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The slope of the baryonic tully-fisher relation

Gurovich, Sebastian; Freeman, Kenneth; Jerjen, Helmut; Staveley-Smith, Lister; Puerari, I

Description

We present the results of a baryonic Tully-Fisher relation (BTFR) study for a local sample of relatively isolated disk galaxies. We derive a BTFR with a slope near 3 measured over about 4 dex in baryon mass for our combined HI and bright spiral disk samples. This BTFR is significantly flatter and has less scatter than the TFR (stellar mass only) with its slope near 4 reported for other samples and studies. A BTFR slope near 3 is in better agreement with the expected slope from simple ACDM...[Show more]

dc.contributor.authorGurovich, Sebastian
dc.contributor.authorFreeman, Kenneth
dc.contributor.authorJerjen, Helmut
dc.contributor.authorStaveley-Smith, Lister
dc.contributor.authorPuerari, I
dc.date.accessioned2015-12-10T23:16:09Z
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/64938
dc.description.abstractWe present the results of a baryonic Tully-Fisher relation (BTFR) study for a local sample of relatively isolated disk galaxies. We derive a BTFR with a slope near 3 measured over about 4 dex in baryon mass for our combined HI and bright spiral disk samples. This BTFR is significantly flatter and has less scatter than the TFR (stellar mass only) with its slope near 4 reported for other samples and studies. A BTFR slope near 3 is in better agreement with the expected slope from simple ACDM cosmological simulations that include both stellar and gas baryons. The scatter in the TFR/BTFR appears to depend on W20: galaxies that rotate slower have more scatter. The atomic gas-to-stars ratio shows a break near W20 = 250 km s-1 probably associated with a change in star formation efficiency. In contrast, the absence of such a break in the BTFR suggests that this relation was probably set at the main epoch of baryon dissipation rather than as a product of later galactic evolution.
dc.publisherUniversity of Chicago Press
dc.sourceAstronomical Journal
dc.subjectKeywords: Cosmology; Dark matter; Evolution; Formation; Galaxies; Observations
dc.titleThe slope of the baryonic tully-fisher relation
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume140
dc.date.issued2010
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.ariespublicationf2965xPUB1025
local.type.statusPublished Version
local.contributor.affiliationGurovich, Sebastian, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFreeman, Kenneth, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationJerjen, Helmut, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationStaveley-Smith, Lister, University of Western Australia
local.contributor.affiliationPuerari, I, Instituto Nacional de Astrofisica
local.description.embargo2037-12-31
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage663
local.bibliographicCitation.lastpage676
local.identifier.doi10.1088/0004-6256/140/3/663
dc.date.updated2016-02-24T08:08:14Z
local.identifier.scopusID2-s2.0-77957339964
local.identifier.thomsonID000280882300001
CollectionsANU Research Publications

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