Early multiwavelength analysis of the recurrent nova V745 Sco
Early multiwavelength analysis of the recurrent nova V745 Sco
复制标题
复发性 nova V745 Sco 的早期多波长分析
DOI：
10.1093/mnras/stz2765
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发表时间：
2019
影响因子：
4.8
通讯作者：
M. Hernanz
中科院分区：
文献类型：
--
作者：
L. Delgado;M. Hernanz
近年来，费米/LAT在E>；100 MeV探测到了几次新星爆炸，主要是在爆炸后早期和短时间内。新星中粒子加速的第一个证据是在2006年的RS Oph喷发中发现的，用来解释爆炸波比预期更快的减速。因此，预计高能伽马射线的发射主要来自中性介子衰变和逆康普顿散射。我们的目标是了解新星爆炸中粒子加速时的早期激波演化。为了实现这一目标，我们对2014年爆发的V745 Sco进行了多波长研究，V745 Sco是一种类似于RS Oph的共生经常性新星。在试探性费米探测的同时，对SWIFT/XRT早期观测的分析与Chandra和NuStar的数据相结合，得到了新星喷出物和红巨风演化的全球图景。还汇编了早期的无线电和红外数据，提供了关于前向激波速度及其磁场的信息。与RS Oph的等离子体性质的比较显示出惊人的相似之处，如超新星遗迹中的绝热阶段被跳过，暗示粒子加速。V745Sco的多波长研究为新星中热等离子体的演化及其与星周物质的相互作用提供了新的见解，为理解共生循环新星高能伽马射线发射的本质提供了强有力的工具。
In recent years, several nova explosions have been detected by Fermi/LAT at E > 100 MeV, mainly early after the explosion and for a short period of time. The first evidence of particle acceleration in novae was found in the 2006 eruption of RS Oph to explain the faster than expected deceleration of the blast wave. As a consequence, emission of high-energy gamma-rays mainly from neutral pion decay and inverse Compton scattering is expected. We aim to understand the early shock evolution, when acceleration of particles can take place, in nova explosions. To achieve this goal, we perform a multiwavelength study of the 2014 outburst of V745 Sco, a symbiotic recurrent nova similar to RS Oph. The analysis of early Swift/XRT observations, simultaneous to the tentative Fermi detection, is combined with Chandra and NuStar data, to get a global picture of the nova ejecta and the red giant wind evolution. Early radio and IR data are also compiled, providing information about the forward shock velocity and its magnetic field. The comparison with the plasma properties of RS Oph shows striking similarities, such as the skipping of the adiabatic phase occurring in supernova remnants, a hint of particle acceleration. The multiwavelength study of V745 Sco provides new insights into the evolution of the hot plasma in novae and its interaction with the circumstellar material, a powerful tool to understand the nature of the high-energy gamma-ray emission from symbiotic recurrent novae.
NuSTAR 在 Nova V5855 Sgr 中同时检测 X 射线和伽马射线
DOI：
--
发表时间：
2019
期刊：
The Astrophysical journal
影响因子：
--
作者：
Nelson, Thomas;Mukai, Koji;Li, Kwan-Lok;Vurm, Indrek;Metzger, Brian D.;Chomiuk, Laura;Sokoloski, J. L.;Linford, Justin D.;Bohlsen, Terry;Luckas, Paul
通讯作者：
Luckas, Paul