Identification of the Long-Sought Common-Envelope Events
Identification of the Long-Sought Common-Envelope Events
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识别长期寻找的共同包络事件
DOI：
10.1126/science.1225540
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发表时间：
2013-01
期刊：
影响因子：
56.9
通讯作者：
Lombardi, James C., Jr.
中科院分区：
文献类型：
--
作者：
Ivanova, Natalia;Justham, Stephen;Avendano N;ez, Jose-Luis;Lombardi, James C., Jr.
当恒星靠得太近时，恒星爆发通常分为两类：超新星和新星，分别是演化恒星表面的完全爆炸和热核逃逸。在过去的二十年里，出现了一类亮度介于新星和超新星之间的恒星爆发--中等亮度红色瞬变(ILRT)。伊万诺娃等人。(P.433)提出，这些ILRT是常见包络事件的特征，在这些事件中，近双星系统中的低质量恒星被从更大质量和更演化的伴星转移来的物质吞没。一个模型表明，恒星爆发的中间类别是近双星中两颗恒星相互作用的结果。共同包络事件(CEES)是指两颗恒星暂时围绕同一包层运行，被认为是形成大范围近距离双星的关键因素。几十年来，基于无法以其他方式解释的系统的存在，唯一能证明Ces确实存在的证据是间接的。在这里，我们提出了一个来自物理模型的CEE的直接观测特征，在该物理模型中，当物质冷却时，从CEE中弹出的物质的发射由复合前沿控制。这个模型的自然时标和能量范围，以及预期的颜色、光曲线形状、抛射速度和事件率，都与最近发现的一类红色瞬变爆发相匹配。
When Stars Get Too Close Stellar outbursts used to come in two classes: supernovae and novae, the complete explosions and the thermonuclear runaways on the surface of evolved stars, respectively. Over the past two decades a class of stellar outbursts emerged with luminosities between those of novae and supernovae—intermediate-luminosity red transients (ILRTs). Ivanova et al. (p. 433) propose that these ILRTs are the signature of common envelope events in which a lower-mass star in a close binary system is engulfed by matter transferred from its more massive and more evolved companion star. A model suggests that an intermediate class of stellar outbursts results from interaction between two stars in a close binary. Common-envelope events (CEEs), during which two stars temporarily orbit within a shared envelope, are believed to be vital for the formation of a wide range of close binaries. For decades, the only evidence that CEEs actually occur has been indirect, based on the existence of systems that could not be otherwise explained. Here we propose a direct observational signature of CEEs arising from a physical model where emission from matter ejected in a CEE is controlled by a recombination front as the matter cools. The natural range of time scales and energies from this model, as well as the expected colors, light-curve shapes, ejection velocities, and event rate, match those of a recently recognized class of red transient outbursts.
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影响因子：
56.9
作者：
P. Kroupa
通讯作者：
P. Kroupa
影响因子：
64.8
作者：
A. Rest;J. L. Prieto;J. L. Prieto;N. Walborn;Nathan Smith;Federica B. Bianco;Federica B. Bianco;R. Chornock;D. Welch;D. A. Howell;D. A. Howell;M. Huber;R. Foley;W. Fong;B. Sinnott;H. E. Bond;R. C. Smith;I. Toledo;D. Minniti;K. Mandel;K. Mandel
通讯作者：
A. Rest;J. L. Prieto;J. L. Prieto;N. Walborn;Nathan Smith;Federica B. Bianco;Federica B. Bianco;R. Chornock;D. Welch;D. A. Howell;D. A. Howell;M. Huber;R. Foley;W. Fong;B. Sinnott;H. E. Bond;R. C. Smith;I. Toledo;D. Minniti;K. Mandel;K. Mandel
影响因子：
6.5
作者：
F. Boschi;U. Munari
通讯作者：
F. Boschi;U. Munari
DOI：
10.1086/499938
发表时间：
2005-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
James C. Lombardi;Z. Proulx;K. Dooley;E. M. Theriault;Natalia Ivanova;F. Rasio
通讯作者：
James C. Lombardi;Z. Proulx;K. Dooley;E. M. Theriault;Natalia Ivanova;F. Rasio
影响因子：
6.5
作者：
R. Tylenda;M. Hajduk;T. Kamiński;A. Udalski;I. Soszyński;M. Szymański;M. Kubiak;G. Pietrzyński
通讯作者：
R. Tylenda;M. Hajduk;T. Kamiński;A. Udalski;I. Soszyński;M. Szymański;M. Kubiak;G. Pietrzyński