The SAMI Galaxy Survey: disc-halo interactions in radio-selected star-forming galaxies

S. K. Leslie*, J. J. Bryant, I. -T. Ho, E. M. Sadler, A. M. Medling, B. Groves, L. J. Kewley, J. Bland-Hawthorn, S. M. Croom, O. I. Wong, S. Brough, E. Tescari, S. M. Sweet, R. Sharp, A. W. Green, A. R. Lopez-Sanchez, J. T. Allen, Lisa M. R. Fogarty, M. Goodwin, J. S. LawrenceIraklis S. Konstantopoulos, M. S. Owers, S. N. Richards

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In this paper, we compare the radio emission at 1.4 GHz with optical outflowsignatures of edgeon galaxies. We report observations of six edge-on star-forming galaxies in the Sydney-AAO Multiobject Integral-field spectrograph Galaxy Survey with 1.4 GHz luminosities > 1 x 1021 WHz-1. Extended minor axis optical emission is detected with enhanced [N II]/H α line ratios and velocity dispersions consistent with galactic winds in three of six galaxies. These galaxies may host outflows driven by a combination of thermal and cosmic ray processes. We find that galaxies with the strongest wind signatures have extended radio morphologies. Our results form a baseline for understanding the driving mechanisms of galactic winds.

Original languageEnglish
Pages (from-to)2438-2452
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Volume471
Issue number2
DOIs
Publication statusPublished - Oct 2017

Keywords

  • cosmic rays
  • galaxies: evolution
  • galaxies: haloes
  • galaxies: ISM
  • galaxies: jets
  • galaxies: kinematics and dynamics

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