2015ApJ...802...81M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST15:36:32

2015ApJ...802...81M - Astrophys. J., 802, 81 (2015/April-1)

High-J CO sleds in nearby infrared bright galaxies observed by Herschel/PACS.

MASHIAN N., STURM E., STERNBERG A., JANSSEN A., HAILEY-DUNSHEATH S., FISCHER J., CONTURSI A., GONZALEZ-ALFONSO E., GRACIA-CARPIO J., POGLITSCH A., VEILLEUX S., DAVIES R., GENZEL R., LUTZ D., TACCONI L., VERMA A., WEISS A., POLISENSKY E. and NIKOLA T.

Abstract (from CDS):

We report the detection of far-infrared (FIR) CO rotational emission from nearby active galactic nuclei (AGNs) and starburst galaxies, as well as several merging systems and Ultra-Luminous Infrared Galaxies (ULIRGs). Using the Herschel Photodetector Array Camera and Spectrometer (PACS), we have detected transitions in the Jupp= 14-30 range. The PACS CO data obtained here provide the first reference of well-sampled FIR extragalactic CO spectral line energy distributions (SLEDs) for this range. We find a large range in the overall SLED shape, even among galaxies of similar type, demonstrating the uncertainties in relying solely on high-J CO diagnostics to characterize the excitation source of a galaxy. Combining our data with low-J line intensities taken from the literature, we present a CO ratio-ratio diagram and discuss its value in distinguishing excitation sources and physical properties of the molecular gas. The position of a galaxy on such a diagram is less a signature of its excitation mechanism, than an indicator of the presence of warm, dense molecular gas. We then quantitatively analyze the CO emission from a subset of the detected sources with single-component and two-component large velocity gradient (LVG) radiative transfer models to fit the CO SLEDs. From these fits we derive the molecular gas mass and the corresponding CO-to-H2 conversion factor, αCO, for each respective source. For the ULIRGs we find α values in the canonical range 0.4- 5M(K km/s pc2)–1, while for the other objects, α varies between 0.2 and 14. Finally, we compare our best-fit LVG model results with previous studies of the same galaxies and comment on any differences.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: ISM - galaxies: starburst

Simbad objects: 35

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Number of rows : 35

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3016 2
2 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4193 2
3 2MASX J05210136-2521450 Sy2 05 21 01.3987198411 -25 21 45.269338983   15.47 14.75     ~ 441 0
4 2MASX J07273754-0254540 G 07 27 37.5366759821 -02 54 54.258142847           ~ 43 0
5 NAME IRAS F08572+3915 NW LIN 09 00 25.364 +39 03 54.23     16.66     ~ 370 1
6 2MASX J09041268-3627007 G 09 04 12.689 -36 27 00.76           ~ 67 0
7 UGC 5101 Sy1 09 35 51.599 +61 21 11.33   15.20 15.50     ~ 519 4
8 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5446 6
9 2XMM J105918.1+243234 LIN 10 59 18.128 +24 32 34.74   15.7       ~ 243 1
10 IC 694 G 11 28 27.312 +58 34 42.29   18.2       ~ 240 2
11 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 908 4
12 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1287 1
13 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1581 0
14 NGC 4039 GiP 12 01 53.8 -18 53 06   11.08   9.77   ~ 1137 1
15 LEDA 39024 LIN 12 13 46.107 +02 48 41.50           ~ 315 1
16 NGC 4355 Sy2 12 26 54.628 -00 52 39.51   14.21 13.37     ~ 425 2
17 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1827 3
18 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1311 2
19 2MASX J13150638-5509225 Sy2 13 15 06.383 -55 09 22.60   17.3       ~ 112 0
20 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4088 3
21 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2297 2
22 Mrk 273 Sy2 13 44 42.164 +55 53 13.53   15.68 14.91     ~ 840 3
23 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1040 2
24 2MASX J14373831-1500239 Sy1 14 37 38.317 -15 00 23.97   16.58 16.40     ~ 248 1
25 6dFGS gJ144059.0-370432 Sy2 14 40 59.0140344918 -37 04 31.937494895   17.72   16.48   ~ 95 0
26 2MASX J15265942+3558372 LIN 15 26 59.442 +35 58 37.01   15.61       ~ 248 1
27 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2741 4
28 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1515 2
29 6dFGS gJ172322.0-001701 LIN 17 23 21.943 -00 17 00.96   15.1       ~ 379 0
30 2MASX J19322229-0400010 EmG 19 32 22.2960198723 -04 00 01.793135107   18.85   17.04   ~ 90 0
31 LEDA 166649 G 19 56 35.79 +11 19 05.4           ~ 44 0
32 ESO 286-19 LIN 20 58 26.8182983654 -42 38 59.418569678   14.79 14.79 14.20   ~ 254 0
33 NAME South America H2G 22 51 49.307 -17 52 23.96   16.97       ~ 291 3
34 ESO 148-2 Sy2 23 15 46.772 -59 03 15.94   14.94 14.73 13.95   ~ 236 1
35 2MASX J23390127+3621087 SyG 23 39 01.274 +36 21 08.77   16.17       ~ 199 1

    Equat.    Gal    SGal    Ecl

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2021.04.19-15:36:32

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