2012A&A...537A..44A


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.20CEST03:57:13

2012A&A...537A..44A - Astronomy and Astrophysics, volume 537A, 44-44 (2012/1-1)

Detection of HCN, HCO+, and HNC in the Mrk 231 molecular outflow. Dense molecular gas in the AGN wind.

AALTO S., GARCIA-BURILLO S., MULLER S., WINTERS J.M., VAN DER WERF P., HENKEL C., COSTAGLIOLA F. and NERI R.

Abstract (from CDS):

Our goal is to study gas properties in large-scale molecular outflows and winds from active galactic nuclei (AGNs) and starburst galaxies. We obtained high-resolution (1.55"x1.28") observations of HCN, HCO+, HNC 1-0 and HC3N 10-9 of the ultraluminous galaxy (ULIRG) Mrk 231 with the IRAM Plateau de Bure Interferometer. We detect luminous emission from HCN, HCO+ and HNC 1-0 in the QSO ULIRG Mrk 231. All three lines show broad line wings - which are particularly prominent for HCN. Velocities are found to be similar (≃±750km/s) to those found for CO 1-0. This is the first time bright HCN, HCO+ and HNC emission has been detected in a large-scale galactic outflow. We find that both the blue- and red-shifted line wings are spatially extended by at least 0.75" (>700pc) in a north-south direction. The line wings are brighter (relative to the line center intensity) in HCN than in CO 1-0 and line ratios suggest that the molecular outflow consists of dense (n>104cm–3) and clumpy gas with a high HCN abundance X(HCN)>10–8. These properties are consistent with the molecular gas being compressed and fragmented by shocks in the outflow. Alternatively, HCN is instead pumped by mid-IR continuum, but we propose that this effect is not strong for the spatially extended outflowing gas. In addition, we find that the rotation of the main disk, in east-west direction, is also evident in the HCN, HCO+ and HNC line emission. An unexpectedly bright HC3N 10-9 line is detected inside the central 400pc of Mrk 231. This HC3N emission may emerge from a shielded, dust-enshrouded region within the inner 40-50 pc where the gas is heated to high temperatures (200-300K) by the AGN.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: individual: Mrk 231 - galaxies: active - quasars: general - radio lines: ISM - ISM: molecules

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 - 2019
#notes
1 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 3983 2
2 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5213 6
3 NGC 4355 Sy2 12 26 54.628 -00 52 39.51   14.21 13.37     ~ 385 2
4 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5242 1
5 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1736 3
6 6C 125719+515648 QSO 12 59 31.17401831 +51 40 56.2607603           ~ 22 1
7 6C 130047+580454 QSO 13 02 52.46527568 +57 48 37.6093180   20.47 19.76 20.63   ~ 69 1
8 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2620 4
9 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 306 4

    Equat.    Gal    SGal    Ecl

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2019.10.20-03:57:13

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