论文标题
RS OPH 2021爆发的流出震动，用X射线光栅观察到
Shocks in the outflow of the RS Oph 2021 eruption observed with X-ray gratings
论文作者
论文摘要
观察到2021年共生复发的Nova RS OPH的爆发，在光学最大值后Chandra高能量传输光栅（HETG）在第18天，XMM-Newton及其反射光谱仪（RGS）在第21天，在SuperSoft X射线源出现之前，当时是X-Ray soss exted exted the Supies the Exussion the Exuss the Exuss the Exuss the Exted the Exted the Exted the Exted the Persive exted Exta eigta。 HETG 1.3-31 Angstrom范围中吸收的通量为2.6 x 10（-10）ERG/cm（-2）/s，比同一日期测得的伽马射线频道低三个数量级。光谱在碰撞电离平衡中充分拟合了两个热等离子体的成分，一个在温度〜0.75 keV中，另一个在2.5-3.4 keV范围内在温度下。使用RGS，我们测量了5-35 Angstrom范围内的平均通量1.53 x 10（-10）ERG/cm（-2）/s，但是连续体中的通量，尤其是在23-35 Angstrom范围内的线路中，在50 ks RGS暴露期间，在50 ks RGS的暴露期间降低了近10％，表明小时时间尺度的短期可变性。 RGS频谱可以分别配备三个热组件，在70至150 eV，0.64 KeV和2.4 keV之间的血浆温度下。曝光后的最大限度时期落在2006年第14天和第26天在2006年爆发中观察到的两个光栅光谱之间的时期：它们与相似的光谱演化一致，但在2021年，冷却似乎更快。铁在太阳值方面被耗尽，而氮的增强。
The 2021 outburst of the symbiotic recurrent nova RS Oph was observed with the Chandra High Energy Transmission Gratings (HETG) on day 18 after optical maximum and with XMM-Newton and its Reflection Grating Spectrographs (RGS) on day 21, before the supersoft X-ray source emerged and when the emission was due to shocked ejecta. The absorbed flux in the HETG 1.3-31 Angstrom range was 2.6 x 10(-10) erg/cm(-2)/s, three orders of magnitude lower than the gamma-ray flux measured on the same date. The spectra are well fitted with two components of thermal plasma in collisional ionization equilibrium, one at a temperature ~0.75 keV, and the other at temperature in the 2.5-3.4 keV range. With the RGS we measured an average flux 1.53 x 10(-10) erg/cm(-2)/s in the 5-35 Angstrom range, but the flux in the continuum and especially in the lines in the 23-35 Angstrom range decreased during the 50 ks RGS exposure by almost 10%, indicating short term variability on hours' time scale. The RGS spectrum can be fitted with three thermal components, respectively at plasma temperature between 70 and 150 eV, 0.64 keV and 2.4 keV. The post-maximum epochs of the exposures fall between those of two grating spectra observed in the 2006 eruption on days 14 and 26: they are consistent with a similar spectral evolution, but in 2021 cooling seems to have been more rapid. Iron is depleted in the ejecta with respect to solar values, while nitrogen is enhanced.
