2018A&A...617A..20A


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST22:41:29

2018A&A...617A..20A - Astronomy and Astrophysics, volume 617A, 20-20 (2018/9-1)

Molecular gas in the northern nucleus of Mrk 273: Physical and chemical properties of the disc and its outflow.

ALADRO R., KONIG S., AALTO S., GONZALEZ-ALFONSO E., FALSTAD N., MARTIN S., MULLER S., GARCIA-BURILLO S., HENKEL C., VAN DER WERF P., MILLS E., FISCHER J., COSTAGLIOLA F. and KRIPS M.

Abstract (from CDS):

Aiming to characterise the properties of the molecular gas in the ultra-luminous infrared galaxy Mrk 273 and its outflow, we used the NOEMA interferometer to image the dense-gas molecular tracers HCN, HCO+, HNC, HOC+ and HC3N at ∼86GHz and ∼256GHz with angular resolutions of 4.9"x4.5" (∼3.7x3.4kpc) and 0.61"x0.55" (∼460x420pc). We also modelled the flux of several H2O lines observed with Herschel using a radiative transfer code that includes excitation by collisions and far-infrared photons. The disc of the Mrk 273 north nucleus has two components with decoupled kinematics. The gas in the outer parts (R∼1.5kpc) rotates with a south-east to north-west direction, while in the inner disc (R∼300pc) follows a north-east to south-west rotation. The central 300pc, which hosts a compact starburst region, is filled with dense and warm gas, and contains a dynamical mass of (4-5)x109M, a luminosity of L'HCN=(3-4)x108K.(km/s).pc2, and a dust temperature of 55K. At the very centre, a compact core with R∼50pc has a luminosity of LIR=4x1011L (30% of the total infrared luminosity), and a dust temperature of 95K. The core is expanding at low velocities ∼50-100km/s, probably affected by the outflowing gas. We detect the blue-shifted component of the outflow, while the red-shifted counterpart remains undetected in our data. Its cold and dense phase reaches fast velocities up to ∼1000km/s, while the warm outflowing gas has more moderate maximum velocities of ∼600km/s. The outflow is compact, being detected as far as 460pc from the centre in the northern direction, and has a mass of dense gas ≥8x108M. The difference between the position angles of the inner disc (∼70°) and the outflow (∼10°) indicates that the outflow is likely powered by the AGN, and not by the starburst. Regarding the chemistry in Mrk 273, we measure an extremely low HCO+/HOC+ ratio of 10±5 in the inner disc of Mrk 273.

Abstract Copyright: © ESO 2018

Journal keyword(s): galaxies: individual: Mrk 273 - galaxies: nuclei - ISM: molecules - line: profiles - astrochemistry - galaxies: kinematics and dynamics

Simbad objects: 10

goto Full paper

goto View the reference in ADS

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 - 2020
#notes
1 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1172 3
2 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3544 3
3 NGC 4355 Sy2 12 26 54.628 -00 52 39.51   14.21 13.37     ~ 404 2
4 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1777 3
5 IC 860 LIN 13 15 03.51 +24 37 07.8   14.8       ~ 178 0
6 Mrk 273 Sy2 13 44 42.070 +55 53 13.17   15.68 14.91     ~ 823 3
7 6C 141804+543700 BLL 14 19 46.5976435439 +54 23 14.787308481   16.17 15.65 14.16   ~ 537 1
8 Z 49-57 GiC 15 13 13.1 +07 13 32   15.5       ~ 207 1
9 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2679 4
10 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 707 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018A&A...617A..20A and select 'bookmark this link' or equivalent in the popup menu


2020.07.03-22:41:29

© Université de Strasbourg/CNRS

    • Contact