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SDSS IV MaNGA - spatially resolved diagnostic diagrams: a proof that many galaxies are LIERs

Research output: Contribution to journalArticle

  • Francesco Belfiore
  • Roberto Maiolino
  • Professor Claudia Maraston
  • Eric Emsellem
  • Matthew A. Bershady
  • Karen L. Masters
  • Renbin Yan
  • Dmitry Bizyaev
  • Médéric Boquien
  • Joel R. Brownstein
  • Kevin Bundy
  • Niv Drory
  • Timothy M. Heckman
  • David R. Law
  • Alexandre Roman-Lopes
  • Kaike Pan
  • Letizia Stanghellini
  • Professor Daniel Thomas
  • Anne-Marie Weijmans
  • Kyle B. Westfall
We study the spatially resolved excitation properties of the ionised gas in a sample of 646 galaxies using integral field spectroscopy data from SDSS-IV MaNGA. Making use of Baldwin-Philips-Terlevich diagnostic diagrams we demonstrate the ubiquitous presence of extended (kpc scale) low ionisation emission-line regions (LIERs) in both star forming and quiescent galaxies. In star forming galaxies LIER emission can be associated with diffuse ionised gas, most evident as extra-planar emission in edge-on systems. In addition, we identify two main classes of galaxies displaying LIER emission: `central LIER' (cLIER) galaxies, where central LIER emission is spatially extended, but accompanied by star formation at larger galactocentric distances, and `extended LIER' (eLIER) galaxies, where LIER emission is extended throughout the whole galaxy. In eLIER and cLIER galaxies, LIER emission is associated with radially flat, low H$\alpha$ equivalent width of line emission ($
Original languageEnglish
Pages (from-to)3111-3134
Number of pages26
JournalMonthly Notices of the Royal Astronomical Society
Volume461
Issue number3
Early online date23 May 2016
DOIs
Publication statusPublished - 21 Sep 2016

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  • SDSS IV MaNGA - spatially resolved diagnostic diagrams

    Rights statement: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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