1999A&A...349...88K


Query : 1999A&A...349...88K

1999A&A...349...88K - Astronomy and Astrophysics, volume 349, 88-96 (1999/9-1)

X-ray properties of LINERs.

KOMOSSA S., BOEHRINGER H. and HUCHRA J.P.

Abstract (from CDS):

We present an investigation of the X-ray properties of 13 LINERs based on ROSAT all-sky survey and pointed PSPC and HRI observations. Several sources are studied for the first time in X-rays. The X-ray spectra are best described by a powerlaw with photon index Γx≃-2.0 or thermal emission from gas with very subsolar abundances. The luminosities range between logLx=37.7 (NGC 404) and 40.8 (NGC 4450). No X-ray variability on the timescale of hours/days is detected. This is in line with the suggestion that LINERs may accrete in the advection-dominated mode. On a longer term, one of the objects, NGC 2768, turns out to be slightly variable. Some sources appear to be extended at weak emission levels whereas the bulk of the X-ray emission is consistent with arising from a point source within the PSPC instrumental resolution. Lx/LB ratios are derived and emission mechanisms that potentially contribute to the observed X-ray luminosities are discussed. We also examine the presence of second X-ray sources near the target sources both in terms of instrumental effects and in terms of `real' sources within the LINER galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: fundamental parameters - galaxies: ISM - galaxies: nuclei - X-rays: galaxies

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 404 LIN 01 09 27.1 +35 43 05   12.56 11.73     ~ 439 0
2 NGC 1167 LIN 03 01 42.3322774176 +35 12 20.300948892   13.84 12.77     ~ 324 2
3 UGC 2489 GiC 03 01 51.4 +35 50 23           ~ 172 1
4 NGC 2768 SyG 09 11 37.504 +60 02 13.95 11.30 10.84 9.87     ~ 483 2
5 NGC 3642 LIN 11 22 17.9010437568 +59 04 28.275641436   14.86 14.04     ~ 195 0
6 NGC 3898 LIN 11 49 15.370 +56 05 03.66   11.7       ~ 284 1
7 NGC 4036 LIN 12 01 26.7603659808 +61 53 44.625848784   12.18 11.20     ~ 246 0
8 NGC 4419 LIN 12 26 56.4505296720 +15 02 50.688833388 12.42 12.08 11.16     ~ 380 2
9 NGC 4450 LIN 12 28 29.5910654016 +17 05 05.976112020   10.90 10.08     ~ 532 2
10 M 94 SyG 12 50 53.0737971432 +41 07 12.900884628 9.15 8.96 8.24 7.78   ~ 1302 2
11 NGC 5390 LIN 13 55 39.9385716624 +40 27 42.380606592   12.81 11.93 10.04   ~ 334 1
12 NGC 5675 Sy2 14 32 39.8305629840 +36 18 07.969905252   14.0       ~ 100 1
13 NGC 5851 LIN 15 06 53.3823437112 +12 51 31.291992072   14.9       ~ 53 0
14 NGC 6500 LIN 17 55 59.7825728688 +18 20 17.642346648   13.43 12.54     ~ 214 0
15 IC 1481 Sy1 23 19 25.0863724296 +05 54 21.836715048   14.5       ~ 88 1

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2022.05.22-01:35:34

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