2015ApJ...800...69G


Query : 2015ApJ...800...69G

2015ApJ...800...69G - Astrophys. J., 800, 69 (2015/February-2)

High-lying OH absorption, [C II] deficits, and extreme LFIR/MH2 ratios in galaxies.

GONZALEZ-ALFONSO E., FISCHER J., STURM E., GRACIA-CARPIO J., VEILLEUX S., MELENDEZ M., LUTZ D., POGLITSCH A., AALTO S., FALSTAD N., SPOON H.W.W., FARRAH D., BLASCO A., HENKEL C., CONTURSI A., VERMA A., SPAANS M., SMITH H.A., ASHBY M.L.N., HAILEY-DUNSHEATH S., GARCIA-BURILLO S., MARTIN-PINTADO J., VAN DER WERF P., MEIJERINK R. and GENZEL R.

Abstract (from CDS):

Herschel/PACS observations of 29 local (ultra)luminous infrared galaxies, including both starburst and active galactic nucleus (AGN) dominated sources as diagnosed in the mid-infrared/optical, show that the equivalent width of the absorbing OH 65 µm Π3/2 J = 9/2-7/2 line (Weq(OH65)) with lower level energy Elow~ 300 K, is anticorrelated with the [C II]158 µm line to far-infrared luminosity ratio, and correlated with the far-infrared luminosity per unit gas mass and with the 60-to-100 µm far-infrared color. While all sources are in the active LIR/MH2> 50L/Mmode as derived from previous CO line studies, the OH65 absorption shows a bimodal distribution with a discontinuity at LFIR/MH2~ 100 L/M. In the most buried sources, OH65 probes material partially responsible for the silicate 9.7 µm absorption. Combined with observations of the OH 71 µm Π1/2J = 7/2-5/2 doublet (Elow~ 415 K), radiative transfer models characterized by the equivalent dust temperature, Tdust, and the continuum optical depth at 100 µm, τ100, indicate that strong [C II]158 µm deficits are associated with far-IR thick (τ100 ≳ 0.7, NH ≳ 1024/cm2), warm (Tdust ≳ 60 K) structures where the OH 65 µm absorption is produced, most likely in circumnuclear disks/tori/cocoons. With their high LFIR/MH2 ratios and columns, the presence of these structures is expected to give rise to strong [C II] deficits. Weq(OH65) probes the fraction of infrared luminosity arising from these compact/warm environments, which is ≳ 30%-50% in sources with high Weq(OH65). Sources with high Weq(OH65) have surface densities of both LIRand MH2higher than inferred from the half-light (CO or UV/optical) radius, tracing coherent structures that represent the most buried/active stage of (circum)nuclear starburst-AGN co-evolution.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: ISM - infrared: galaxies - line: formation

Simbad objects: 36

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Number of rows : 36
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3192 2
2 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4424 2
3 LEDA 17155 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 475 0
4 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 821 0
5 2MASX J07273754-0254540 G 07 27 37.5366009312 -02 54 54.264024396           ~ 53 0
6 NAME IRAS F08572+3915 NW LIN 09 00 25.364 +39 03 54.23     16.66     ~ 405 1
7 2MASX J09041268-3627007 G 09 04 12.689 -36 27 00.76           ~ 77 0
8 UGC 5101 Sy1 09 35 51.6045544584 +61 21 11.589382368   15.20 15.50     ~ 551 4
9 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5676 6
10 LEDA 33083 LIN 10 59 18.128 +24 32 34.74   15.7       ~ 261 1
11 IC 694 G 11 28 27.312 +58 34 42.29   18.2       ~ 248 2
12 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 950 4
13 NAME NGC 3690 East AGN 11 28 33.07 +58 33 54.2   11.8       ~ 629 4
14 GSW A1 PoG 11 28 33.6199 +58 33 46.699           ~ 8 1
15 ESO 320-30 H2G 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 172 1
16 LEDA 39024 LIN 12 13 46.107 +02 48 41.50           ~ 340 1
17 NGC 4355 Sy2 12 26 54.6206739120 -00 52 39.421212996   14.21 13.37     ~ 464 2
18 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1930 3
19 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1398 2
20 2MASX J13150638-5509225 Sy2 13 15 06.383 -55 09 22.60   17.3       ~ 133 0
21 NAME OKM2018 SWIFT J1344.7+5588 Sy2 13 44 42.1883001096 +55 53 13.596220932   15.68 14.91     ~ 883 3
22 LEDA 52270 Sy1 14 37 38.2867288488 -15 00 24.087592692   16.58 16.40     ~ 265 1
23 LEDA 89507 Sy2 14 40 59.0135478768 -37 04 31.938829896   17.72   16.48   ~ 109 0
24 Z 49-57 GiC 15 13 13.1083645344 +07 13 32.099256084   15.5       ~ 226 1
25 2MASX J15265942+3558372 LIN 15 26 59.442 +35 58 37.01   15.61       ~ 262 1
26 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2872 4
27 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1589 2
28 LEDA 60189 LIN 17 23 21.943 -00 17 00.96   15.1       ~ 410 0
29 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13430 0
30 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4041 3
31 NAME Sgr B2 Main Rad 17 47 20.5 -28 23 06           ~ 380 1
32 LEDA 90327 EmG 19 32 22.2962473608 -04 00 01.797249204   18.85   17.04   ~ 101 0
33 ESO 286-19 LIN 20 58 26.8183783008 -42 38 59.411838156   14.79 14.79 14.20   ~ 276 0
34 NAME South America H2G 22 51 49.307 -17 52 23.96   16.97       ~ 314 3
35 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 2027 3
36 LEDA 90429 SyG 23 39 01.274 +36 21 08.77   16.17       ~ 209 1

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2023.01.30-05:54:21

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