论文标题

在标准火球和能量喷射模型的框架内的无线电余星解释

Interpretation of Radio Afterglows in the framework of the Standard Fireball and Energy Injection models

论文作者

Levine, Delina, Dainotti, Maria, Fraija, Nissim, Warren, Donald, Chandra, Poonam, Lloyd-Ronning, Nicole

论文摘要

伽玛射线爆发(GRB)是全能的,高能的瞬变,其能量发射机制仍在争论中。可能的解释之一是标准火球模型,可以通过封闭关系(CRS)或GRB的时间和光谱指数之间的关系进行测试。为了测试这些内容,我们编制了从1997年到2020年的广泛的无线电光曲线(LC)样本,这是对GRB的最全面分析,迄今为止无线电观察结果。我们适合来自82个不同GRB的202个LC,其功率定律破裂,获得了26个样本,显示出明显的断裂和14个GRB的子样本,这些grb呈现了无线电高原。我们针对与恒定和缓慢冷一样的恒定密度星际介质(ISM)或出色的风介质相对应的CR测试这些样品,以及三个附加的密度轮廓,$ k = 1、1.5、2.5,$,$ n \ propto r^{ - k} $之后的$ n \ propto r^{ - k} $,并考虑crs crs and noder-novence nover-noter-novernce noters noters Intery noters Intercection。我们发现,在26个GRB(46%)中,有12个(其中7/12)呈现一个无线电高原,在测试的集合中至少满足了一个CR,这表明我们的数据与标准火球模型基本不相容。在满足的CR中,最喜欢的环境是ISM,SC,$ν_M<ν_V<ν_C$,无需能量注入。我们的结果与以前通过无线电中CRS测试标准火球模型的研究一致。

Gamma-Ray Bursts (GRBs) are panchromatic, highly energetic transients whose energy emission mechanism is still debated. One of the possible explanations is the standard fireball model, which can be tested with the closure relations (CRs), or relations between the temporal and spectral indices of a GRB. To test these, we compile an extensive sample of radio afterglow light curves (LCs) that span from 1997 to 2020, the most comprehensive analysis of GRBs with radio observations to date. We fit 202 LCs from 82 distinct GRBs with a broken power law, obtaining a sample of 26 that display a clear break and a subsample of 14 GRBs that present a radio plateau. We test these samples against CRs corresponding to a constant-density interstellar medium (ISM) or a stellar wind medium in both fast- and slow-cooling regimes, as well as three additional density profiles, $k = 1, 1.5, 2.5,$ following $n \propto r^{-k}$ , and consider sets of CRs both with and without energy injection. We find that 12 of the 26 GRBs (46%), of which 7/12 present a radio plateau, fulfill at least one CR in the sets tested, suggesting our data is largely incompatible with the standard fireball model. Of the fulfilled CRs, the most preferred environment is the ISM, SC, $ν_m < ν< ν_c$ without energy injection. Our results are consistent with previous studies that test the standard fireball model via the CRs in radio.

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