arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.4527astro-ph.HE
收藏

与GRB 100316 D有关的SN2010bh的高能膨胀

The Highly Energetic Expansion of SN2010bh Associated with GRB 100316D

Filomena Bufano, Elena Pian, Jesper Sollerman, Stefano Benetti, Giuliano Pignata, Stefano Valenti, Stefano Covino, Paolo D'Avanzo, Daniele Malesani, Enrico Capp… 展开作者

Filomena Bufano, Elena Pian, Jesper Sollerman, Stefano Benetti, Giuliano Pignata, Stefano Valenti, Stefano Covino, Paolo D'Avanzo, Daniele Malesani, Enrico Cappellaro, Massimo Della Valle, Johan Fynbo, Jens Hjorth, Paolo A. Mazzali, Daniel E. Reichart, Rhaana L. C. Starling, Massimo Turatto, Susanna D. Vergani, Klass Wiersema, Lorenzo Amati, David Bersier, Sergio Campana, Zach Cano, Alberto J. Castro-Tirado, Guido Chincarini, Valerio D'Elia, Antonio de Ugarte Postigo, Jinsong Deng, Patrizia Ferrero, Alexei V. Filippenko, Paolo Goldoni, Javier Gorosabel, Jochen Greiner, Francois Hammer, Pall Jakobsson, Lex Kaper, Koji S. Kawabata, Sylvio Klose, Andrew J. Levan, Keiichi Maeda, Nicola Masetti, Bo Milvang-Jensen, Felix I. Mirabel, Palle Moller, Kenichi Nomoto, Eliana Palazzi, Silvia Piranomonte, Ruben Salvaterra, Giulia Stratta, Gianpiero Tagliaferri, Masaomi Tanaka, Nial R. Tanvir, Ralph A. M. J. Wijers

摘要:

我们介绍了附近(z = 0.059)光谱证实的Ic型超新星SN 2010 bh的光谱和光度演化,与软,长持续时间的伽马射线暴(X射线闪光)GRB 100316 D。SN 2010 bh的密集后续观测是在ESO甚大望远镜(VLT)上使用X-shooter和FORS 2仪器进行的。由于详细的时间覆盖和扩展的波长范围(3000- 24800 A),我们获得了一个前所未有的丰富的光谱序列之间的超新星,SN 2010 bh的最好的研究代表这类SN之一。我们发现SN 2010 bh比以前观测到的与GRB相关的SN事件有更快的亮度上升(8.0 +/-1.0静止帧天)和更暗的绝对峰值亮度(L_bol~ 3e 42 erg/s)。我们估计喷射出的(56)Ni质量为0.12 +/- 0.02 Msun。根据宽光谱特征,我们测量到的膨胀速度高达47,000 km/s,高于SNe 1998 bw(GRB 980425)和2006 aj(GRB 060218)。氦吸收线He I λ 5876和He I 1.083 μ m,蓝移分别为~ 20,000 - 30,000 km/s和~ 28,000 - 38,000 km/s。然而,缺乏He I 2.058 microm线的覆盖,使我们无法确认此类鉴定。星云的光谱是在爆炸后约186天拍摄的,在6340 A处显示出一个宽而微弱的[O I]发射。SN 2010 bh的光变曲线形状和光球膨胀速度表明,我们目睹了一次高能爆炸,其喷出质量很小(Ek ~ 1 e52 erg,Mej ~ 3 Msun)。SN 2010 bh的观测性质进一步扩展了GRB超新星的异质性。

英文摘要:

We present the spectroscopic and photometric evolution of the nearby (z = 0.059) spectroscopically confirmed type Ic supernova, SN 2010bh, associated with the soft, long-duration gamma-ray burst (X-ray flash) GRB 100316D. Intensive follow-up observations of SN 2010bh were performed at the ESO Very Large Telescope (VLT) using the X-shooter and FORS2 instruments. Owing to the detailed temporal coverage and the extended wavelength range (3000--24800 A), we obtained an unprecedentedly rich spectral sequence among the hypernovae, making SN 2010bh one of the best studied representatives of this SN class. We find that SN 2010bh has a more rapid rise to maximum brightness (8.0 +/- 1.0 rest-frame days) and a fainter absolute peak luminosity (L_bol~3e42 erg/s) than previously observed SN events associated with GRBs. Our estimate of the ejected (56)Ni mass is 0.12 +/- 0.02 Msun. From the broad spectral features we measure expansion velocities up to 47,000 km/s, higher than those of SNe 1998bw (GRB 980425) and 2006aj (GRB 060218). Helium absorption lines He I lambda5876 and He I 1.083 microm, blueshifted by ~20,000--30,000 km/s and ~28,000--38,000 km/s, respectively, may be present in the optical spectra. However, the lack of coverage of the He I 2.058 microm line prevents us from confirming such identifications. The nebular spectrum, taken at ~186 days after the explosion, shows a broad but faint [O I] emission at 6340 A. The light-curve shape and photospheric expansion velocities of SN 2010bh suggest that we witnessed a highly energetic explosion with a small ejected mass (E_k ~ 1e52 erg and M_ej ~ 3 Msun). The observed properties of SN 2010bh further extend the heterogeneity of the class of GRB supernovae.

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。

↑