2007ApJ...667L.141R

Query : 2007ApJ...667L.141R

2007ApJ...667L.141R - Astrophys. J., 667, L141-L144 (2007/October-1)

On the metallicity dependence of the 24 µm luminosity as a star formation tracer.

RELANO M., LISENFELD U., PEREZ-GONZALEZ P.G., VILCHEZ J.M. and BATTANER E.

Abstract (from CDS):

We investigate the use of the rest-frame 24 µm luminosity as an indicator of the star formation rate (SFR) in galaxies with different metallicities by comparing it to the (extinction-corrected) Hα luminosity. We carry out this analysis in two steps: First, we compare the emission from H II regions in different galaxies with metallicities between 12+log(O/H)=8.1 and 8.9. We find that the 24 µm and the extinction-corrected Hα luminosities from individual H II regions follow the same correlation for all galaxies, independent of their metallicity. Second, the role of metallicity is explored further for the integrated luminosity in a sample of galaxies with metallicities in the range of 12+log(O/H)=7.2-9.1. For this sample we compare the 24 µm and Hα luminosities integrated over the entire galaxies and find a lack of the 24 µm emission for a given Hα luminosity for low-metallicity objects, likely reflecting a low dust content. These results suggest that the 24 µm luminosity is a good metallicity-independent tracer for the SFR in individual H II regions. On the other hand, metallicity has to be taken into account when using the 24 µm luminosity as a tracer for the SFR of entire galaxies.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: ISM - Infrared: Galaxies

Simbad objects: 46

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Number of rows : 46
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 23 AG? 00 09 53.411 +25 55 25.46   12.5       ~ 313 3
2 NGC 633 EmG 01 36 23.418 -37 19 17.64   13.50   12.50   ~ 93 1
3 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1241 3
4 NGC 1705 Sy2 04 54 13.4661493464 -53 21 39.471592428 12.32 12.96 12.56 12.58 12.9 ~ 662 1
5 UGC 3351 Sy2 05 45 47.836 +58 42 03.83   16.0       ~ 101 2
6 NGC 2369 Sy1 07 16 37.753 -62 20 37.51   13.23   11.56 12.3 ~ 130 0
7 NGC 2388 GiG 07 28 53.4535009080 +33 49 08.554343196   14.7       ~ 135 2
8 NGC 2537 AG? 08 13 14.643 +45 59 23.25 12.18 12.50 11.69 11.66   ~ 301 2
9 LEDA 2790884 bCG 08 25 55.5166210656 +35 32 31.833368556   18.2       ~ 120 1
10 Mrk 116 PaG 09 34 02.1 +55 14 25           ~ 1104 1
11 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4447 3
12 NGC 3110 Sy1 10 04 02.0 -06 28 29   13.4   13.3 12.5 ~ 174 3
13 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 848 2
14 IC 2574 AG? 10 28 23.6148831408 +68 24 43.440012756 11.70 11.07 10.87 10.74   ~ 664 1
15 UGC 6456 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 335 1
16 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 978 4
17 NAME NGC 3690 West GiP 11 28 31.02 +58 33 40.7   11.8       ~ 629 4
18 NAME NGC 3690 East AGN 11 28 33.07 +58 33 54.2   11.8       ~ 631 4
19 Mrk 1450 H2G 11 38 35.6552554896 +57 52 26.636623644   15.5       ~ 121 1
20 ESO 320-30 EmG 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 186 1
21 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 965 1
22 ESO 380-27 H2G 12 25 46.95 -36 14 00.7   17.47   16.52   ~ 100 1
23 LEDA 42639 G 12 42 11.394 +33 45 32.76   14.5       ~ 13 0
24 NGC 4670 AG? 12 45 17.150 +27 07 31.76   12.6 12.90     ~ 259 0
25 Mrk 59 AGN 12 59 00.288 +34 50 42.45           ~ 317 2
26 NGC 4861 H2G 12 59 02.340 +34 51 33.98   12.90 12.32     ~ 383 2
27 MCG-02-33-098 AG? 13 02 19.5 -15 46 05   14       ~ 89 0
28 IC 860 LIN 13 15 03.51 +24 37 07.8   14.8       ~ 217 0
29 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 474 1
30 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4329 4
31 NGC 5653 H2G 14 30 10.4187147048 +31 12 55.568509596   12.7       ~ 174 1
32 NGC 5734 Sy2 14 45 09.0364267176 -20 52 13.484556696   13.75   12.08   ~ 81 1
33 Mrk 829 GiP 14 50 56.495 +35 34 18.27   14.5 14.83     ~ 209 0
34 IC 4518A Sy2 14 57 41.18 -43 07 55.6   16.64   13.74   ~ 116 0
35 IC 4518B G 14 57 43.1 -43 07 48   17       ~ 12 0
36 NGC 5936 H2G 15 30 00.846 +12 59 21.55   13.0       ~ 167 1
37 IRAS 17138-1017 Sy2 17 16 35.83992 -10 20 38.9832   17.43   14.59   ~ 131 0
38 IC 4687 AGN 18 13 39.829 -57 43 31.25   14.35 14.3 12.78   ~ 136 1
39 IC 4734 GiG 18 38 25.6846404504 -57 29 25.078201116   14.21   12.71   ~ 85 0
40 NGC 6701 AG? 18 43 12.429 +60 39 12.13   12.9       ~ 133 1
41 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
42 NGC 7130 Sy2 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 450 0
43 IC 5179 Sy1 22 16 09.1191653256 -36 50 37.117603752   12.29 11.89 11.38   ~ 204 1
44 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2095 3
45 NGC 7591 SyG 23 18 16.2727927344 +06 35 09.108933504   13.8       ~ 269 0
46 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 338 4

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