长型γ射线暴与核心坍缩超新星的环境不同
天体物理学
2008-11-26 v2
摘要
当巨型恒星耗尽其燃料后坍缩，常常会产生被称为核心坍缩超新星的惊人明亮的爆炸。偶尔，这种恒星坍缩也会驱动一种更加卓越的相对论性爆炸，称为持续时间较长的γ射线暴。人们本应期待的是，长型γ射线暴和核心坍缩超新星应当在相似的星系环境中发现。然而，我们在此表明这种期待是错误的。我们发现，长型γ射线暴远远更集中于其宿主星系最亮的区域，而核心坍缩超新星则不然。此外，长型γ射线暴的宿主星系显著暗淡且更不规则，而核心坍缩超新星的宿主星系则较亮且更规则。这些结果表明，长型γ射线暴与最质量较大的恒星相关，可能受限于化学演化有限的星系。我们的结果直接表明，长型γ射线暴在诸如我们自己的银河系这样的星系中相对较少。
引用
@article{arxiv.astro-ph/0603537,
title = {Long gamma-ray bursts and core-collapse supernovae have different environments},
author = {A. S. Fruchter and A. J. Levan and L. Strolger and P. M. Vreeswijk and S. E. Thorsett and D. Bersier and I. Burud and J. M. Castro Cerón and A. J. Castro-Tirado and C. Conselice and T. Dahlen and H. C. Ferguson and J. P. U. Fynbo and P. M. Garnavich and R. A. Gibbons and J. Gorosabel and T. R. Gull and J. Hjorth and S. T. Holland and C. Kouveliotou and Z. Levay and M. Livio and M. R. Metzger and P. E. Nugent and L. Petro and E. Pian and J. E. Rhoads and A. G. Riess and K. C. Sahu and A. Smette and N. R. Tanvir and R. A. M. J. Wijers and S. E. Woosley},
journal= {arXiv preprint arXiv:astro-ph/0603537},
year = {2008}
}
备注
27 pages, 4 figures, submitted to Nature on 22 August 2005, revised 9 February 2006, online publication 10 May 2006. Supplementary material referred to in the text can be found at http://www.stsci.edu/~fruchter/GRB/locations/supplement.pdf . This new version contains minor changes to match the final published version