The weak absorbing outflow in AGN Mrk 279: Evidence of supersolar metal abundances
Por:
Fields D.L., Mathur S., Krongold Y., Williams R., Nicastro F.
Publicada:
1 ene 2007
Resumen:
We present analysis and photoionization modeling of the Chandra high-resolution spectrum of Mrk 279. There is clear evidence of an absorbing outflow that is best fit by a two-component model: one with a low-ionization parameter and one with a higher ionization parameter. The column density of the X-ray warm absorber, about log NH = 20, is the smallest known of all active galactic nuclei (AGNs) in which X-ray absorbing outflows are observed. We find that the X-ray and UV/FUV absorbers are part of the same overall outflow. There is some evidence of supersolar carbon, nitrogen, oxygen, and iron in the Chandra spectrum of Mrk 279. While this is not a robust result in itself, Chandra data in combination with the UV data and the pressure equilibrium between two phases of the outflow, support the scenario of supersolar abundances. This is the first case in which supersolar abundances are reported in the nucleus of a normal Seyfert galaxy. The data suggest that the outflow originates from a compact region around the nuclear black hole and that it carries insignificant amounts of mass and energy. © 2007. The American Astronomical Society. All rights reserved.
Filiaciones:
Fields D.L.:
Department of Astronomy, Ohio State University, Columbus, OH 43210, United States
Pierce College, 6201 Winnetka Avenue, Woodland Hills, CA 91371, United States
Mathur S.:
Department of Astronomy, Ohio State University, Columbus, OH 43210, United States
Krongold Y.:
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, United States
Instituto de Astronomía, Universidad Nacional Autónomica de México, Apartado Postal 70-264, 04510 México DF, Mexico
Williams R.:
Department of Astronomy, Ohio State University, Columbus, OH 43210, United States
Leiden Observatory, Leiden University, 2300 RA Leiden, Netherlands
Nicastro F.:
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, United States
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