2014ApJ...787...48X


Query : 2014ApJ...787...48X

2014ApJ...787...48X - Astrophys. J., 787, 48 (2014/May-3)

ALMA observations of warm molecular gas and cold dust in NGC 34.

XU C.K., CAO C., LU N., GAO Y., VAN DER WERF P., EVANS A.S., MAZZARELLA J.M., CHU J., HAAN S., DIAZ-SANTOS T., MEIJERINK R., ZHAO Y.-H., APPLETON P., ARMUS L., CHARMANDARIS V., LORD S., MURPHY E.J., SANDERS D.B., SCHULZ B. and STIERWALT S.

Abstract (from CDS):

We present Atacama Large Millimeter Array (ALMA) Cycle-0 observations of the CO (6-5) line emission (rest-frame frequency = 691.473 GHz) and of the 435 µm dust continuum emission in the nuclear region of NGC 34, a local luminous infrared galaxy at a distance of 84 Mpc (1'' = 407 pc) which contains a Seyfert 2 active galactic nucleus (AGN) and a nuclear starburst. The CO emission is well resolved by the ALMA beam (0.''26x0.''23), with an integrated flux of fCO(6–5)= 1004 (± 151) Jy km/s. Both the morphology and kinematics of the CO (6-5) emission are rather regular, consistent with a compact rotating disk with a size of 200 pc. A significant emission feature is detected on the redshifted wing of the line profile at the frequency of the H13CN (8-7) line, with an integrated flux of 17.7±2.1(random)±2.7(systematic) Jy km/s. However, it cannot be ruled out that the feature is due to an outflow of warm dense gas with a mean velocity of 400 km/s. The continuum is resolved into an elongated configuration, and the observed flux corresponds to a dust mass of Mdust= 106.97±0.13 M. An unresolved central core (radius ≃ 50 pc) contributes 28% of the continuum flux and 19% of the CO (6-5) flux, consistent with insignificant contributions of the AGN to both emissions. Both the CO (6-5) and continuum spatial distributions suggest a very high gas column density ( ≳ 104 M/pc2) in the nuclear region at radius ≲ 100 pc.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: general - galaxies: interactions - galaxies: starburst - galaxies: Seyfert - submillimeter: galaxies

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 34 Sy2 00 11 06.612 -12 06 28.33   14.14 13.52     ~ 347 0
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3303 2
3 IC 1623 IG 01 07 47.2 -17 30 25   15       ~ 307 2
4 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1505 1
5 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5815 6
6 NGC 4355 Sy2 12 26 54.6206739120 -00 52 39.421212996   14.21 13.37     ~ 485 2
7 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2952 4
8 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14216 0
9 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2827 2
10 QSO B2345-167 QSO 23 48 02.60851466 -16 31 12.0222546   18.00 18.41 16.86   ~ 403 1

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