arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1711.03608astro-ph.SRastro-ph.EPastro-ph.IM
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用千度极小望远镜巡天观测的$TESS$输入星表中400万个源的光变性质

Variability Properties of 4 Million Sources in the $TESS$ Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey

Ryan J. Oelkers, Joseph E. Rodriguez, Keivan G. Stassun, Joshua Pepper, Garrett Somers, Stella Kafka, Daniel J. Stevens, Thomas G. Beatty, Robert J. Siverd, Mic… 展开作者

Ryan J. Oelkers, Joseph E. Rodriguez, Keivan G. Stassun, Joshua Pepper, Garrett Somers, Stella Kafka, Daniel J. Stevens, Thomas G. Beatty, Robert J. Siverd, Michael B. Lund, Rudolf B. Kuhn, David James, B. Scott Gaudi

摘要:

近十年来,千度极小望远镜(KELT)一直在测量天体的$70\%$以上。虽然巡天的主要科学目标是发现明亮的主星周围的凌日大半径行星,但巡天已经收集了超过100万个$4$源的$10^6$图像,典型的节奏在$10-30$分钟之间,表观视星等在大约$7<V<13$范围内。在这里,我们提供了一个包含52,741个天体的目录,这些天体显示出可能由恒星变化引起的显著的大振幅波动,以及62,229个可能具有恒星旋转周期的天体。检测到的$rms$ -振幅变化范围为3 mmag至2.3 mag,检测到的周期范围为$\sim$ 0.1天至$\gtrsim$ 2000天。我们为所有其他$\sim$ 400万来源提供可变性上限。这些上限主要是恒星亮度的函数,但我们在30分钟的时间尺度上实现了典型的1 $σ$灵敏度,在$V\sim 8$下降至$\sim5$ mmag,在$V\sim 13$下降至$\sim43$ mmag。我们已经将我们的星表与$TESS$输入星表和AAVSO变星索引相匹配,以促进每个源的跟踪和分类。该目录作为动态数据库在Filtergraph可视化门户网站上进行维护,网址为https://filtergraph.com/kelt $\_$ vars

英文摘要:

The Kilodegree Extremely Little Telescope (KELT) has been surveying more than $70\%$ of the celestial sphere for nearly a decade. While the primary science goal of the survey is the discovery of transiting, large-radii planets around bright host stars, the survey has collected more than $10^6$ images, with a typical cadence between $10-30$ minutes, for more than $4$ million sources with apparent visual magnitudes in the approximate range $7<V<13$. Here we provide a catalog of 52,741 objects showing significant large-amplitude fluctuations likely caused by stellar variability and 62,229 objects identified with likely stellar rotation periods. The detected variability ranges in $rms$-amplitude from 3 mmag to 2.3 mag, and the detected periods range from $\sim$0.1 days to $\gtrsim$2000 days. We provide variability upper limits for all other $\sim$4 million sources. These upper limits are principally a function of stellar brightness, but we achieve typical 1$σ$ sensitivity on 30-minute timescales down to $\sim5$ mmag at $V\sim 8$, and down to $\sim43$ mmag at $V\sim 13$. We have matched our catalog to the $TESS$ Input catalog and the AAVSO Variable Star Index to precipitate the follow up and classification of each source. The catalog is maintained as a living database on the Filtergraph visualization portal at the URL https://filtergraph.com/kelt$\_$vars

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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