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Galaxy And Mass Assembly (GAMA): bivariate functions of H  star-forming galaxies

Gunawardhana, M. L. P; Hopkins, A. M; Taylor, E. N; Bland-Hawthorn, J; Norberg, P; Baldry, Ivan; Loveday, J; Owers, M. S; Wilkins, S. M; Colless, Matthew; Brown, M. J. I; Driver, S. P; Alpaslan, M; Brough, S.; Cluver, M.; Croom, S.; Kelvin, L.; López-Sánchez, M. A.; Liske, J.; Lopez-Sanchez, A. R.; Robotham, A. S. G.

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We present bivariate luminosity and stellar mass functions of Hα star-forming galaxies drawn from the Galaxy And Mass Assembly (GAMA) survey. While optically deep spectroscopic observations of GAMA over a wide sky area enable the detection of a large number of 0.001 < SFRHα (M⊙ yr¯¹) < 100 galaxies, the requirement for an Hα detection in targets selected from an r-band magnitude-limited survey leads to an incompleteness due to missing optically faint star-forming galaxies. Using z < 0.1...[Show more]

dc.contributor.authorGunawardhana, M. L. P
dc.contributor.authorHopkins, A. M
dc.contributor.authorTaylor, E. N
dc.contributor.authorBland-Hawthorn, J
dc.contributor.authorNorberg, P
dc.contributor.authorBaldry, Ivan
dc.contributor.authorLoveday, J
dc.contributor.authorOwers, M. S
dc.contributor.authorWilkins, S. M
dc.contributor.authorColless, Matthew
dc.contributor.authorBrown, M. J. I
dc.contributor.authorDriver, S. P
dc.contributor.authorAlpaslan, M
dc.contributor.authorBrough, S.
dc.contributor.authorCluver, M.
dc.contributor.authorCroom, S.
dc.contributor.authorKelvin, L.
dc.contributor.authorLópez-Sánchez, M. A.
dc.contributor.authorLiske, J.
dc.contributor.authorLopez-Sanchez, A. R.
dc.contributor.authorRobotham, A. S. G.
dc.date.accessioned2015-04-10T05:31:56Z
dc.date.available2015-04-10T05:31:56Z
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/13218
dc.description.abstractWe present bivariate luminosity and stellar mass functions of Hα star-forming galaxies drawn from the Galaxy And Mass Assembly (GAMA) survey. While optically deep spectroscopic observations of GAMA over a wide sky area enable the detection of a large number of 0.001 < SFRHα (M⊙ yr¯¹) < 100 galaxies, the requirement for an Hα detection in targets selected from an r-band magnitude-limited survey leads to an incompleteness due to missing optically faint star-forming galaxies. Using z < 0.1 bivariate distributions as a reference we model the higher-z distributions, thereby approximating a correction for the missing optically faint star-forming galaxies to the local star formation rate (SFR) and M densities. Furthermore, we obtain the r-band luminosity functions (LFs) and stellar mass functions of Hα star-forming galaxies from the bivariate LFs. As our sample is selected on the basis of detected Hα emission, a direct tracer of ongoing star formation, this sample represents a true star-forming galaxy sample, and is drawn from both photometrically classified blue and red subpopulations, though mostly from the blue population. On average 20–30 per cent of red galaxies at all stellar masses are star forming, implying that these galaxies may be dusty star-forming systems.
dc.description.sponsorshipMLPG acknowledges support provided through the Australian Postgraduate Award and Australian Astronomical Observatory PhD scholarship. MLPG and PN acknowledge support from a European Research Council Starting Grant (DEGAS-259586).
dc.publisherOxford University Press
dc.rightshttp://www.sherpa.ac.uk/romeo/issn/0035-8711/..."Publisher's version/PDF may be used. Author's Post-print and Publisher's version/PDF on Institutional repositories or Central repositories, Set phrase to accompany archived copy (see policy)" from SHERPA/RoMEO site (as at 10/04/15) This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.titleGalaxy And Mass Assembly (GAMA): bivariate functions of H  star-forming galaxies
dc.typeJournal article
local.identifier.citationvolume447
dcterms.dateAccepted2014-10-10
dc.date.issued2015
local.identifier.absfor020100 - ASTRONOMICAL AND SPACE SCIENCES
local.identifier.ariespublicationa383154xPUB1043
local.publisher.urlhttp://www.oxfordjournals.org/en/
local.type.statusPublished Version
local.contributor.affiliationColless, M., Research School of Astronomy and Astrophysics, The Australian National University
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage875
local.bibliographicCitation.lastpage901
local.identifier.doi10.1093/mnras/stu2232
dc.date.updated2015-12-10T09:52:43Z
local.identifier.scopusID2-s2.0-84922439166
CollectionsANU Research Publications

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