2005A&A...433L..17H


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.19CEST20:54:47

2005A&A...433L..17H - Astronomy and Astrophysics, volume 433, L17-20 (2005/4-2)

Exceptional H2 emission in the Antennae galaxies: Pre-starburst shocks from the galaxy collision.

HAAS M., CHINI R. and KLAAS U.

Abstract (from CDS):

The collision of gas-rich galaxies is believed to produce strong shocks between their gas clouds which cause the onset of the observed bursts of extended star formation. However, the so far observed shock signatures in colliding galaxies can be explained essentially by winds from already existing massive stars and supernovae and thus do not give any evidence for an outstanding pre-starburst phase. Either pre-starburst gas shocks are too short-lived to be detected or one has to modify our perception of colliding galaxies. A dedicated analysis of ISOCAM-CVF mid-infrared spectral maps led us to the discovery of exceptional H2 v=0-0 S(3) λ=9.66µm line emission from the ``Antennae'' galaxy pair, which is at an early stage of galaxy collision. Its H2 line luminosity, normalized by the far-infrared luminosity, exceeds that of all other known galaxies and the strongest H2 emission is spatially displaced from the known starbursts regions. This implies that most of the excited H2 gas in the Antennae must be shocked due to the collision of the two galaxies. These observations indicate that the outstanding phase of pre-starburst shocks exists, and that they might be a key to our understanding of the formation of the first proto-galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: interacting - galaxies: ISM - galaxies: starburst - galaxies: evolution - galaxies: individual: Antennae

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2857 2
2 IC 1623 IG 01 07 47.2 -17 30 25   15       ~ 254 1
3 NGC 520 IG 01 24 35.071 +03 47 32.68 12.41 12.24 11.42     ~ 480 3
4 UGC 5101 Sy1 09 35 51.694 +61 21 10.52   15.20 15.50     ~ 497 4
5 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5213 6
6 NGC 3256 IG 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 732 2
7 NAME NGC 3690 West GiP 11 28 30.69 +58 33 33.4   11.8       ~ 603 4
8 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 864 4
9 NAME NGC 3690 East AGN 11 28 33.07 +58 33 54.2   11.8       ~ 608 4
10 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1263 1
11 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1532 0
12 NGC 4039 GiP 12 01 53.8 -18 53 06   11.08   9.77   ~ 1124 1
13 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1736 3
14 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1229 2
15 Mrk 273 Sy2 13 44 42.070 +55 53 13.17   15.68 14.91     ~ 814 3
16 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2620 4
17 NGC 6090 PaG 16 11 40.3 +52 27 21   14.0       ~ 390 2
18 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1443 2
19 NGC 7552 GiP 23 16 10.767 -42 35 05.39 11.34 11.22 10.57 10.08 11.1 ~ 489 3

    Equat.    Gal    SGal    Ecl

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2019.10.19-20:54:47

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