First Assessment of the Binary Lens OGLE-2015-BLG-0232

First Assessment of the Binary Lens OGLE-2015-BLG-0232
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DOI：
10.3847/1538-4357/aaedb9
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发表时间：
2018-11
期刊：
The Astrophysical Journal
影响因子：
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通讯作者：
E. Bachelet;V. Bozza;C. Han;A. Udalski;I. Bond;J. Beaulieu;J. Beaulieu;R. Street;Hyosun Kim;D. Bramich;A. Cassan;M. Dominik;R. Jaimes;R. Jaimes;R. Jaimes;K. Horne;M. Hundertmark;M. Hundertmark;S. Mao;J. Menzies;C. Ranc;R. Schmidt;C. Snodgrass;I. Steele;Y. Tsapras;J. Wambsganss;P. Mróz;I. Soszyński;M. Szymański;J. Skowron;P. Pietrukowicz;S. Kozłowski;R. Poleski;K. Ulaczyk;M. Pawlak;F. Abe;R. Barry;D. Bennett;D. Bennett;A. Bhattacharya;A. Bhattacharya;M. Donachie;A. Fukui;A. Fukui;Y. Hirao;Y. Itow;K. Kawasaki;I. Kondo;N. Koshimoto;M. Li;Y. Matsubara;Y. Muraki;Sei Miyazaki;M. Nagakane;N. Rattenbury;H. Suematsu;D. Sullivan;T. Sumi;D. Suzuki;P. Tristram;A. Yonehara
E. Bachelet;V. Bozza;C. Han;A. Udalski;I. Bond;J. Beaulieu;J. Beaulieu;R. Street;Hyosun Kim;D. Bramich;A. Cassan;M. Dominik;R. Jaimes;R. Jaimes;R. Jaimes;K. Horne;M. Hundertmark;M. Hundertmark;S. Mao;J. Menzies;C. Ranc;R. Schmidt;C. Snodgrass;I. Steele;Y. Tsapras;J. Wambsganss;P. Mróz;I. Soszyński;M. Szymański;J. Skowron;P. Pietrukowicz;S. Kozłowski;R. Poleski;K. Ulaczyk;M. Pawlak;F. Abe;R. Barry;D. Bennett;D. Bennett;A. Bhattacharya;A. Bhattacharya;M. Donachie;A. Fukui;A. Fukui;Y. Hirao;Y. Itow;K. Kawasaki;I. Kondo;N. Koshimoto;M. Li;Y. Matsubara;Y. Muraki;Sei Miyazaki;M. Nagakane;N. Rattenbury;H. Suematsu;D. Sullivan;T. Sumi;D. Suzuki;P. Tristram;A. Yonehara
中科院分区：
其他
文献类型：
--
作者：
E. Bachelet;V. Bozza;C. Han;A. Udalski;I. Bond;J. Beaulieu;J. Beaulieu;R. Street;Hyosun Kim;D. Bramich;A. Cassan;M. Dominik;R. Jaimes;R. Jaimes;R. Jaimes;K. Horne;M. Hundertmark;M. Hundertmark;S. Mao;J. Menzies;C. Ranc;R. Schmidt;C. Snodgrass;I. Steele;Y. Tsapras;J. Wambsganss;P. Mróz;I. Soszyński;M. Szymański;J. Skowron;P. Pietrukowicz;S. Kozłowski;R. Poleski;K. Ulaczyk;M. Pawlak;F. Abe;R. Barry;D. Bennett;D. Bennett;A. Bhattacharya;A. Bhattacharya;M. Donachie;A. Fukui;A. Fukui;Y. Hirao;Y. Itow;K. Kawasaki;I. Kondo;N. Koshimoto;M. Li;Y. Matsubara;Y. Muraki;Sei Miyazaki;M. Nagakane;N. Rattenbury;H. Suematsu;D. Sullivan;T. Sumi;D. Suzuki;P. Tristram;A. Yonehara

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我们对微透镜事件OGLE-2015-BLG-0232进行了分析。由于两个原因，该事件难以定性。首先，由于满月的接近影响了测光质量，在焦散交叉期间没有很好地采样光变曲线。此外，由于该事件与附近的K矮星星星混合，因此很难估计源的亮度。我们发现，光变曲线的偏差可能是由于一个密切的褐矮星同伴（即，s = 0.55和q = 0.06），但透镜的确切性质仍然未知。最后，我们讨论了潜在的后续观测估计的透镜的质量和距离在未来。
We present an analysis of the microlensing event OGLE-2015-BLG-0232. This event is challenging to characterize for two reasons. First, the light curve is not well sampled during the caustic crossing due to the proximity of the full Moon impacting the photometry quality. Moreover, the source brightness is difficult to estimate because this event is blended with a nearby K dwarf star. We found that the light-curve deviations are likely due to a close brown dwarf companion (i.e., s = 0.55 and q = 0.06), but the exact nature of the lens is still unknown. We finally discuss the potential of follow-up observations to estimate the lens mass and distance in the future.