The ASAS-SN catalogue of variable stars – V. Variables in the Southern hemisphere
The ASAS-SN catalogue of variable stars – V. Variables in the Southern hemisphere
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DOI：
10.1093/mnras/stz2711
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发表时间：
2019-07
影响因子：
4.8
通讯作者：
T. Jayasinghe;K. Stanek;C. Kochanek;B. Shappee;T. Holoien;T. Thompson;T. Thompson;J. Prieto
中科院分区：
文献类型：
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作者：
T. Jayasinghe;K. Stanek;C. Kochanek;B. Shappee;T. Holoien;T. Thompson;T. Thompson;J. Prieto
全天超新星自动巡天（ASAS-SN）提供了长基线（14年）光变曲线，用于在整个天空中亮于V 17等的光源。作为我们努力表征ASAS-SN中可见的所有恒星源的变化的一部分，我们使用APASS DR 9（AAVSO测光全天巡天数据发布）目录作为我们的输入源列表，为南半球的源产生了1.301亿V波段光变曲线。我们使用基于随机森林分类器的管道系统地搜索了这些来源的可变性。我们已经确定了${\sim } 220\，000$的变量，其中包括${\sim } 88\，300$的新发现。特别是，我们已经发现了${\sim }48\，000$红色脉动变星，${\sim }23\，000$食双星，${\sim} 2200 δ-Scuti变星和${\sim }10\，200$旋转变星。这些变星的光变曲线和特征均可通过ASAS-SN变星数据库（https：//asas-sn.osu.edu/variables）获得。预先计算的所有3010万个源的ASAS-SN V波段光变曲线可通过ASAS-SN测光数据库（https：//asas-sn.osu.edu/photometrics）获得。这项工作将扩展到为北方半球的源和整个天空中未包括在APASS DR 9中的V 17等源提供ASAS-SN光变曲线。
The All-Sky Automated Survey for Supernovae (ASAS-SN) provides long baseline (∼4 yr) light curves for sources brighter than V ≲ 17 mag across the whole sky. As part of our effort to characterize the variability of all the stellar sources visible in ASAS-SN, we have produced ∼30.1 million V-band light curves for sources in the Southern hemisphere using the APASS DR9 (AAVSO Photometric All-Sky Survey Data Release) catalogue as our input source list. We have systematically searched these sources for variability using a pipeline based on random forest classifiers. We have identified ${\sim } 220\, 000$ variables, including ${\sim } 88\, 300$ new discoveries. In particular, we have discovered ${\sim }48\, 000$ red pulsating variables, ${\sim }23\, 000$ eclipsing binaries, ∼2200 δ-Scuti variables, and ${\sim }10\, 200$ rotational variables. The light curves and characteristics of the variables are all available through the ASAS-SN variable stars data base (https://asas-sn.osu.edu/variables). The pre-computed ASAS-SN V-band light curves for all the ∼30.1 million sources are available through the ASAS-SN photometry data base (https://asas-sn.osu.edu/photometry). This effort will be extended to provide ASAS-SN light curves for sources in the Northern hemisphere and for V ≲ 17 mag sources across the whole sky that are not included in APASS DR9.