The WiggleZ Dark Energy Survey: High-resolution kinematics of luminous star-forming galaxies

Wisnioski, Emily, Glazebrook, Karl, Blake, Chris, Wyder, Ted, Martin, Chris, Poole, Gregory B., Sharp, Rob, Couch, Warrick, Kacprzak, Glenn G., Brough, Sarah, Colless, Matthew, Contreras, Carlos, Croom, Scott, Croton, Darren, Davis, Tamara, Drinkwater, Michael J., Forster, Karl, Gilbank, David G., Gladders, Michael, Jelliffe, Ben, Jurek, Russell J., Li, I-hui, Madore, Barry, Pimbblet, Kevin, Pracy, Michael, Woods, David and Yee, H. K. C. (2011) The WiggleZ Dark Energy Survey: High-resolution kinematics of luminous star-forming galaxies. Monthly Notices of the Royal Astronomical Society, 417 4: 2601-2623. doi:10.1111/j.1365-2966.2011.19429.x

Author Wisnioski, Emily
Glazebrook, Karl
Blake, Chris
Wyder, Ted
Martin, Chris
Poole, Gregory B.
Sharp, Rob
Couch, Warrick
Kacprzak, Glenn G.
Brough, Sarah
Colless, Matthew
Contreras, Carlos
Croom, Scott
Croton, Darren
Davis, Tamara
Drinkwater, Michael J.
Forster, Karl
Gilbank, David G.
Gladders, Michael
Jelliffe, Ben
Jurek, Russell J.
Li, I-hui
Madore, Barry
Pimbblet, Kevin
Pracy, Michael
Woods, David
Yee, H. K. C.
Title The WiggleZ Dark Energy Survey: High-resolution kinematics of luminous star-forming galaxies
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
Publication date 2011-11
Sub-type Article (original research)
DOI 10.1111/j.1365-2966.2011.19429.x
Open Access Status DOI
Volume 417
Issue 4
Start page 2601
End page 2623
Total pages 23
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2012
Language eng
Abstract We report evidence of ordered orbital motion in luminous star-forming galaxies at z ∼ 1.3.We present integral field spectroscopy (IFS) observations, performed with the OH Suppressing InfraRed Imaging Spectrograph (OSIRIS) system, assisted by laser guide star adaptive optics on the Keck telescope, of 13 star-forming galaxies selected from the WiggleZ Dark Energy Survey. Selected via ultraviolet and [O II] emission, the large volume of the WiggleZ survey allows the selection of sources which have comparable intrinsic luminosity and stellar mass to IFS samples at z > 2. Multiple 1–2 kpc size subcomponents of emission, or ‘clumps’, are detected within the Hα spatial emission which extends over 6–10 kpc in four galaxies, resolved compact emission (r < 3 kpc) is detected in five galaxies and extended regions of Hα emission are observed in the remaining four galaxies. We discuss these data in the context of different snapshots in a merger sequence and/or the evolutionary stages of coalescence of star-forming regions in an unstable disc.We find evidence of ordered orbital motion in galaxies as expected from disc models and the highest values of velocity dispersion (σ > 100 km s−1) in the most compact sources. This unique data set reveals that the most luminous star-forming galaxies at z > 1 are gaseous unstable discs indicating that a different mode of star formation could be feeding gas to galaxies at z > 1, and lending support to theories of cold dense gas flows from the intergalactic medium.
Keyword Galaxies: evolution
Galaxies: formation
Galaxies: high-redshift
Galaxies: kinematics and dynamics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Accepted 2011 July 11. Received 2011 July 11; in original form 2011 April 30

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2012 Collection
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