Publication Date

2001

Journal or Book Title

The Astrophysical Journal Letters

Abstract

We present a Chandra X-ray observation that shows, unambiguously for the first time, the presence of a giant diffuse X-ray-emitting corona around the edge-on disk galaxy NGC 4631. This corona, with a characteristic thermal temperature of × 106 K, extends as far as 8 kpc away from the galactic plane. The X-ray morphology resembles the radio halo of the galaxy, indicating a close connection between outflows of hot gas, cosmic rays, and the magnetic field from the galactic disk. Enhanced diffuse X-ray emission is apparently enclosed by numerous Hα-emitting loops blistered out from the central disk of the galaxy, as is evident in a comparison with our deep Hubble Space Telescope imaging.

Comments

This is the pre-published version harvested from ArXiv. The published version is located at http://iopscience.iop.org/1538-4357/555/2/L99/

Volume

555

Pages

L99

Issue

2

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