H i galaxies with little star formation: An abundance of LIERs

Vaishali Parkash, Michael J.I. Brown, T. H. Jarrett, A. Fraser-Mckelvie, M. E. Cluver

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2 Citations (Scopus)

Abstract

We present a sample of 91 H I galaxies with little or no star formation, and discuss the analysis of the integral field unit (IFU) spectra of 28 of these galaxies. We identified H I galaxies from the H I Parkes All-Sky Survey Catalog (HICAT) with Wide-field Infrared Survey Explorer (WISE) colours consistent with low specific star formation (<10 -10.4 yr -1 ), and obtained optical IFU spectra with the Wide-Field Spectrograph (WiFeS). Visual inspection of the PanSTARRS, Dark Energy Survey, and Carnegie-Irvine imaging of 62 galaxies reveals that at least 32 galaxies in the sample have low levels of star formation, primarily in arms/rings. New IFU spectra of 28 of these galaxies reveals 3 galaxies with central star formation, 1 galaxy with low-ionization nuclear emission-line regions (LINERs), 20 with extended low-ionization emission-line regions (LIERs), and 4 with high excitation Seyfert (Sy) emission. From the spectroscopic analysis of H I selected galaxies with little star formation, we conclude that 75 per cent of this population are LINERs/LIERs.

Original languageEnglish
Pages (from-to)3169-3184
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Volume485
Issue number3
DOIs
Publication statusPublished - 28 Feb 2019

Keywords

  • Galaxies: active
  • Galaxies: evolution
  • Galaxies: ISM
  • Galaxies: star formation

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