arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1009.0960astro-ph.HEastro-ph.SR
收藏

快速衰变的超新星2010 X:一个候选的“.Ia”爆炸

Rapidly Decaying Supernova 2010X: A Candidate ".Ia" Explosion

Mansi M. Kasliwal, S. R. Kulkarni, Avishay Gal-Yam, Ofer Yaron, Robert M. Quimby, Eran O. Ofek, Peter Nugent, Dovi Poznanski, Janet Jacobsen, Assaf Sternberg, I… 展开作者

Mansi M. Kasliwal, S. R. Kulkarni, Avishay Gal-Yam, Ofer Yaron, Robert M. Quimby, Eran O. Ofek, Peter Nugent, Dovi Poznanski, Janet Jacobsen, Assaf Sternberg, Iair Arcavi, D. Andrew Howell, Mark Sullivan, Douglas J Rich, Paul F Burke, Joseph Brimacombe MB ChB FRCA MD, Dan Milisavljevic, Robert Fesen, Lars Bildsten, Ken Shen, S. Bradley Cenko, Joshua S. Bloom, Eric Hsiao, Nicholas M. Law, Neil Gehrels, Stefan Immler, Richard Dekany, Gustavo Rahmer, David Hale, Roger Smith, Jeff Zolkower, Viswa Velur, Richard Walters, John Henning, Kahnh Bui, Dan McKenna

摘要:

本文介绍了SN 2010 X(PTF 10 bhp)的发现、测光和分光跟踪观测。这颗超新星以指数衰减,τ_d=5天,并在速度上与目前的记录保持者SN 2002 bj相媲美。SN 2010 X的最大质量为M_r=-17等,平均速度为10,000 km/s。我们的光变曲线模型表明,一个放射性供电的事件和喷出物的质量为0.16 Msun。如果由镍提供动力,我们表明镍的质量必须非常小(0.02 Msun),超新星很快变得对伽马射线光学薄。我们的光谱模型表明SN 2010 X和SN 2002 bj具有相似的化学成分,并且存在铝或氦之一。如果存在铝,我们推测这可能是一个吸积引起的O-Ne-Mg白矮星的坍缩。如果氦存在,SN 2010 X的所有观测数据都与白矮星上的热核氦壳爆炸一致,即“.Ia”爆炸。通过对Palomar Transient Factory进行为期1天的动态节奏实验,我们预计每年都会发现一些这样的事件。

英文摘要:

We present the discovery, photometric and spectroscopic follow-up observations of SN 2010X (PTF 10bhp). This supernova decays exponentially with tau_d=5 days, and rivals the current recordholder in speed, SN 2002bj. SN 2010X peaks at M_r=-17mag and has mean velocities of 10,000 km/s. Our light curve modeling suggests a radioactivity powered event and an ejecta mass of 0.16 Msun. If powered by Nickel, we show that the Nickel mass must be very small (0.02 Msun) and that the supernova quickly becomes optically thin to gamma-rays. Our spectral modeling suggests that SN 2010X and SN 2002bj have similar chemical compositions and that one of Aluminum or Helium is present. If Aluminum is present, we speculate that this may be an accretion induced collapse of an O-Ne-Mg white dwarf. If Helium is present, all observables of SN 2010X are consistent with being a thermonuclear Helium shell detonation on a white dwarf, a ".Ia" explosion. With the 1-day dynamic-cadence experiment on the Palomar Transient Factory, we expect to annually discover a few such events.

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。

↑