2015A&A...581A..79W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST18:05:48

2015A&A...581A..79W - Astronomy and Astrophysics, volume 581A, 79-79 (2015/9-1)

Anatomy of the AGN in NGC 5548. V. A clear view of the X-ray narrow emission lines.

WHEWELL M., BRANDUARDI-RAYMONT G., KAASTRA J.S., MEHDIPOUR M., STEENBRUGGE K.C., BIANCHI S., BEHAR E., EBRERO J., CAPPI M., COSTANTINI E., DE MARCO B., DI GESU L., KRISS G.A., PALTANI S., PETERSON B.M., PETRUCCI P.-O., PINTO C. and PONTI G.

Abstract (from CDS):

Our consortium performed an extensive multi-wavelength campaign of the nearby Seyfert 1 galaxy NGC5548 in 2013-14. The source appeared unusually heavily absorbed in the soft X-rays, and signatures of outflowing absorption were also present in the UV. He-like triplets of neon, oxygen and nitrogen, and radiative recombination continuum (RRC) features were found to dominate the soft X-ray spectrum due to the low continuum flux. Here we focus on characterising these narrow emission features using data obtained from the XMM-Newton RGS (770ks stacked spectrum). We use spex for our initial analysis of these features. Self-consistent photoionisation models from Cloudy are then compared with the data to characterise the physical conditions of the emitting region.Outflow velocity discrepancies within the OVII triplet lines can be explained if the X-ray narrow-line region (NLR) in NGC5548 is absorbed by at least one of the six warm absorber components found by previous analyses. The RRCs allow us to directly calculate a temperature of the emitting gas of a few eV (∼104K), favouring photoionised conditions. We fit the data with a Cloudy model of logξ=1.45±0.05erg.cm/s, logNH=22.9±0.4cm–2 and logvturb=2.25±0.5km/s for the emitting gas; this is the first time the X-ray NLR gas in this source has been modelled so comprehensively. This allows us to estimate the distance from the central source to the illuminated face of the emitting clouds as 13.9±0.6pc, consistent with previous work.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies - galaxies: Seyfert - quasars: emission lines - quasars: individual: NGC5548

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 - 2020
#notes
1 Mrk 335 Sy1 00 06 19.5371542746 +20 12 10.617456059   14.19 13.85     ~ 1093 0
2 NGC 424 Sy2 01 11 27.6374462713 -38 05 00.404099901   13.76 14.12 12.38 12.8 ~ 274 0
3 NGC 863 Sy1 02 14 33.5610949475 -00 46 00.180128181   14.48 13.81 17.9   ~ 572 0
4 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1524 2
5 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1137 0
6 NGC 4051 Sy1 12 03 09.6098828919 +44 31 52.693714606   11.08 12.92 9.94   ~ 1992 1
7 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3380 2
8 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2393 0
9 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1888 3

    Equat.    Gal    SGal    Ecl

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2020.07.14-18:05:48

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