2010ApJS..188..447P


Query : 2010ApJS..188..447P

2010ApJS..188..447P - Astrophys. J., Suppl. Ser., 188, 447-472 (2010/June-0)

Local luminous infrared galaxies. I. Spatially resolved observations with the Spitzer infrared spectrograph.

PEREIRA-SANTAELLA M., ALONSO-HERRERO A., RIEKE G.H., COLINA L., DIAZ-SANTOS T., SMITH J.-D.T., PEREZ-GONZALEZ P.G. and ENGELBRACHT C.W.

Abstract (from CDS):

We present results from the Spitzer Infrared Spectrograph spectral mapping observations of 15 local luminous infrared galaxies (LIRGs). In this paper, we investigate the spatial variations of the mid-IR emission which includes fine structure lines, molecular hydrogen lines, polycyclic aromatic features (PAHs), continuum emission, and the 9.7 µm silicate feature. We also compare the nuclear and integrated spectra. We find that the star formation takes place in extended regions (several kpc) as probed by the PAH emission, as well as the [Ne II]12.81 µm and [Ne III]15.56 µm emissions. The behavior of the integrated PAH emission and 9.7 µm silicate feature is similar to that of local starburst galaxies. We also find that the minima of the [Ne III]15.56 µm/[Ne II]12.81 µm ratio tends to be located at the nuclei and its value is lower than that of H II regions in our LIRGs and nearby galaxies. It is likely that increased densities in the nuclei of LIRGs are responsible for the smaller nuclear [Ne III]15.56 µm/[Ne II]12.81 µm ratios. This includes the possibility that some of the most massive stars in the nuclei are still embedded in ultracompact H II regions. In a large fraction of our sample, the 11.3 µm PAH emission appears more extended than the dust 5.5 µm continuum emission. We find a dependency of the 11.3 µm PAH/7.7 µm PAH and [Ne II]12.81 µm/11.3 µm PAH ratios with the age of the stellar populations. Smaller and larger ratios, respectively, indicate recent star formation. The estimated warm (300 K <T< 1000 K) molecular hydrogen masses are of the order of 108 M, which are similar to those found in ULIRGs, local starbursts, and Seyfert galaxies. Finally we find that the [Ne II]12.81 µm velocity fields for most of the LIRGs in our sample are compatible with a rotating disk at ∼kpc scales, and they are in a good agreement with Hα velocity fields.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: starburst - galaxies: structure - infrared: galaxies

Simbad objects: 27

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Number of rows : 27
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 31 G 00 10 38.4041722272 -56 59 11.202173952   14.63   13.63   ~ 18 0
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3160 2
3 NGC 670 GiG 01 47 24.8554037808 +27 53 08.957582736   13.53 12.72     ~ 82 0
4 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A0mA1Va 1479 0
5 NGC 2369 GiG 07 16 37.753 -62 20 37.51   13.23   11.56 12.3 ~ 122 0
6 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5633 6
7 NGC 3110 H2G 10 04 02.124 -06 28 29.12   13.4   13.3 12.5 ~ 159 3
8 NGC 3256 IG 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 805 2
9 IC 694 G 11 28 27.312 +58 34 42.29   18.2       ~ 246 2
10 GSW B1 PoG 11 28 31.0 +58 33 41           ~ 39 1
11 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 943 4
12 ESO 320-30 H2G 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 167 1
13 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 458 1
14 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2737 2
15 IC 4518 Sy2 14 57 45.6 -43 07 58   14.5       ~ 69 0
16 Z 49-57 GiC 15 13 13.1083645344 +07 13 32.099256084   15.5       ~ 223 1
17 IRAS 17138-1017 H2G 17 16 35.83992 -10 20 38.9832   17.43   14.59   ~ 120 0
18 HD 161178 * 17 37 08.8834634616 +72 27 20.858215464   6.886 5.869     G9III 59 0
19 * ksi Dra PM* 17 53 31.7296234 +56 52 21.514262 6.14 4.93 3.75 2.92 2.33 K2III 263 0
20 IC 4686 G 18 13 38.7810951072 -57 43 57.306382932   14.67   13.52   ~ 61 1
21 IC 4687 AGN 18 13 39.829 -57 43 31.25   14.35 14.3 12.78   ~ 128 1
22 NGC 6701 G 18 43 12.429 +60 39 12.13   12.9       ~ 124 1
23 HD 181597 * 19 18 37.8718847472 +49 34 10.037944416   7.442 6.317     K1III 55 0
24 NGC 7130 AGN 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 421 0
25 IC 5179 EmG 22 16 09.1191653256 -36 50 37.117603752   12.29 11.89 11.38   ~ 191 1
26 NGC 7591 SyG 23 18 16.2727927344 +06 35 09.108933504   13.8       ~ 248 0
27 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 326 4

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2022.09.26-09:13:16

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