2020ApJ...888...92L

Query : 2020ApJ...888...92L

2020ApJ...888...92L - Astrophys. J., 888, 92-92 (2020/January-2)

Star-forming clumps in local luminous infrared galaxies.

LARSON K.L., DIAZ-SANTOS T., ARMUS L., PRIVON G.C., LINDEN S.T., EVANS A.S., HOWELL J., CHARMANDARIS V., U V., SANDERS D.B., STIERWALT S., BARCOS-MUNOZ L., RICH J., MEDLING A., COOK D., OKLOPCIC A., MURPHY E.J. and BONFINI P.

Abstract (from CDS):

We present HST narrowband near-infrared imaging of Paα and Paβ emission of 48 local luminous infrared galaxies (LIRGs) from the Great Observatories All-Sky LIRG Survey. These data allow us to measure the properties of 810 spatially resolved star-forming regions (59 nuclei and 751 extranuclear clumps) and directly compare their properties to those found in both local and high-redshift star-forming galaxies. We find that in LIRGs the star-forming clumps have radii ranging from ∼90 to 900 pc and star formation rates (SFRs) of ∼1 x 10–3 to 10 M☉ yr–1, with median values for extranuclear clumps of 170 pc and 0.03 M☉ yr–1. The detected star-forming clumps are young, with a median stellar age of 8.7 Myr, and have a median stellar mass of 5 x 105 M☉. The SFRs span the range of those found in normal local star-forming galaxies to those found in high-redshift star-forming galaxies at z = 1-3. The luminosity function of the LIRG clumps has a flatter slope than found in lower-luminosity, star-forming galaxies, indicating a relative excess of luminous star-forming clumps. In order to predict the possible range of star-forming histories and gas fractions, we compare the star-forming clumps to those measured in the MassiveFIRE high-resolution cosmological simulation. The star-forming clumps in MassiveFIRE cover the same range of SFRs and sizes found in the local LIRGs and have total gas fractions that extend from 10% to 90%. If local LIRGs are similar to these simulated galaxies, we expect that future observations with ALMA will find a large range of gas fractions, and corresponding star formation efficiencies, among the star-forming clumps in LIRGs.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Interacting galaxies - Star-forming regions - Luminous infrared galaxies

VizieR on-line data: <Available at CDS (J/ApJ/888/92): table1.dat table3.dat>

Simbad objects: 52

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Number of rows : 52
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 23 AGN 00 09 53.411 +25 55 25.46   12.5       ~ 331 2
2 MCG-02-01-051 Sy2 00 18 50.898 -10 22 36.49   14.81 14.33     ~ 154 3
3 MCG+12-02-001 AG? 00 54 03.943 +73 05 05.23   16       ~ 120 1
4 NGC 633 EmG 01 36 23.418 -37 19 17.64   13.50   12.50   ~ 101 1
5 IC 214 AGN 02 14 05.53344 +05 10 23.8692   14.4       ~ 157 0
6 Z 553-7 AGN 02 24 07.9838118384 +47 58 10.747047684   15.7       ~ 94 1
7 IRAS 02438+2122 AGN 02 46 39.192 +21 35 09.38   16.0       ~ 79 0
8 IRAS 03217+4023 AGN 03 25 05.3343453936 +40 33 30.822573924           ~ 54 0
9 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
10 NVSS J040232+602040 rG 04 02 32.098 +60 20 37.79           ~ 46 1
11 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
12 LEDA 17035 AGN 05 16 56.091 +51 31 56.17           ~ 44 0
13 MCG+10-09-002 Sy2 05 45 47.836 +58 42 03.83   16.0       ~ 110 2
14 NGC 2369 Sy1 07 16 37.753 -62 20 37.51   13.23   11.56 12.3 ~ 137 0
15 NGC 2388 AGN 07 28 53.4535009080 +33 49 08.554343196   14.7       ~ 145 2
16 Z 58-9 GiG 07 35 43.416 +11 42 35.29   15.0       ~ 79 1
17 LEDA 90088 AGN 08 37 01.827 -49 54 30.27           ~ 67 0
18 NGC 3110 Sy1 10 04 02.12400 -06 28 29.1250   13.4   13.3 12.5 ~ 191 2
19 IC 2545 Sy1 10 06 04.581 -33 53 05.55   15.27 14.27 14.25   ~ 117 0
20 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
21 MCG-06-26-013 EmG 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 203 1
22 NGC 4922N Sy2 13 01 25.2660290577 +29 18 49.879144069   15.60 14.67 13.85   ~ 265 5
23 MCG-02-33-098 AG? 13 02 19.5 -15 46 05   14       ~ 96 0
24 IC 860 LIN 13 15 03.51 +24 37 07.8   14.8       ~ 236 0
25 2MASX J13150638-5509225 Sy2 13 15 06.33480 -55 09 22.7736   17.3       ~ 172 0
26 IC 883 SBG 13 20 35.37960 +34 08 21.8400   14.8       ~ 421 1
27 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 500 1
28 NGC 5257 H2G 13 39 52.92781 +00 50 24.0903   13.7 12.99     ~ 208 0
29 NGC 5258 GiP 13 39 57.6768310848 +00 49 51.009668076   13.8 12.83     ~ 186 0
30 NGC 5331 GiP 13 52 16.289 +02 06 04.18           ~ 97 0
31 NGC 5734 Sy2 14 45 09.0364267176 -20 52 13.484556696   13.75   12.08   ~ 89 1
32 MCG+04-35-018 GiP 14 57 00.3205510752 +24 36 24.138336996   14.3 15.3     ~ 83 0
33 UGC 9618 IG 14 57 01.0 +24 36 41           ~ 127 0
34 IC 4518 Sy2 14 57 45.6 -43 07 58   14.5       ~ 81 0
35 ESO 99-4 G 15 24 58.217 -63 07 34.43   16.4       ~ 51 0
36 NGC 5936 AGN 15 30 00.846 +12 59 21.55   13.0       ~ 179 1
37 NGC 6090 PaG 16 11 40.3 +52 27 21   14.0       ~ 446 1
38 IRAS 16164-0746 Sy1 16 19 11.792 -07 54 02.61   15.49       ~ 88 1
39 LEDA 58817 Sy1 16 42 40.1747908920 -09 43 18.848119476   16.77       ~ 106 1
40 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
41 IRAS 17138-1017 Sy2 17 16 35.83992 -10 20 38.9832   17.43   14.59   ~ 143 0
42 IC 4686 AG? 18 13 38.7810951072 -57 43 57.306382932   14.67   13.52   ~ 71 1
43 IC 4687 AGN 18 13 39.829 -57 43 31.25   14.35 14.3 12.78   ~ 143 2
44 IC 4734 AGN 18 38 25.6846404504 -57 29 25.078201116   14.21   12.71   ~ 95 0
45 NGC 6701 AGN 18 43 12.429 +60 39 12.13   12.9       ~ 142 1
46 NGC 6786 Sy2 19 10 53.928 +73 24 36.20   13.7       ~ 80 1
47 NGC 7130 Sy2 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 483 1
48 IC 5179 Sy1 22 16 09.1191653256 -36 50 37.117603752   12.29 11.89 11.38   ~ 214 1
49 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
50 NGC 7591 SyG 23 18 16.2727927344 +06 35 09.108933504   13.8       ~ 285 1
51 NVSS J234605+531359 rG 23 46 05.7217380192 +53 13 56.609577840           ~ 60 1
52 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 350 3

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