2015A&A...578A..48C


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.14CET04:03:29

2015A&A...578A..48C - Astronomy and Astrophysics, volume 578A, 48-48 (2015/6-1)

Understanding the two-dimensional ionization structure in luminous infrared galaxies. A near-IR integral field spectroscopy perspective.

COLINA L., PIQUERAS LOPEZ J., ARRIBAS S., RIFFEL R., RIFFEL R.A., RODRIGUEZ-ARDILA A., PASTORIZA M., STORCHI-BERGMANN T., ALONSO-HERRERO A. and SALES D.

Abstract (from CDS):

We investigate the two-dimensional excitation structure of the interstellar medium (ISM) in a sample of luminous infrared galaxies (LIRGs) and Seyferts using near-IR integral field spectroscopy. This study extends to the near infrared the well-known optical and mid-IR emission line diagnostics used to classify activity in galaxies. Based on the spatially resolved spectroscopy of prototypes, we identify in the [FeII]1.64µm/Brγ-H22.12µm/Brγ plane regions dominated by the different heating sources, i.e. active galactic nuclei (AGNs), young main-sequence massive stars, and evolved stars i.e. supernovae. The ISM in LIRGs occupy a wide region in the near-IR diagnostic plane from -0.6 to +1.5 and from -1.2 to +0.8 (in log units) for the [FeII]/Brγ and H2/Brγ line ratios, respectively. The corresponding median(mode) ratios are +0.18(0.16) and +0.02(-0.04). Seyferts show on average larger values by factors ∼2.5 and ∼1.4 for the [FeII]/Brγ and H2/Brγ ratios, respectively. New areas and relations in the near-IR diagnostic plane are defined for the compact, high surface brightness regions dominated by AGN, young ionizing stars, and supernovae explosions, respectively. In addition to these high surface brightness regions, the diffuse regions affected by the AGN radiation field cover an area similar to that of Seyferts, but with high values in [FeII]/Brγ that are not as extreme. The extended, non-AGN diffuse regions cover a wide area in the near-IR diagnostic diagram that overlaps that of individual excitation mechanisms (i.e. AGN, young stars, and supernovae), but with its mode value to that of the young star-forming clumps. This indicates that the excitation conditions of the extended, diffuse ISM are likely due to a mixture of the different ionization sources, weighted by their spatial distribution and relative flux contribution. The integrated line ratios in LIRGs show higher excitation conditions i.e. towards AGNs, than those measured by the spatially resolved spectroscopy. If this behaviour is representative, it would have clear consequences when classifying high-z, star-forming galaxies based on their near-infrared integrated spectra.

Abstract Copyright:

Journal keyword(s): galaxies: general - galaxies: evolution - galaxies: starburst - galaxies: structure - galaxies: Seyfert - infrared: galaxies

Simbad objects: 26

goto Full paper

goto View the reference in ADS

Number of rows : 26

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 NGC 591 Sy2 01 33 31.2334491603 +35 40 05.621946090   14.71 13.90     ~ 183 2
2 NGC 693 GiC 01 50 30.847 +06 08 42.76 13.39 13.24 12.44     ~ 97 2
3 Mrk 1066 Sy2 02 59 58.5970307633 +36 49 13.808979663   14.89 13.96     ~ 316 1
4 UGC 2855 H2G 03 48 20.731 +70 07 58.37   14.6       ~ 121 2
5 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1139 3
6 NGC 1730 G 04 59 31.877 -15 49 25.28   13   11.98   ~ 16 0
7 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5495 4
8 IC 443 SNR 06 18 02.7 +22 39 36           ~ 1075 1
9 ESO 428-14 Sy2 07 16 31.2067043371 -29 19 28.898984517   13.28 13.52 11.61   ~ 203 4
10 NGC 2369 GiG 07 16 37.753 -62 20 37.51   13.23   11.56 12.3 ~ 110 0
11 Mrk 79 Sy1 07 42 32.8212778143 +49 48 34.787882233   14.74 14.27     ~ 612 1
12 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5239 6
13 NGC 3110 H2G 10 04 02.124 -06 28 29.12   13.4   13.3 12.5 ~ 140 3
14 NGC 3256 IG 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 736 2
15 ESO 320-30 H2G 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 146 1
16 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3318 2
17 ESO 267-30 G 12 14 12.839 -47 13 43.42   14.20   12.69 12.9 ~ 64 0
18 M 61 Sy2 12 21 54.9275149050 +04 28 25.588335799 10.07 10.18 9.65     ~ 853 2
19 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5671 0
20 Mrk 59 AGN 12 59 00.288 +34 50 42.45           ~ 309 2
21 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 415 1
22 LEDA 59990 H2G 17 16 35.7 -10 20 38   15.53       ~ 107 0
23 IC 4687 AGN 18 13 39.829 -57 43 31.25   14.35 14.3 12.78   ~ 114 1
24 NGC 7130 AGN 21 48 19.490 -34 57 04.73   12.86 13.87 11.57   ~ 376 0
25 IC 5179 EmG 22 16 09.1156883076 -36 50 37.102745221   12.29 11.89 11.38   ~ 171 1
26 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 307 4

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...578A..48C and select 'bookmark this link' or equivalent in the popup menu


2019.12.14-04:03:29

© Université de Strasbourg/CNRS

    • Contact