We report on XMM-Newton observations of three nearby galaxy pairs, AM0707-273, AM1211-465, and AM2040-674. All six galaxies were previously classified as HII galaxies based on optical and IR spectroscopic analysis. All galaxies were detected with XMM-Newton and each member was isolated and analyzed independently. The X-ray spectra reveal strong evidence of AGN activity in the NE member of AM1211-465 pair. We measured a luminosity of 1.94(+0.11)(-015) x 10(42) erg/s in the 2-10 keV band and the presence of a neutral FeK alpha line with a confidence level of 98.8%. The high n(H) value, 2.2 +/- 0.2 x 1022 cm(-2), would explain the mis-classification of the source. Marginal evidence of AGN nature was found in the X-ray spectra of AM1211-465SW and AM0707-273E. The X-ray emission of the three remaining galaxies can be explained by starburst activity.
Jimenez-Bailon E, Loiseau N, Guainazzi M, Matt G, Rosa-Gonzalez D, Piconcelli E, et al. (2007). XMM-Newton view of galaxy pairs: activation of quiescent black holes?. ASTRONOMY & ASTROPHYSICS, 469(3), 881-889 [10.1051/0004-6361:20066761].
Titolo: | XMM-Newton view of galaxy pairs: activation of quiescent black holes? | |
Autori: | ||
Data di pubblicazione: | 2007 | |
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Citazione: | Jimenez-Bailon E, Loiseau N, Guainazzi M, Matt G, Rosa-Gonzalez D, Piconcelli E, et al. (2007). XMM-Newton view of galaxy pairs: activation of quiescent black holes?. ASTRONOMY & ASTROPHYSICS, 469(3), 881-889 [10.1051/0004-6361:20066761]. | |
Abstract: | We report on XMM-Newton observations of three nearby galaxy pairs, AM0707-273, AM1211-465, and AM2040-674. All six galaxies were previously classified as HII galaxies based on optical and IR spectroscopic analysis. All galaxies were detected with XMM-Newton and each member was isolated and analyzed independently. The X-ray spectra reveal strong evidence of AGN activity in the NE member of AM1211-465 pair. We measured a luminosity of 1.94(+0.11)(-015) x 10(42) erg/s in the 2-10 keV band and the presence of a neutral FeK alpha line with a confidence level of 98.8%. The high n(H) value, 2.2 +/- 0.2 x 1022 cm(-2), would explain the mis-classification of the source. Marginal evidence of AGN nature was found in the X-ray spectra of AM1211-465SW and AM0707-273E. The X-ray emission of the three remaining galaxies can be explained by starburst activity. | |
Handle: | http://hdl.handle.net/11590/148125 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |