An extended XMM-Newton observation of the Seyfert galaxy NGC 4051 - II. Soft X-ray emission from a limb-brightened shell of post-shock gas

Details An extended XMM-Newton observation of the Seyfert galaxy NGC 4051 - II. Soft X-ray emission from a limb-brightened shell of post-shock gas An extended XMM-Newton observation of the Seyfert galaxy NGC 4051 - II. Soft X-ray emission from a limb-brightened shell of post-shock gas

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.415.2379p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 415, Issue 3, pp. 2379-2387.

Astronomy and Astrophysics

Astronomy

2

Galaxies: Active, Galaxies: General, Galaxies: Individual: Ngc 4051, Galaxies: Seyfert, X-Rays: Galaxies

Scientific paper

An extended XMM-Newton observation of the Seyfert 1 galaxy NGC 4051 in 2009 revealed a complex absorption spectrum, with a wide range of outflow velocities and ionization states. The main velocity and ionization structure was interpreted in Paper I in terms of a decelerating, recombining flow resulting from the shocking of a still higher velocity wind colliding with the interstellar medium or slower moving ejecta. The high sensitivity of the XMM-Newton observation also revealed a number of broad emission lines, all showing evidence of self-absorption near the line cores. The line profiles are found here to be consistent with emission from a limb-brightened shell of post-shock gas building up ahead of the contact discontinuity. While the broad emission lines remain quasi-constant as the continuum flux changes by an order of magnitude, recombination continua of several H- and He-like ions are found to vary in response to the continuum, providing an important key to scaling the ionized flow.

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