The Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr
The Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr
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DOI：
10.3847/2041-8213/ab62a4
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
Ping Chen;S. Dong;M. Stritzinger;S. Holmbo;J. Strader;C. Kochanek;E. Peng;S. Benetti;D. Bersier;Sasha R. Brownsberger;D. Buckley;M. Gromadzki;S. Moran;A. Pastorello;E. Aydi;S. Bose;T. Connor;K. Boutsia;F. D. Mille;N. Elias-Rosa;K. D. French;T. Holoien;S. Mattila;B. Shappee;A. Stark;S. Swihart
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文献类型：
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作者：
Ping Chen;S. Dong;M. Stritzinger;S. Holmbo;J. Strader;C. Kochanek;E. Peng;S. Benetti;D. Bersier;Sasha R. Brownsberger;D. Buckley;M. Gromadzki;S. Moran;A. Pastorello;E. Aydi;S. Bose;T. Connor;K. Boutsia;F. D. Mille;N. Elias-Rosa;K. D. French;T. Holoien;S. Mattila;B. Shappee;A. Stark;S. Swihart
我们报告了对缺氢超新星（SN）2019 bkc/ATLAS 19 dqr的观测。由于B带和r带分别在镁和镁的峰值和峰值后10天之间下降，SN 2019 bkc是迄今为止发现的下降最快的SN I。虽然与它最接近的是迅速下降的SN 2005 ek和SN 2010 X，但SN 2019 bkc的光变曲线和光谱显示出一些前所未有的特征。SN 2019 bkc看起来“没有宿主”，在其位置附近没有可识别的宿主星系，尽管它可能与z = 0.02的星系团MKW 1有关。我们评估了一些现有的快速演变的SNe模型，我们发现，没有一个可以令人满意地解释SN 2019 bkc观测的所有方面。
We report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- and r-band decline between peak and 10 days post peak of mag and mag, respectively, SN 2019bkc is the most rapidly declining SN I discovered so far. While its closest matches are the rapidly declining SN 2005ek and SN 2010X, the light curves and spectra of SN 2019bkc show some unprecedented characteristics. SN 2019bkc appears “hostless,” with no identifiable host galaxy near its location, although it may be associated with the galaxy cluster MKW1 at z = 0.02. We evaluate a number of existing models of fast-evolving SNe, and we find that none of them can satisfactorily explain all aspects of SN 2019bkc observations.