2011A&A...528A.124C


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.20CEST21:50:27

2011A&A...528A.124C - Astronomy and Astrophysics, volume 528A, 124-124 (2011/4-1)

Galaxy evolution and star formation efficiency at 0.2 < z < 0.6.

COMBES F., GARCIA-BURILLO S., BRAINE J., SCHINNERER E., WALTER F. and COLINA L.

Abstract (from CDS):

We present the results of a CO line survey of 30 galaxies at moderate redshift (z ∼0.2-0.6), with the IRAM 30 m telescope, with the goal to follow galaxy evolution and in particular the star formation efficiency (SFE) as defined by the ratio between far-infrared luminosity and molecular gas mass (LFIR/M(H2)). The sources are selected to be ultra-luminous infra-red galaxies (ULIRGs), with LFIR larger than 2.8x1012L, experiencing starbursts; adopting a low ULIRG CO-to-H2 conversion factor, their gas consumption time-scale is lower than 108yr. To date only very few CO observations exist in this redshift range that spans nearly 25% of the universe's age. Considerable evolution of the star formation rate is already observed during this period. 18 galaxies out of our sample of 30 are detected (of which 16 are new detections), corresponding to a detection rate of 60%. The average CO luminosity for the 18 galaxies detected is L'CO=2x1010K.km/s.pc2, corresponding to an average H2 mass of 1.6x1010M. The FIR luminosity correlates well with the CO luminosity, in agreement with the correlation found for low and high redshift ULIRGs. Although the conversion factor between CO luminosity and H2 mass is uncertain, we find that the maximum amount of gas available for a single galaxy is quickly increasing as a function of redshift. Using the same conversion factor, the SFEs for z∼0.2-0.6 ULIRGs are found to be significantly higher, by a factor 3, than for local ULIRGs, and are comparable to high redshift ones. We compare this evolution to the expected cosmic H2 abundance and the cosmic star formation history.

Abstract Copyright:

Journal keyword(s): galaxies: high-redshift - galaxies: ISM - galaxies: starburst - radio lines: galaxies

Simbad objects: 33

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Number of rows : 33

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 IRAS F00235+1024 G 00 26 06.651 +10 41 26.57           ~ 24 0
2 ZwCl 0024+1652 ClG 00 26 36.0 +17 08 36     18.35     ~ 610 1
3 IRAS 00302+3625 G 00 32 57.6 +36 41 55           ~ 5 0
4 IRAS F00415-0737 IR 00 44 05.6 -07 21 13           ~ 5 0
5 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2595 2
6 [VV2006] J015328.3+260940 QSO 01 53 28.2617093467 +26 09 39.212551823           ~ 9 0
7 6dFGS gJ020412.4-005348 G 02 04 12.426 -00 53 51.59   18.90   17.64   ~ 5 0
8 IRAS F02115+0226 G 02 14 10.34 +02 39 59.7   19.88       ~ 9 0
9 FIRST J074810.5+334327 G 07 48 10.591 +33 43 27.13           ~ 8 0
10 IRAS 08081+2611 FIR 08 11 12.3 +26 02 22           ~ 2 0
11 2MASS J09134545+4056282 Sy2 09 13 45.4949162350 +40 56 28.214305677   19.69 19.21     ~ 238 2
12 LEDA 165552 LIN 10 12 16.4 +46 49 42       22.20   ~ 37 0
13 FF J1018+3649 BiC 10 18 34.578 +36 49 51.47           ~ 9 0
14 [VV96] J102434.5+470911 Sy1 10 24 34.5 +47 09 11     20.5     ~ 475 0
15 LEDA 1888605 LIN 12 00 46.836 +30 04 14.19           ~ 30 0
16 2MASX J12054771+1651085 LIN 12 05 47.714 +16 51 08.50   18.758   17.327   ~ 54 0
17 2XMM J125400.8+101112 Sy2 12 54 00.8204 +10 11 12.550   19.03 18.27     ~ 46 0
18 2MASS J13070066+2338050 QSO 13 07 00.6301637661 +23 38 05.146042957   20.81 19.92 19.37   ~ 25 0
19 IRAS 13279+3401 QSO 13 30 15.2480 +33 46 29.545     17.20     ~ 23 0
20 IRAS 13352+6402 G 13 36 50.986 +63 47 03.94           ~ 19 0
21 LEDA 84042 Sy2 13 40 14.4 +33 24 44   18.927       ~ 14 0
22 LEDA 84047 EmG 13 47 05.5 +28 18 03           ~ 9 0
23 2MASSI J1404388+432707 Sy1 14 04 38.7982068124 +43 27 07.453977673   16.12 15.76     ~ 117 0
24 LEDA 165630 Sy2 14 09 31.257 +05 11 31.31     17.00     ~ 67 0
25 SDSS J145658.42+333710.1 G 14 56 58.423 +33 37 10.19           ~ 1 0
26 LEDA 84663 G 15 30 41.1 +63 09 40           ~ 9 0
27 LEDA 165690 LIN 16 32 21.378 +15 51 45.50   18.72 18.06     ~ 52 1
28 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1585 2
29 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 494 1
30 2E 4066 Sy1 18 21 57.2365 +64 20 36.226   14.23 14.24     ~ 548 1
31 2MASS J19014449+8441243 Sy1 19 01 44.4898379954 +84 41 24.365248308     16.2     ~ 14 0
32 LEDA 166698 G 20 57 19.7 +24 53 37           ~ 7 0
33 LEDA 2817352 G 23 13 54.5 +03 30 54           ~ 5 0

    Equat.    Gal    SGal    Ecl

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2021.06.20-21:50:27

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