2000A&AS..141..193C


Query : 2000A&AS..141..193C

2000A&AS..141..193C - Astron. Astrophys., Suppl. Ser., 141, 193-209 (2000/January-2)

Dense molecular gas in Seyfert galaxies.

CURRAN S.J., AALTO S. and BOOTH R.S.

Abstract (from CDS):

We have used the 20 m Onsala and 15 m SEST telescopes to observe the CO J=1->0 (simultaneously with CO J=2->1 at SEST) and HCN J=1->0 (simultaneously with CS J=3->2 at SEST) transitions in 20 Seyfert galaxies. The sample consists of the 18 galaxies detected in CO J=1->0 by Heckman et al. (1989ApJ...342..735H) plus 2 which were not detected in their survey. We have successfully detected all of the galaxies in the CO transition and 13 in HCN of which NGCs 1667, 2273, 5033, 5135, 6814 and Mrk 273 are new detections. For the galaxies in which the beam-width exceeds ≃10 kpc we find that (LHCN)/(LCO)≃1/6, i.e. a global ratio similar to that of ultra-luminous infrared galaxies and over 10 times the ratio for normal spiral galaxies. This implies that (LFIR)/(LCO) (LFIR∼1011L Seyferts)≃10(LFIR)/(LCO) (normal spirals) and we believe that the far infrared fluxes in our sample arise from star-burst activity, although we cannot rule out the possibility of a contribution from active galactic nuclei.

Abstract Copyright:

Journal keyword(s): galaxies: Seyfert - galaxies: abundances - galaxies: ISM

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 34 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 332 0
2 NGC 931 Sy1 02 28 14.4689104272 +31 18 41.469363324   15.71 14.74     ~ 375 0
3 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4332 2
4 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1641 2
5 NGC 1667 Sy2 04 48 37.1804579280 -06 19 11.824427712   13.66 12.86 11.72   ~ 349 1
6 UGC 3374 Sy1 05 54 53.6080860768 +46 26 21.624853488   15.37 14.62     ~ 491 2
7 NGC 2273 Sy2 06 50 08.6691789600 +60 50 44.864645136   14.50 13.54     ~ 495 3
8 Mrk 10 Sy1 07 47 29.0792948928 +60 56 00.658649544   15.18 14.71     ~ 226 0
9 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2229 3
10 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1014 0
11 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1898 3
12 NGC 5033 Sy1 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 829 3
13 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 455 1
14 Mrk 273 Sy2 13 44 42.1883001096 +55 53 13.596220932   15.68 14.91     ~ 864 3
15 NGC 5347 Sy2 13 53 17.7984934128 +33 29 27.011618196   13.46 12.70     ~ 337 1
16 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2536 0
17 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2827 4
18 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 763 0
19 NGC 7130 AGN 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 417 0
20 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15   ~ 496 1
21 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1994 3

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2022.06.25-10:17:44

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