Query : 2019A&A...623A.171P

2019A&A...623A.171P - Astronomy and Astrophysics, volume 623A, 171-171 (2019/3-1)

Multi-phase outflows in Mkn 848 observed with SDSS-MaNGA integral field spectroscopy.


Abstract (from CDS):

Aims. The characterisation of galaxy-scale outflows in terms of their multi-phase and multi-scale nature, amount, and effects of flowing material is crucial to place constraints on models of galaxy formation and evolution. This study can proceed only with the detailed investigation of individual targets.
Methods. We present a spatially resolved spectroscopic optical data analysis of Mkn 848, a complex system consisting of two merging galaxies at z∼0.04 that are separated by a projected distance of 7.5kpc. Motivated by the presence of a multi-phase outflow in the north-west system revealed by the SDSS integrated spectrum, we analysed the publicly available MaNGA data, which cover almost the entire merging system, to study the kinematic and physical properties of cool and warm gas in detail.
Results. Galaxy-wide outflowing gas in multiple phases is revealed for the first time in the two merging galaxies. We also detect spatially resolved resonant Na ID emission associated with the outflows. The derived outflow energetics (mass rate, and kinetic and momentum power) may be consistent with a scenario in which both winds are accelerated by stellar processes and AGN activity, although we favour an AGN origin given the high outflow velocities and the ionisation conditions observed in the outflow regions. Further deeper multi-wavelength observations are required, however, to better constrain the nature of these multi-phase outflows. Outflow energetics in the North-West system are strongly different between the ionised and atomic gas components, the latter of which is associated with mass outflow rate and kinetic and momentum powers that are one or two dex higher; those associated with the south-east galaxy are instead similar.
Conclusions. Strong kiloparsec-scale outflows are revealed in an ongoing merger system, suggesting that feedback can potentially impact the host galaxy even in the early merger phases. The characterisation of the neutral and ionised gas phases has proved to be crucial for a comprehensive study of the outflow phenomena.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: active - ISM: jets and outflows - galaxies: individual: Mkn 848

VizieR on-line data: <Available at CDS (J/A+A/623/A171): list.dat fits/*>

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11135 1
2 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 721 3
3 LEDA 17155 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 497 0
4 LEDA 89500 Sy2 06 21 01.188 -63 17 23.81   16.70   15.27   ~ 68 1
5 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1986 3
6 Mrk 273 Sy2 13 44 42.1781 +55 53 12.819   15.68 14.91     ~ 911 3
7 Z 221-50 SyG 15 18 06.1187 +42 44 45.086   15.0 15     ~ 219 1

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