2001A&A...365...11C


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET09:43:47

2001A&A...365...11C - Astronomy and Astrophysics, volume 365, 11-27 (2001/1-2)

Mid and Far IR properties of late-type galaxies in the Coma and A1367 clusters: ISOCAM and ISOPHOT observations.

CONTURSI A., BOSELLI A., GAVAZZI G., BERTAGNA E., TUFFS R. and LEQUEUX J.

Abstract (from CDS):

We present Mid (MIR) and Far (FIR) Infrared observations of 18 spiral/irregular galaxies belonging to the Coma and A1367 clusters, carried out with the CAM and PHOT instruments on board the ISO satellite. Complementary photometry from the UV to the Near Infrared (NIR) together with Hα imaging, HI and 12CO line measurements allow us to study the relationships between the IR emission and the star formation properties of these galaxies. Most of the resolved galaxies show extended MIR emission throughout their disks even where no Hα emission is present. This suggests that the Aromatic carriers can be excited by the general interstellar radiation field (ISRF), i.e. by visible photons. Only close to HII regions the UV photons are the principal sources of Aromatic carrier excitation. However, when the UV radiation field becomes intense enough these carriers can be destroyed. The average integrated 15/6.75µm ratio of the observed galaxies is ∼1, i.e. the typical value for the photodissociation regions (PDRs). This suggests that, despite the high star formation rate (SFR) and the very luminous HII regions of these galaxies, their integrated MIR emission is dominated by PDR-like regions rather than HII-like regions. A cold dust component with average temperature ∼22K exists in most of the target galaxies, probably arising from big dust grains (BGs) in thermal equilibrium with the ISRF. The contribution to the BGs heating from the ionizing stars decreases with increasing wavelength. A warmer dust component whose emission dominates the spectrum between 20 and 100µm is likely to exist. This is probably due to both Very Small Grains (VSGs) and warm BGs emission. The dust to gas ratio of the target galaxies is comparable to that of the solar neighborhood. There is a weak trend between the dust total mass and both the atomic and molecular gas content. The MIR and FIR properties of the analyzed galaxies do not seem to be affected by the environment despite the fact that most of the targets are interacting with the Intra-Cluster-Medium.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: Coma, A 1367 - galaxies: ISM - galaxies: irregular - galaxies: spiral - infrared: galaxies

Simbad objects: 23

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Number of rows : 23

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 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11053 1
2 2MASX J11421476+1958350 GiG 11 42 14.766 +19 58 35.07   15.5   14.67   ~ 66 0
3 LEDA 36382 GiC 11 42 56.450 +19 57 58.37 15.85 16.25   15.27   ~ 89 0
4 2MFGC 9193 GiC 11 43 13.096 +20 00 17.52 15.91 16.52   15.56   ~ 93 0
5 UGC 6697 GiG 11 43 49.078 +19 58 06.46 13.96 14.35 13.59 13.29   ~ 200 2
6 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1000 1
7 2MASX J11454468+2001518 GiG 11 45 44.689 +20 01 51.83   15.5   15.00   ~ 42 0
8 Mrk 53 IG 12 56 06.097 +27 40 41.17   15.5 13.65 14.92   ~ 89 0
9 IC 3913 EmG 12 56 28.589 +27 17 28.49   15.82   14.67   ~ 77 0
10 NGC 4848 AGN 12 58 05.5774186519 +28 14 33.264194270   14.2   13.53   ~ 174 0
11 Mrk 57 EmG 12 58 37.282 +27 10 35.81   15.88   14.82   ~ 97 0
12 2MASX J12594009+2837507 GiC 12 59 40.096 +28 37 50.78   15.6       ~ 51 0
13 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4267 2
14 7W 1258+27W06 EmG 13 00 33.732 +27 38 15.64   15.4       ~ 99 0
15 IC 4040 rG 13 00 37.861 +28 03 28.68 15.13 15.1 14.76 14.708 13.981 ~ 145 0
16 IC 842 GiG 13 00 39.540 +29 01 09.64 14.85 14.72 13.93     ~ 104 1
17 NGC 4911 LIN 13 00 56.0616026595 +27 47 27.151217355 14.58 13.7 13.33 12.601 12.068 ~ 187 0
18 NGC 4921 LIN 13 01 26.1220299719 +27 53 09.631792431   13.7       ~ 176 0
19 2MASX J13042266+2848382 EmG 13 04 22.6820606743 +28 48 38.604489206   15.3 15.09     ~ 63 0
20 MCG+05-31-119 EmG 13 04 26.576 +27 18 16.24   15.5   15.38   ~ 63 0
21 MCG+05-31-133 SBG 13 06 38.141 +28 50 56.12   15.19 14.83 13.15   ~ 71 0
22 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 616 0
23 NGC 7023 RNe 21 01 36.9 +68 09 48           ~ 640 0

    Equat.    Gal    SGal    Ecl

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2020.10.25-09:43:47

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