Galaxy-wide Shocks in Late-merger Stage Luminous Infrared Galaxies

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dc.contributor.authorRich, Jeff
dc.contributor.authorKewley, Lisa
dc.contributor.authorDopita, Michael
dc.date.accessioned2015-12-10T22:13:29Z
dc.date.issued2011
dc.date.updated2016-02-24T09:54:12Z
dc.description.abstractWe present an integral field spectroscopic study of two nearby luminous infrared galaxies (LIRGs), IC 1623 and NGC 3256, which exhibit evidence of widespread shock excitation induced by ongoing merger activity. We show the importance of carefully separating excitation due to shocks versus excitation by H II regions and the usefulness of integral field unit data in interpreting the complex processes in LIRGs. Our analysis focuses primarily on the emission line gas, which is extensive in both systems and is a result of the abundant ongoing star formation as well as widespread LINER-like excitation from shocks. We use emission line ratio maps, line kinematics, line-ratio diagnostics, and new models as methods for distinguishing and analyzing shocked gas in these systems. We discuss how our results inform the merger sequence associated with local U/LIRGs and the impact that widespread shock excitation has on the interpretation of emission line spectra and derived quantities of both local and high-redshift galaxies.
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/49775
dc.publisherIOP Publishing
dc.rightsAuthor/s retain copyrighten_AU
dc.sourceAstrophysical Journal, The
dc.subjectKeywords: galaxies: evolution; galaxies: individual (NGC 3256, IC 1623); galaxies: ISM; shock waves
dc.titleGalaxy-wide Shocks in Late-merger Stage Luminous Infrared Galaxies
dc.typeJournal article
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue2
local.bibliographicCitation.startpageA87
local.contributor.affiliationRich, Jeff, Institute for Astronomy
local.contributor.affiliationKewley, Lisa J, University of Hawaii
local.contributor.affiliationDopita, Michael, College of Physical and Mathematical Sciences, ANU
local.contributor.authoremailu7501303@anu.edu.au
local.contributor.authoruidDopita, Michael, u7501303
local.description.notesImported from ARIES
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
local.identifier.ariespublicationu3356449xPUB192
local.identifier.ariespublicationu4630950xPUB69
local.identifier.citationvolume734
local.identifier.doi10.1088/0004-637X/734/2/87
local.identifier.scopusID2-s2.0-79958272718
local.identifier.thomsonID000291386500015
local.identifier.uidSubmittedByu3356449
local.type.statusPublished Version

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