2014MNRAS.439.3016M

Query : 2014MNRAS.439.3016M

2014MNRAS.439.3016M - Mon. Not. R. Astron. Soc., 439, 3016-3021 (2014/April-2)

The soft-X-ray emission of Ark 120. XMM-Newton, NuSTAR, and the importance of taking the broad view.

MATT G., MARINUCCI A., GUAINAZZI M., BRENNEMAN L.W., ELVIS M., LOHFINK A., AREVALO P., BOGGS S.E., CAPPI M., CHRISTENSEN F.E., CRAIG W.W., FABIAN A.C., FUERST F., HAILEY C.J., HARRISON F.A., PARKER M., REYNOLDS C.S., STERN D., WALTON D.J. and ZHANG W.W.

Abstract (from CDS):

We present simultaneous XMM-Newton and NuSTAR observations of the `bare' Seyfert 1 galaxy, Ark 120, a system in which ionized absorption is absent. The NuSTAR hard-X-ray spectral coverage allows us to constrain different models for the excess soft-X-ray emission. Among phenomenological models, a cutoff power law best explains the soft-X-ray emission. This model likely corresponds to Comptonization of the accretion disc seed UV photons by a population of warm electrons: using Comptonization models, a temperature of ∼ 0.3 keV and an optical depth of ∼ 13 are found. If the UV-to-X-ray optxagnf model is applied, the UV fluxes from the XMM-Newton Optical Monitor suggest an intermediate black hole spin. Contrary to several other sources observed by NuSTAR, no high-energy cutoff is detected with a lower limit of 190 keV.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): accretion, accretion discs - galaxies: active - galaxies: individual: Ark 120

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
2 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
3 MCG-05-23-016 Sy2 09 47 40.1332188528 -30 56 55.960779696   14.10 13.69 12.44   ~ 611 0
4 MCG-06-30-015 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1559 0
5 IC 4329A Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 876 1
6 IRAS 21262+5643 Sy1 21 27 45.3941483856 +56 56 34.915920720       16.6   ~ 186 0

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