2002A&A...392..453B


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.29CET10:36:40

2002A&A...392..453B - Astronomy and Astrophysics, volume 392, 453-467 (2002/9-3)

Multi-wavelength study of the Seyfert 1 galaxy NGC 3783 with XMM-Newton.

BLUSTIN A.J., BRANDUARDI-RAYMONT G., BEHAR E., KAASTRA J.S., KAHN S.M., PAGE M.J., SAKO M. and STEENBRUGGE K.C.

Abstract (from CDS):

We present the analysis of multi-wavelength XMM-Newton data from the Seyfert galaxy NGC 3783, including UV imaging, X-ray and UV lightcurves, the 0.2-10keV X-ray continuum, the iron Kα emission line, and high-resolution spectroscopy and modelling of the soft X-ray warm absorber. The 0.2-10keV spectral continuum can be well reproduced by a power-law at higher energies; we detect a prominent Fe Kα emission line, with both broad and narrow components, and a weaker emission line at 6.9keV which is probably a combination of Fe Kβ and FeXXVI. We interpret the significant deficit of counts in the soft X-ray region as being due to absorption by ionised gas in the line of sight. This is demonstrated by the large number of narrow absorption lines in the RGS spectrum from iron, oxygen, nitrogen, carbon, neon, argon, magnesium, silicon and sulphur. The wide range of iron states present in the spectrum enables us to deduce the ionisation structure of the absorbing medium. We find that our spectrum contains evidence of absorption by at least two phases of gas: a hotter phase containing plasma with a log ionisation parameter ξ (where ξ is in erg.cm/s) of 2.4 and greater, and a cooler phase with log ξ centred around 0.3. The gas in both phases is outflowing at speeds of around 800km/s. The main spectral signature of the cold phase is the Unresolved Transition Array (UTA) of M-shell iron, which is the deepest yet observed; its depth requires either that the abundance of iron, in the cold phase, is several times that of oxygen, with respect to solar abundances, or that the absorption lines associated with this phase are highly saturated. The cold phase is associated with ionisation states that would also absorb in the UV.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: Seyfert - galaxies: individual (NGC 3783) - X-rays: galaxies - ultraviolet: galaxies - techniques: spectroscopic

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 - 2020
#notes
1 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4037 2
2 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1464 0
3 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 920 1
4 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1369 0
5 2RE J1337+244 Sy1 13 37 18.7198121988 +24 23 03.320690345     15.0     ~ 353 0
6 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2358 0

    Equat.    Gal    SGal    Ecl

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2020.02.29-10:36:40

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