2008A&A...483..161T


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.07CEST20:29:38

2008A&A...483..161T - Astronomy and Astrophysics, volume 483, 161-169 (2008/5-3)

Tracing a disk wind in NGC 3516.

TURNER T.J., REEVES J.N., KRAEMER S.B. and MILLER L.

Abstract (from CDS):

X-ray spectra of AGN often contain signatures indicative of absorption in multiple layers of gas whose ionization-state and covering fraction may vary with time. It has been unclear to date how much of the observed X-ray spectral and timing behavior in AGN can be attributed to variations in absorption, versus variations in the strengths of emission or reflection components. Diagnostics of the inner regions of AGN cannot be reliably performed until the origin of observed effects is understood. We investigate the role of the X-ray absorbers in the Seyfert 1 galaxy NGC 3516. Time-averaged and flux-selected spectroscopy is used to examine the behavior of NGC 3516 observed in Chandra HETG and XMM data from Oct. 2006. New H-like and He-like emission and absorption features discovered in the Fe K regime reveal a previously unknown zone of circumnuclear gas in NGC 3516 with log ξ∼4.3 and column density ∼1023cm–2. A lower-ionization layer with log ξ∼2 and of similar column density is confirmed from previous observations, this layer has a covering fraction around 50%, and changes in covering provide a simple explanation of a deep dip in the light curve that we interpret as an eclipse of the continuum due to passage of a cloud across the sight line within half a day. These inner zones of absorbing gas are detected to have outflow velocities in the range 1000-2000km/s, this, and constraints on radial location are consistent with an origin as part of a disk wind in NGC 3516.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies - black hole physics - galaxies: Seyfert

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1531 2
2 LB 1727 Sy1 04 26 00.7188445954 -57 12 01.772037544 13.68 14.58 14.37 14.8   ~ 235 0
3 NGC 3516 Sy1 11 06 47.4596406816 +72 34 07.189563769   13.12 12.40     ~ 1420 0
4 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1489 0
5 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3386 2
6 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 932 1
7 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1381 0

    Equat.    Gal    SGal    Ecl

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2020.08.07-20:29:38

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