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Issue A&A
Volume 386, Number 2, May I 2002
Page(s) 472 - 486
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20020311



A&A 386, 472-486 (2002)
DOI: 10.1051/0004-6361:20020311

The peculiar small-scale X-ray morphology of NGC 5846 observed with $\vec{Chandra}$

G. Trinchieri1 and P. Goudfrooij2

1  Osservatorio Astronomico di Brera, via Brera 28, 20121 Milano, Italy
2  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA

(Received 15 January 2001 / Accepted 19 February 2002)

Abstract
The excellent quality of the Chandra observation of NGC 5846 reveals a complex X-ray morphology of the central regions of this galaxy. An intriguing morphological similarity between the X-ray and the optical line emission, discovered before using ROSAT HRI images (Trinchieri et al. 1997), is confirmed here in unprecedented detail. Complex spectral characteristics are associated with the morphological peculiarities, indicating a possibly turbulent gas in this object. A population of ~40 individual sources is also observed, with Lx in the range ~ $3 \times 10^{38}{-}2 \times 10^{39}$  erg s -1, with an X-ray luminosity function that is steeper in the high-luminosity end than in other early-type galaxies.


Key words: galaxies: individual: NGC 5846 -- X-rays: galaxies

Offprint request: G. Trinchieri, ginevra@brera.mi.astro.it

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