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MUSE-INGS on AM1354-250: COLLISIONS, SHOCKS, and RINGS

Conn, Blair; Fogarty, Lisa M R; Smith, Rory; Candlish, Graeme N.

Description

We present Multi Unit Spectroscopic Explorer observations of AM1354-250, confirming its status as a collisional ring galaxy that has recently undergone an interaction, creating its distinctive shape. We analyze the stellar and gaseous emission throughout the galaxy finding direct evidence that the gaseous ring is expanding with a velocity of ∼70 km s-1 and that star formation is occurring primarily in H ii regions associated with the ring. This star formation activity is likely triggered by...[Show more]

dc.contributor.authorConn, Blair
dc.contributor.authorFogarty, Lisa M R
dc.contributor.authorSmith, Rory
dc.contributor.authorCandlish, Graeme N.
dc.date.accessioned2018-11-29T22:52:26Z
dc.date.available2018-11-29T22:52:26Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/152173
dc.description.abstractWe present Multi Unit Spectroscopic Explorer observations of AM1354-250, confirming its status as a collisional ring galaxy that has recently undergone an interaction, creating its distinctive shape. We analyze the stellar and gaseous emission throughout the galaxy finding direct evidence that the gaseous ring is expanding with a velocity of ∼70 km s-1 and that star formation is occurring primarily in H ii regions associated with the ring. This star formation activity is likely triggered by this interaction. We find evidence for several excitation mechanisms in the gas, including emission consistent with shocked gas in the expanding ring and a region of LINER-like emission in the central core of the galaxy. Evidence of kinematic disturbance in both the stars and gas, possibly also triggered by the interaction, can be seen in all of the velocity maps. The ring galaxy retains a weak spiral structure, strongly suggesting the progenitor galaxy was a massive spiral prior to the collision with its companion an estimated 140 12 Myr ago
dc.format.mimetypeapplication/pdf
dc.publisherIOP Publishing
dc.sourceThe Astrophysical Journal
dc.titleMUSE-INGS on AM1354-250: COLLISIONS, SHOCKS, and RINGS
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume819
dc.date.issued2016
local.identifier.absfor020104 - Galactic Astronomy
local.identifier.ariespublicationa383154xPUB8426
local.type.statusPublished Version
local.contributor.affiliationConn, Blair, College of Science, ANU
local.contributor.affiliationFogarty, Lisa M R, University of Sydney
local.contributor.affiliationSmith, Rory, Graduate School of Earth System Sciences-Astronomy-Atmospheric Sciences, Yonsei University
local.contributor.affiliationCandlish, Graeme N., Departamento de Astronomía, Universidad de Concepción
local.bibliographicCitation.issue2
local.identifier.doi10.3847/0004-637X/819/2/165
dc.date.updated2018-11-29T07:46:02Z
local.identifier.scopusID2-s2.0-84960895109
local.identifier.thomsonID000372305700077
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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