Primordial gravastar from inflation

Primordial gravastar from inflation
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暴胀造成的原始格拉瓦星

DOI:
10.1016/j.physletb.2019.06.036
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发表时间:
2018-10
期刊:
Phys.Lett. B795 (2019) 314-318
影响因子:
--
通讯作者:
Piao Yun-Song
Piao Yun-Song
中科院分区:
其他
文献类型:
--
作者:
Wang Yu-Tong;Cai Yong;Piao Yun-Song

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de Sitter(dS)泡在膨胀过程中可以自发成核,并在宇宙膨胀过程中被拉伸到天体物理尺度。我们报告了一个新的现象,一些这样的泡沫可能会发展成重力星(超紧凑的对象与dS核心)后,通货膨胀,见证了通货膨胀的发生,并可能生存到今天。有人指出,如果这样的原始星星参与了LIGO/Virgo事件之一,合并后的物体最终将坍缩成黑洞。因此,晚期引力波振铃波形将呈现出一系列间隔随时间增加的“回波”。
The de Sitter (dS) bubbles can nucleate spontaneously during inflation, and will be stretched by the cosmological expansion to astrophysical scale. We report on a novel phenomenon that some of such bubbles might develop into the gravastar (the ultra-compact object with a dS core) after inflation, which witnessed the occurrence of inflation and might survive till today. It is pointed out that if such a primordial star was involved in one of the LIGO/Virgo events, the post-merger object will eventually collapse into a black hole. As a result, the late-time gravitational wave ringdown waveform will exhibit a series of “echoes” with intervals increasing with time.
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