2017A&A...597A..66G


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.17CEST07:32:09

2017A&A...597A..66G - Astronomy and Astrophysics, volume 597A, 66-66 (2017/1-1)

Direct probe of the inner accretion flow around the supermassive black hole in NGC 2617.

GIUSTINI M., COSTANTINI E., DE MARCO B., SVOBODA J., MOTTA S.E., PROGA D., SAXTON R., FERRIGNO C., LONGINOTTI A.L., MINIUTTI G., GRUPE D., MATHUR S., SHAPPEE B.J., PRIETO J.L. and STANEK K.

Abstract (from CDS):

Aims. NGC 2617 is a nearby (z∼0.01) active galaxy that recently switched from being a Seyfert 1.8 to be a Seyfert 1.0. At the same time, it underwent a strong increase of X-ray flux by one order of magnitude with respect to archival measurements. We characterise the X-ray spectral and timing properties of NGC 2617 with the aim of studying the physics of a changing-look active galactic nucleus (AGN).
Methods. We performed a comprehensive timing and spectral analysis of two XMM-Newton pointed observations spaced by one month, complemented by archival quasi-simultaneous INTEGRAL observations.
Results. We found that, to the first order, NGC 2617 looks like a type 1 AGN in the X-ray band and, with the addition of a modest reflection component, its continuum can be modelled well either with a power law plus a phenomenological blackbody, a partially covered power law, or a double Comptonisation model. Independent of the continuum adopted, in all three cases a column density of a few 1023cm–2 of neutral gas covering 20-40% of the continuum source is required by the data. Most interestingly, absorption structures due to highly ionised iron have been detected in both observations with a redshift of about 0.1c with respect to the systemic redshift of the host galaxy.
Conclusions. The redshifted absorber can be ascribed to a failed wind/aborted jets component, to gravitational redshift effects, and/or to matter directly falling towards the central supermassive black hole. In either case, we are probing the innermost accretion flow around the central supermassive black hole of NGC 2617 and might be even watching matter in a direct inflow towards the black hole itself.

Abstract Copyright: © ESO, 2017

Journal keyword(s): black hole physics - methods: observational - galaxies: active - galaxies: individual: NGC 2617 - X-rays: galaxies - galaxies: Seyfert

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 Mrk 335 Sy1 00 06 19.5371542746 +20 12 10.617456059   14.19 13.85     ~ 1136 0
2 6dFGS gJ005837.4-360605 Sy1 00 58 37.3829859140 -36 06 04.950912106   14.9 14.90 15.0   ~ 82 0
3 NGC 2617 Sy1 08 35 38.7980637155 -04 05 17.902881609   13.6   12.63 13.2 ~ 136 0
4 NGC 3516 Sy1 11 06 47.4596406816 +72 34 07.189563769   13.12 12.40     ~ 1442 0
5 PB 3894 Sy1 12 14 17.6737003918 +14 03 13.182526431   14.46 14.19     ~ 759 0
6 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2463 0
7 CAN 42 ClG 14 47.1 +11 35           ~ 7 0
8 2E 4066 Sy1 18 21 57.2365 +64 20 36.226   14.23 14.24     ~ 548 1
9 Mrk 509 Sy1 20 44 09.7504131334 -10 43 24.724854084   13.35 13.12 10.7   ~ 1159 0

    Equat.    Gal    SGal    Ecl

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2021.06.17-07:32:09

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