千新星作为引力波源的电磁对应体
高能天体物理现象
2017-10-18 v2
摘要
引力波随着双黑洞并合的探测而被发现，预计在较低质量的中子星并合中也能被探测到。预测表明，这些并合会抛射富含重放射性同位素的物质，这些同位素可为称为千新星的电磁信号提供能量。引力波源 GW170817 源于邻近宇宙中的双中子星并合，其天空位置和距离估计相对受限。在此，我们报告对星系 NGC4993 中一个快速衰减的电磁暂现源的观测与物理建模，该暂现源在空间上与 GW170817 及一个弱短伽马射线暴重合。该暂现源的物理参数与双中子星并合产生蓝色千新星的理论预测大致吻合。其发出的电磁辐射可用 的抛射质量来解释，不透明度为 ，速度为 。功率源的功率律斜率被限制为 ，与 r-过程核素的放射性供能一致。我们在光谱中识别出与轻 r-过程元素（）一致的谱线特征。随着衰减，该暂现源迅速变红，其发射可能包含来自具有更高不透明度、富镧系元素抛射物组分的贡献。这表明中子星并合产生引力波、放射性供能的千新星，并且是 r-过程元素的核合成来源。
引用
@article{arxiv.1710.05841,
title = {A kilonova as the electromagnetic counterpart to a gravitational-wave source},
author = {S. J. Smartt and T. -W. Chen and A. Jerkstrand and M. Coughlin and E. Kankare and S. A. Sim and M. Fraser and C. Inserra and K. Maguire and K. C. Chambers and M. E. Huber and T. Kruhler and G. Leloudas and M. Magee and L. J. Shingles and K. W. Smith and D. R. Young and J. Tonry and R. Kotak and A. Gal-Yam and J. D. Lyman and D. S. Homan and C. Agliozzo and J. P. Anderson and C. R. Angus C. Ashall and C. Barbarino and F. E. Bauer and M. Berton and M. T. Botticella and M. Bulla and J. Bulger and G. Cannizzaro and Z. Cano and R. Cartier and A. Cikota and P. Clark and A. De Cia and M. Della Valle and L. Denneau and M. Dennefeld and L. Dessart and G. Dimitriadis and N. Elias-Rosa and R. E. Firth and H. Flewelling and A. Flors and A. Franckowiak and C. Frohmaier and L. Galbany and S. Gonzalez-Gaitan and J. Greiner and M. Gromadzki and A. Nicuesa Guelbenzu and C. P. Gutierrez and A. Hamanowicz and L. Hanlon and J. Harmanen and K. E. Heintz and A. Heinze and M. -S. Hernandez and S. T. Hodgkin and I. M. Hook and L. Izzo and P. A. James and P. G. Jonker and W. E. Kerzendorf and S. Klose and Z. Kostrzewa-Rutkowska and M. Kowalski and M. Kromer and H. Kuncarayakti and A. Lawrence and T. B. Lowe and E. A. Magnier and I. Manulis and A. Martin-Carrillo and S. Mattila and O. McBrien and A. Muller and J. Nordin and D. O'Neill and F. Onori and J. T. Palmerio and A. Pastorello and F. Patat and G. Pignata and Ph. Podsiadlowski and M. L. Pumo and S. J. Prentice and A. Rau and A. Razza and A. Rest and T. Reynolds and R. Roy and A. J. Ruiter and K. A. Rybicki and L. Salmon and P. Schady and A. S. B. Schultz and T. Schweyer and I. R. Seitenzahl and M. Smith and J. Sollerman and B. Stalder and C. W. Stubbs and M. Sullivan and H. Szegedi and F. Taddia and S. Taubenberger and G. Terreran and B. van Soelen and J. Vos and R. J. Wainscoat and N. A. Walton and C. Waters and H. Weiland and M. Willman and P. Wiseman and D. E. Wright and L. Wyrzykowski and O. Yaron},
journal= {arXiv preprint arXiv:1710.05841},
year = {2017}
}
备注
Nature, in press, DOI 10.1038/nature24303. Data files will be made available at http://www.pessto.org