2014A&A...566A..49P


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST19:26:29

2014A&A...566A..49P - Astronomy and Astrophysics, volume 566A, 49-49 (2014/6-1)

Warm molecular gas temperature distribution in six local infrared bright Seyfert galaxies.

PEREIRA-SANTAELLA M., SPINOGLIO L., VAN DER WERF P.P. and PIQUERAS LOPEZ J.

Abstract (from CDS):

We simultaneously analyze the spectral line energy distributions (SLEDs) of CO and H2 of six local luminous infrared (IR) Seyfert galaxies. For the CO SLEDs, we used new Herschel/SPIRE FTS data (from J=4-3 to J=13-12) and ground-based observations for the lower-J CO transitions. The H2 SLEDs were constructed using archival mid-IR Spitzer/IRS and near-IR VLT/SINFONI data for the rotational and ro-vibrational H2 transitions, respectively. In total, the SLEDs contain 26 transitions with upper level energies between 5 and 15000K. A single, constant density, model (nH2∼104.5–6cm–3) with a broken power-law temperature distribution reproduces well both the CO and H2 SLEDs. The power-law indices are β1∼1-3 for warm molecular gas (20K<T<100K) and β2∼4-5 for hot molecular gas (T>100K). We show that the steeper temperature distribution (higher β) for hot molecular gas can be explained by shocks and photodissociation region (PDR) models; however, the exact β values are not reproduced by PDR or shock models alone and a combination of both is needed. We find that the three major mergers among our targets have shallower temperature distributions for warm molecular gas than the other three spiral galaxies. This can be explained by a higher relative contribution of shock excitation, with respect to PDR excitation, for the warm molecular gas in these mergers. For only one of the mergers, IRASF 05189-2524, the shallower H2 temperature distribution differs from that of the spiral galaxies. The presence of a bright active galactic nucleus in this source might explain the warmer molecular gas observed.

Abstract Copyright:

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

Simbad objects: 9

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Number of rows : 9

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 34 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 307 0
2 HD 955 * 00 13 55.6007172748 -17 32 43.332248066 6.52 7.203 7.361     B3/5V 45 0
3 2MASX J05210136-2521450 Sy2 05 21 01.3987198411 -25 21 45.269338983   15.47 14.75     ~ 427 0
4 HD 48574 * 06 43 14.3488108375 -21 51 44.571217729   7.11 7.25     B5V 11 0
5 UGC 5101 Sy1 09 35 51.694 +61 21 10.52   15.20 15.50     ~ 503 4
6 HD 92552 * 10 39 55.8553455238 -56 16 40.210973829   7.94 8.00     B3/5V 16 0
7 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 425 1
8 NGC 7130 AGN 21 48 19.490 -34 57 04.73   12.86 13.87 11.57   ~ 382 0
9 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1888 3

    Equat.    Gal    SGal    Ecl

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2020.07.11-19:26:29

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