학술논문

H i galaxies with little star formation: an abundance of LIERs.
Document Type
Article
Source
Monthly Notices of the Royal Astronomical Society. May2019, Vol. 485 Issue 3, p3169-3184. 16p.
Subject
*SEYFERT galaxies
*STAR formation
*GALAXIES
*DARK energy
*GALAXY spectra
*INSPECTION & review
Language
ISSN
0035-8711
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. [ABSTRACT FROM AUTHOR]