Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 478, Issue 4, Pages 5651-5662Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty1436
Keywords
accretion, accretion discs; galaxies: Seyfert; galaxies: active; galaxies: individual: NGC 2992
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Funding
- European Union Seventh Framework Programme (FP7/2007-2013) [312789]
- Italian Space Agency [ASI/INAF I/037/12/0-011/13, ASI-INAF I/037/12/0]
- European Union's Horizon 2020 research and innovation programme under the Marie Skllodowska-Curie grant [664931]
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The Seyfert 2 galaxy NGC 2992 has been monitored eight times by XMM-Newton in 2010 and then observed again in 2013, while in 2015 it was simultaneously targeted by Swift and NuSTAR. XMM-Newton always caught the source in a faint state (2-10 keV fluxes ranging from 0.3 to 1.6 x 10(-11) erg cm(-2) s(-1)), but NuSTAR showed an increase in the 2-10 keV flux up to 6 x 10(-11) erg cm(-2) s(-1). We find possible evidence of an Ultra Fast Outflow with velocity upsilon(1) = 0.21 +/- 0.01c (detected at about 99 per cent confidence level) in such a flux state. The UFO in NGC 2992 is consistent with being ejected at a few tens of gravitational radii only at accretion rates greater than 2 per cent of the Eddington luminosity. The analysis of the low-flux 2010/2013 XMM data allowed us to determine that the Iron K alpha emission line complex in this object is likely the sum of three distinct components: a constant, narrow one due to reflection from cold, distant material (likely the molecular torus); a narrow, but variable one which is more intense in brighter observations and a broad relativistic one emitted in the innermost regions of the accretion disc, which has been detected only in the 2003 XMM observation.
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