2006A&A...454..447T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST05:51:05

2006A&A...454..447T - Astronomy and Astrophysics, volume 454, 447-452 (2006/8-1)

Searching for X-ray luminous ``normal'' galaxies in 2dFGRS.

TZANAVARIS P., GEORGANTOPOULOS I. and GEORGAKAKIS A.

Abstract (from CDS):

We cross-correlated the Chandra XASSIST and XMM-Newton Serendipitous Source Catalogues with the 2 degree Field Galaxy Redshift Survey (2dFGRS) database. Our aim was to identify the most X-ray luminous (LX>1042erg/s) examples of galaxies in the local Universe whose X-ray emission is dominated by stellar processes rather than AGN activity (``normal'' galaxies), as well as to test the empirical criterion log(fX/fO)←2 for separating AGN from NGs. We also performed a similar search in two nearby-galaxy samples from the literature. With XMM-Newton (Chandra) we covered an area of ∼8.2 (∼5.8) deg2 down to a flux limit of ∼10–15 (∼1.6x10–15) erg/cm2/s. We classified 2dFGRS spectra using emission-line intensity ratios. We found 18 (20) 2dFGRS galaxies with XMM-Newton (Chandra), which constitute our XMM-Newton-2dFGRS (Chandra-2dFGRS) correlation sample. We classified 6 2dFGRS spectra as star-forming, HII nuclei, and 2 spectra as possible HII nuclei. The rest of the objects are absorption-line galaxies and AGN, including 3 possible LINERs. No luminous ``normal'' galaxies have been found, but out of 19 ``normal'' galaxies in this sample, 5 HII and 3 absorption-line galaxies have log(fX/fO)>-2. Furthermore, all 44 galaxies in the first literature sample have log(fX/fO)←2 and LX<1042erg/s. In the second literature sample, out of a total of 170 ``normal'' galaxies, we found 16 galaxies with log(fX/fO)>-2, the majority of which are massive ellipticals. Three of these have LX>1042erg/s. We found no luminous ``normal'' galaxies in our XMM-Newton- 2dFGRS and Chandra- 2dFGRS correlation samples. We found three such galaxies in the second literature sample. Considering all samples, we find that the log(fX/fO)←2 criterion seems to select primarily against the brightest, massive ellipticals.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies - galaxies: starburst - galaxies: active

Simbad objects: 40

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Number of rows : 40

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 2MASX J00555128-2726064 G 00 55 51.289 -27 26 06.42   19.186   19.117   ~ 1 0
2 2dFGRS TGS211Z082 G 00 56 51.78 -27 28 56.3   18.980   18.901   ~ 1 0
3 2MASX J00581848-3555443 G 00 58 18.4575598432 -35 55 44.655619954   18.076   18.014   ~ 2 0
4 2dFGRS TGS212Z026 G 00 58 24.4732022571 -27 29 22.844338574   16.30 15.58     ~ 9 0
5 2MASX J02571400-3318272 G 02 57 14.0452746827 -33 18 27.361104770   18.021   17.934   ~ 2 0
6 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1812 1
7 2MASX J03324676-2742122 EmG 03 32 46.7705309993 -27 42 12.342074473   17.378 16.63 16.260 15.65 ~ 31 0
8 Mrk 1261 AGN 10 43 52.5763946750 -01 17 40.264861359   15.00 14.25     ~ 45 0
9 2dFGRS TGN295Z042 G 10 44 19.91 -01 24 26.7   18.898   18.688   ~ 1 0
10 2MASX J10444501-0120178 G 10 44 45.011 -01 20 17.80   18.938   18.732   ~ 1 0
11 2dFGRS TGN163Z123 G 10 56 48.838 -03 37 25.61   18.678   18.539   ~ 10 0
12 2dFGRS TGN163Z121 G 10 56 50.04 -03 33 42.8   17.832   17.693   ~ 1 0
13 2dFGRS TGN440Z057 G 11 23 20.17 +01 38 09.9   18.814   18.660   ~ 1 0
14 2dFGRS TGN448Z020 G 11 51 29.69 +01 48 31.7   18.887   18.804   ~ 1 0
15 2dFGRS TGN243Z240 LIN 11 55 45.420 -01 41 30.13   19.092   19.000   ~ 2 0
16 NGC 4073 BiC 12 04 27.059 +01 53 45.65   13.8 13.21 14.249   ~ 182 1
17 2dFGRS TGN318Z209 LIN 12 15 53.2807343087 -00 36 07.285705234   18.076   17.996   ~ 6 0
18 2MASX J12160165-0037336 ALS 12 16 01.652 -00 37 33.65   17.782   17.701   ~ 6 0
19 2MASX J12280760+0202524 G 12 28 07.6385811903 +02 02 51.972726838   18.561   18.480   ~ 4 0
20 2dFGRS TGN387Z056 G 12 28 17.8194470634 +02 12 28.682142781   18.936   18.857   ~ 4 0
21 2dFGRS TGN387Z032 BiC 12 28 58.444 +02 11 27.19   16.716   16.636   ~ 5 0
22 2dFGRS TGN388Z113 G 12 29 47.2757518046 +01 54 02.811416577   19.115   19.038   ~ 4 0
23 NAME Chandra Deep Field-North reg 12 36.8 +62 13           ~ 610 0
24 2dFGRS TGN071Z177 G 12 49 02.23 -05 49 33.8   18.448   18.343   ~ 1 0
25 2dFGRS TGN266Z089 G 13 31 39.59 -01 48 26.2   18.389   18.234   ~ 1 0
26 NVSS J134428+000143 rG 13 44 28.3355530233 +00 01 46.731267091   16.7       ~ 10 0
27 2MASX J13445288+0005205 Sy1 13 44 52.9094182767 +00 05 20.294391880   18.20 17.77     ~ 38 0
28 2dFGRS TGN275Z203 Sy1 14 12 34.6747211424 -00 35 00.030046961   18.06 17.58 18.161   ~ 29 0
29 2dFGRS TGN206Z127 G 14 12 49.69 -03 07 19.7   18.342   18.091   ~ 1 0
30 2XMM J215106.2-302427 AGN 21 51 06.0788729892 -30 24 27.423783019   18.944   18.834   ~ 2 0
31 2MASX J22013613-3153240 AGN 22 01 36.1569352884 -31 53 24.033387458   18.164 18.41 18.055 17.31 ~ 8 0
32 2MASS J22215117-2445307 AGN 22 21 51.17 -24 45 30.7   19.201   19.077   ~ 1 0
33 NGC 7313 G 22 35 32.571 -26 06 06.32   15.00   14.40   ~ 11 0
34 2dFGRS TGS924Z253 AGN 22 52 28.2 -17 49 16   19.43   17.60   ~ 4 0
35 2XMM J225231.6-174632 EmG 22 52 31.6183266944 -17 46 32.132186124   18.586   18.441   ~ 2 0
36 2E 4728 LIN 23 25 19.731 -12 07 27.51   15.45 15.46     ~ 169 2
37 [VV2006] J235139.4-260503 QSO 23 51 39.4295 -26 05 03.179   18.093 17.10 18.003   ~ 13 0
38 2dFGRS TGS549Z357 GiG 23 56 10.72 -34 49 42.1   18.791   18.731   ~ 1 0
39 2dFGRS TGS548Z244 ALS 23 56 27.68 -34 35 35.8   15.579   15.520   ~ 1 0
40 2dFGRS TGS432Z052 G 23 58 27.21 -32 41 03.3   19.267   19.201   ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-05:51:05

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