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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2003
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| Online Access: | https://www.redalyc.org/articulo.oa?id=57101818 |
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Table of Contents:
- An XMM-Newton Observation of the Bright Seyfert 2 Galaxy NGC 6300 A. Nava L. A. Maddox C. Matsumoto K. M. Leighly D. Grupe Física, Astronomía y Matemáticas Rays: GalaxIes Galaxies: Seyfert Galaxies: Individual (NGC 6300) We present preliminary results from an XMM-Newton observation of the bright, nearby (18 Mpc) Seyfert 2 galaxy NGC 6300. We observe difuse soft (0.1-2 keV) X-ray emission extended on a scale of ~ 2 arcmin, corresponding to the scale of the host ring galaxy. Two soft X-ray sources within 80 arcseconds of the nucleus were found. They may be ultraluminous compact X-ray sources, similar to those discovered in other nearby galaxies. The fainter of the two objects corresponds to a source of UV emission observed by the XMM-Newton optical monitor. It also matches a blue compact source in a B band image from the HST. If associated with the galaxy, its 0.2-10 keV luminosity range is 0.7-1.2x1039 erg s-1. The X-ray spectrum of the active nucleusis a rather typical one for a Compton-thin Seyfert 2 galaxy. It consists of a heavily absorbed, strongly-variable hard component dominating the 3-10 keV band, and a soft component dominating the 0.17-2 keV band. In the hard band, the spectrum is well fitted by a power-law model (Γhard ~1.8) seen through a Compton-thin (NH ~ 2.1 x 1023 cm-2) absorber. We confirm the presence of a Kα fluorescence neutral iron line with a centroid at EFe = 6:41 keV and an equivalent width EWFe ~148 eV. The iron line energy may be marginally resolved. The observed ux in the 2-10 keV band is F~9 10-12 ergs cm-2 s-1. The spectrum in the soft band is well fitted by a power-law (Γsoft ~ 1.7), attenuated only by the gas in our Galaxy. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101818 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.18