2014ApJ...790..132D


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.28CET13:50:31

2014ApJ...790..132D - Astrophys. J., 790, 132 (2014/August-1)

Some like it hot: linking diffuse X-ray luminosity, baryonic mass, and star formation rate in compact groups of galaxies.

DESJARDINS T.D., GALLAGHER S.C., HORNSCHEMEIER A.E., MULCHAEY J.S., WALKER L.M., BRANDT W.N., CHARLTON J.C., JOHNSON K.E. and TZANAVARIS P.

Abstract (from CDS):

We present an analysis of the diffuse X-ray emission in 19 compact groups (CGs) of galaxies observed with Chandra. The hottest, most X-ray luminous CGs agree well with the galaxy cluster X-ray scaling relations in LX-T and LX-σ, even in CGs where the hot gas is associated with only the brightest galaxy. Using Spitzer photometry, we compute stellar masses and classify Hickson CGs 19, 22, 40, and 42, and RSCGs 32, 44, and 86 as fossil groups using a new definition for fossil systems that includes a broader range of masses. We find that CGs with total stellar and H I masses ≳ 1011.3 M are often X-ray luminous, while lower-mass CGs only sometimes exhibit faint, localized X-ray emission. Additionally, we compare the diffuse X-ray luminosity against both the total UV and 24 µm star formation rates of each CG and optical colors of the most massive galaxy in each of the CGs. The most X-ray luminous CGs have the lowest star formation rates, likely because there is no cold gas available for star formation, either because the majority of the baryons in these CGs are in stars or the X-ray halo, or due to gas stripping from the galaxies in CGs with hot halos. Finally, the optical colors that trace recent star formation histories of the most massive group galaxies do not correlate with the X-ray luminosities of the CGs, indicating that perhaps the current state of the X-ray halos is independent of the recent history of stellar mass assembly in the most massive galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: groups: general - X-rays: galaxies

Simbad objects: 34

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Number of rows : 34

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 HCG 100 CGG 00 01 19.783 +13 07 21.81           ~ 55 0
2 Mrk 935 G 00 01 45.250 +13 06 02.00   15.5       ~ 16 0
3 HCG 7 CGG 00 39 15.9 +00 53 17   11.4       ~ 80 0
4 RSCG 4 CGG 00 42 49.5 -23 33 11           ~ 5 0
5 RSCG 15 CGG 01 52 41.4 +36 08 46           ~ 7 0
6 RSCG 17 CGG 01 56 21.9 +05 38 36           ~ 6 0
7 HCG 16 CGG 02 09 42.710 -10 11 01.36           ~ 154 0
8 HCG 22 CGG 03 03 31 -15 40.5           ~ 67 0
9 HCG 30 CGG 04 36.5 -02 49           ~ 40 0
10 HCG 31 CGG 05 01 37 -04 15.4           ~ 122 0
11 HCG 37 CGG 09 13 35.6 +30 00 51           ~ 58 0
12 SN 2006jc SN* 09 17 20.78 +41 54 32.7     13.8     SN.Ib-n 258 1
13 RSCG 31 CGG 09 17 25 +41 58.1           ~ 6 0
14 MLCG 1482 CGG 09 19 44.582 +33 44 39.51           ~ 7 0
15 ACO 779 ClG 09 19 48.0 +33 45 32           ~ 236 0
16 MCG-01-25-008 GiG 09 38 53.471 -04 50 55.32   14.09   12.18   ~ 56 0
17 APG 321 IG 09 38 54 -04 51.1   15       ~ 79 0
18 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5257 6
19 HCG 42 CGG 10 00 13.1 -19 38 24           ~ 95 0
20 NGC 3091 BiC 10 00 14.125 -19 38 11.32   12.04 10.61 10.56 9.25 ~ 157 0
21 NGC 3096 GiG 10 00 33.1198503321 -19 39 42.954460076   14.08 13.09 13.03 11.75 ~ 41 0
22 HCG 51 CGG 11 22 21.6 +24 19 41   14.9       ~ 76 0
23 HCG 54 CGG 11 29 15 +20 34.7           ~ 49 0
24 HCG 59 CGG 11 48 27 +12 43.0           ~ 48 0
25 NAME North Polar Spur ISM 12 00 +00.0           ~ 299 1
26 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 290 0
27 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4134 2
28 NGC 5353 GiP 13 53 26.7 +40 16 59   11.8   10.57   ~ 240 1
29 HCG 68 CGG 13 53 40.9 +40 19 07     12.4     ~ 107 0
30 HCG 79 CGG 15 59 11.605 +20 45 24.66           ~ 102 0
31 HCG 90 CGG 22 02 06.3 -31 55 48           ~ 123 0
32 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 375 1
33 HCG 97 CGG 23 47 24.0 -02 19 08           ~ 92 0
34 HCG 31r G ~ ~           ~ 3 0

    Equat.    Gal    SGal    Ecl

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2020.01.28-13:50:31

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