Chandra observations of the X-ray narrow-line region in NGC 4151

被引：108

作者：

Ogle, PM ^{[1
]}

Marshall, HL ^{[1
]}

Lee, JC ^{[1
]}

Canizares, CR ^{[1
]}

机构：

[1] MIT, Ctr Space Res, Cambridge, MA 02139 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 545卷 / 02期

基金：

美国国家航空航天局;

关键词：

galaxies : individual (NGC 4151); galaxies : Seyfert; X-rays : galaxies;

D O I：

10.1086/317890

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first high-resolution X-ray spectrum of the Seyfert 1.5 galaxy NGC 4151. Observations with the Chandra High-Energy Transmission Grating Spectrometer reveal a spectrum dominated by narrow emission lines from a spatially resolved (1.6 kpc), highly ionized nebula. The X-ray narrow-line region is composite, consisting of both photoionized and collisionally ionized components. The X-ray emission lines have similar velocities, widths, and spatial extent to the optical emission lines, showing that they arise in the same region. The clouds in the narrow-line region must contain a large range of ionization states in order to explain both the optical and X-ray photoionized emission. Chandra data give the first direct evidence of X-ray line emission from a hot plasma (T similar to 10(7) K) that may provide pressure confinement for the cooler (T = 3 x 10(4) K) photoionized clouds.

引用

页码：L81 / L84

页数：4

共 18 条

[1] Hydrogen-like ion emission in the spectra of low-mass X-ray binaries [J].