TY - JOUR
T1 - The WiggleZ Dark Energy Survey: High-resolution kinematics of luminous star-forming galaxies
AU - Wisnioski, Emily
AU - Glazebrook, Karl
AU - Blake, Chris
AU - Wyder, Ted
AU - Martin, Chris
AU - Poole, Gregory
AU - Sharp, Robert
AU - Couch, Warrick
AU - Kacprzak, Glenn
AU - Brough, Sarah
AU - Colless, Matthew
AU - Contreras, Carlos
AU - Croom, Scott
AU - Croton, Darren
AU - Davis, Tamara
AU - Drinkwater, Michael
AU - Forster, Karl
AU - Gilbank, David
AU - Gladders, Michael
AU - Jelliffe, Ben
AU - Jurek, Russell
AU - Li, I-hui
AU - Madore, Barry
AU - Pimbblet, Kevin
AU - Pracy, Michael
AU - Woods, David
AU - Yee, Howard
PY - 2011
Y1 - 2011
N2 - 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 [Oii] 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 1-2kpc size subcomponents of emission, or clumps , are detected within the HI? spatial emission which extends over 6-10kpc in four galaxies, resolved compact emission (r <3kpc) is detected in five galaxies and extended regions of HI? 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 (I? > 100kms-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.
AB - 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 [Oii] 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 1-2kpc size subcomponents of emission, or clumps , are detected within the HI? spatial emission which extends over 6-10kpc in four galaxies, resolved compact emission (r <3kpc) is detected in five galaxies and extended regions of HI? 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 (I? > 100kms-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.
UR - http://onlinelibrary.wiley.com.ezproxy.lib.monash.edu.au/doi/10.1111/j.1365-2966.2011.19429.x/abstract;jsessionid=49416A4185D6CC480887F78FE6CE9268.d04
UR - https://www.scopus.com/pages/publications/80255126293
U2 - 10.1111/j.1365-2966.2011.19429.x
DO - 10.1111/j.1365-2966.2011.19429.x
M3 - Article
SN - 0035-8711
VL - 417
SP - 2601
EP - 2623
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -