers, Ryan J.,et al."STELLAR VARIABILITY AND FLARE RATES FROM DOME A, ANTARCTICA, USING 2009 AND 2010 CSTAR OBSERVATIONS".ASTRONOMICAL JOURNAL 151.6(2016).