GINGA observations of three X-ray-luminous early-type galaxies : NGC 4472, NGC 4636, and NGC 3998

GINGA observations of three X-ray-luminous early-type galaxies : NGC 4472, NGC 4636, and NGC 3998
复制标题

GINGA 对三个 X 射线发光早期型星系的观测:NGC 4472、NGC 4636 和 NGC 3998

DOI:
10.1086/169542
复制
发表时间:
1991
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
T. Ohashi
T. Ohashi
中科院分区:
--
文献类型:
--
作者:
H. Awaki;K. Koyama;H. Kunieda;S. Takano;Y. Tawara;T. Ohashi

文献摘要

被引文献

相似文献

介绍了利用 Ginga 卫星对三个 X 射线发光早期型星系 NGC 4472、NGC 4636 和 NGC 3998 进行的观测。 NGC 4472 和 NGC 4636 的 X 射线光谱可以描述为光学薄等离子体的热发射。确定热气体的温度。 NGC 3998 的 X 射线光谱与光子指数为 2.0 的幂律模型很好地拟合,这与 AGN 的典型光谱相同。
Observations of three X-ray luminous early-type galaxies, NGC 4472, NGC 4636 and NGC 3998, with the satellite Ginga, are presented. The X-ray spectra of NGC 4472 and NGC 4636 can be described as thermal emission from an optically thin plasma. The temperatures of the hot gas are determined. The X-ray spectrum of NGC 3998 is well fitted by a power-law model having a photon index of 2.0, the same sort of spectrum typical of AGN.