Magnetically Driven Baryon Winds from Binary Neutron Star Merger Remnants and the Blue Kilonova of 2017 August
Magnetically Driven Baryon Winds from Binary Neutron Star Merger Remnants and the Blue Kilonova of 2017 August
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来自双中子星合并遗迹和 2017 年 8 月蓝色千新星的磁驱动重子风
DOI:
10.3847/2041-8213/abb240
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
J. Kalinani
中科院分区:
文献类型:
--
作者:
R. Ciolfi;J. Kalinani
The observation of a radioactively powered kilonova associated with the first binary neutron star (BNS) merger detected in gravitational waves proved that these events are ideal sites for the production of heavy r-process elements. However, the physical origin of the ejected material responsible for the early (“blue”) and late (“red”) components of this kilonova is still debated. Here, we investigate the possibility that the early/blue kilonova originated from the magnetically driven baryon wind launched after merger by the metastable neutron star remnant. Exploiting a magnetized BNS merger simulation with over 250 ms of post-merger evolution, we can follow for the first time the full mass-ejection process up to its final decline. We find that the baryon wind carries ≃0.010–0.028 M⊙ of unbound material, proving that the high mass estimated for the blue kilonova can be achieved. We also find expansion velocities of up to ∼0.2c, consistent with the lower end of the observational estimates, and we discuss possible effects neglected here that could further increase the final ejecta velocity. Overall, our results show that the magnetically driven baryon wind represents a viable channel to explain the blue kilonova.
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影响因子:
64.8
作者:
Kasen, Daniel;Metzger, Brian;Ramirez-Ruiz, Enrico
通讯作者:
Ramirez-Ruiz, Enrico
DOI:
10.3847/2041-8213/ab5794
发表时间:
2019
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Nedora, Vsevolod;Bernuzzi, Sebastiano;Radice, David;Perego, Albino;Endrizzi, Andrea;Ortiz, Néstor
通讯作者:
Ortiz, Néstor
DOI:
10.3847/2041-8213/aa9c84
发表时间:
2017-10
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
V. Villar;J. Guillochon;E. Berger;B. Metzger;P. Cowperthwaite;M. Nicholl;K. Alexander;P. Blanchard-P.-Blanchar
通讯作者:
V. Villar;J. Guillochon;E. Berger;B. Metzger;P. Cowperthwaite;M. Nicholl;K. Alexander;P. Blanchard-P.-Blanchar
DOI:
10.3847/2041-8205/824/1/l6
发表时间:
2016
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Ruiz, Milton;Lang, Ryan N.;Paschalidis, Vasileios;Shapiro, Stuart L.
通讯作者:
Shapiro, Stuart L.