Journal
ASTROPHYSICAL JOURNAL
Volume 545, Issue 2, Pages L81-L84Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/317890
Keywords
galaxies : individual (NGC 4151); galaxies : Seyfert; X-rays : galaxies
Categories
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available