Please use this identifier to cite or link to this item:
|Title:||Suzaku observation of the Phoenix galaxy||Authors:||Matt, Giorgio
ACTIVE GALACTIC NUCLEI
SEYFERT 2 GALAXIES
|Issue Date:||Mar-2009||Publisher:||EDP Sciences||Abstract:||Context. In recent years, several Seyfert 2 galaxies have beendiscovered that change state when observed in X-rays a few years apart,switching from Compton-thin to reflection-dominated or viceversa.Aims. We observed a member of this class of "Changing-look" sources,the Phoenix galaxy, with Suzaku, with the aim of better understandingthe nature of the variations.Methods. The Suzaku spectrum was analyzed, and the results comparedwith previous ASCA and XMM-Newton observations.Results. The source was caught in a Compton-thin state, as inXMM-Newton, but differently from ASCA. Comparing the Suzaku andXMM-Newton observations, a variation in the column density of theabsorber on a time scale of years is discovered. A similar change, buton much shorter time scales (i.e. ks) may also explain the count-ratevariations during the Suzaku observations. A soft excess is alsopresent, likely due to continuum and line emission from photoionizedcircumnuclear matter.||URI:||http://hdl.handle.net/2307/286||ISSN:||0004-6361||DOI:||10.1051/0004-6361/200811049|
|Appears in Collections:||A - Articolo su rivista|
X_Dipartimento di Fisica 'Edoardo Amaldi'
Show full item record Recommend this item
Files in This Item:
|suzakuobservationsphoenix.pdf||173.47 kB||Adobe PDF||View/Open|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.