2016A&A...587A..15L


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET09:43:51

2016A&A...587A..15L - Astronomy and Astrophysics, volume 587A, 15-15 (2016/3-1)

Evidence for a chemically differentiated outflow in Mrk 231.

LINDBERG J.E., AALTO S., MULLER S., MARTI-VIDAL I., FALSTAD N., COSTAGLIOLA F., HENKEL C., VAN DER WERF P., GARCIA-BURILLO S. and GONZALEZ-ALFONSO E.

Abstract (from CDS):

Our goal is to study the chemical composition of the outflows of active galactic nuclei and starburst galaxies. We obtained high-resolution interferometric observations of HCN and HCO+ J=1->0 and J=2->1 of the ultra-luminous infrared galaxy Mrk 231 with the IRAM Plateau de Bure Interferometer. We also use previously published observations of HCN and HCO+ J=1->0 and J=3->2, and HNC J=1->0 in the same source. In the line wings of the HCN, HCO+, and HNC emission, we find that these three molecular species exhibit features at distinct velocities which differ between the species. The features are not consistent with emission lines of other molecular species. Through radiative transfer modelling of the HCN and HCO+ outflow emission we find an average abundance ratio X(HCN)/X(HCO+)> 1000. Assuming a clumpy outflow, modelling of the HCN and HCO+ emission produces strongly inconsistent outflow masses. Both the anti-correlated outflow features of HCN and HCO+ and the different outflow masses calculated from the radiative transfer models of the HCN and HCO+ emission suggest that the outflow is chemically differentiated. The separation between HCN and HCO+ could be an indicator of shock fronts present in the outflow, since the HCN/HCO+ ratio is expected to be elevated in shocked regions. Our result shows that studies of the chemistry in large-scale galactic outflows can be used to better understand the physical properties of these outflows and their effects on the interstellar medium in the galaxy.

Abstract Copyright:

Journal keyword(s): galaxies: individual: Mrk 231 - galaxies: active - galaxies: evolution - quasars: general - ISM: jets and outflows - ISM: molecules

Simbad objects: 9

goto Full paper

goto View the reference in ADS

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 - 2021
#notes
1 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4176 2
2 NAME IRAS F08572+3915 NW LIN 09 00 25.364 +39 03 54.23     16.66     ~ 370 1
3 IC 694 G 11 28 27.312 +58 34 42.29   18.2       ~ 240 2
4 LB 2136 QSO 11 53 24.46663282 +49 31 08.8301947   17.94 17.66     ~ 434 1
5 NGC 4355 Sy2 12 26 54.628 -00 52 39.51   14.21 13.37     ~ 418 2
6 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1815 3
7 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1300 2
8 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3888 4
9 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 720 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2016A&A...587A..15L and select 'bookmark this link' or equivalent in the popup menu


2021.03.01-09:43:51

© Université de Strasbourg/CNRS

    • Contact