The WiggleZ dark energy survey: Final data release and the metallicity of UV-luminous galaxies

Drinkwater, Michael J., Byrne, Zachary J., Blake, Chris, Glazebrook, Karl, Brough, Sarah, Colless, Matthew, Couch, Warrick, Croton, Darren J., Croom, Scott M., Davis, Tamara M., Forster, Karl, Gilbank, David, Hinton, Samuel R., Jelliffe, Ben, Jurek, Russell J., Li, I.-Hui, Christopher Martin, D., Pimbblet, Kevin, Poole, Gregory B., Pracy, Michael, Sharp, Rob, Smillie, Jon, Spolaor, Max, Wisnioski, Emily, Woods, David, Wyder, Ted K. and Yee, Howard K.C. (2018) The WiggleZ dark energy survey: Final data release and the metallicity of UV-luminous galaxies. Monthly Notices of the Royal Astronomical Society, 474 3: 4151-4168. doi:10.1093/mnras/stx2963

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Author Drinkwater, Michael J.
Byrne, Zachary J.
Blake, Chris
Glazebrook, Karl
Brough, Sarah
Colless, Matthew
Couch, Warrick
Croton, Darren J.
Croom, Scott M.
Davis, Tamara M.
Forster, Karl
Gilbank, David
Hinton, Samuel R.
Jelliffe, Ben
Jurek, Russell J.
Li, I.-Hui
Christopher Martin, D.
Pimbblet, Kevin
Poole, Gregory B.
Pracy, Michael
Sharp, Rob
Smillie, Jon
Spolaor, Max
Wisnioski, Emily
Woods, David
Wyder, Ted K.
Yee, Howard K.C.
Title The WiggleZ dark energy survey: Final data release and the metallicity of UV-luminous galaxies
Journal name Monthly Notices of the Royal Astronomical Society   Check publisher's open access policy
ISSN 1365-2966
0035-8711
Publication date 2018-03-01
Year available 2018
Sub-type Article (original research)
DOI 10.1093/mnras/stx2963
Open Access Status File (Publisher version)
Volume 474
Issue 3
Start page 4151
End page 4168
Total pages 18
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Language eng
Abstract The WiggleZ Dark Energy Survey measured the redshifts of over 200 000 ultraviolet (UV)- selected (NUV < 22.8 mag) galaxies on the Anglo-Australian Telescope. The survey detected the baryon acoustic oscillation signal in the large-scale distribution of galaxies over the redshift range 0.2 < z < 1.0, confirming the acceleration of the expansion of the Universe and measuring the rate of structure growth within it. Here, we present the final data release of the survey: a catalogue of 225 415 galaxies and individual files of the galaxy spectra. We analyse the emission-line properties of these UV-luminous Lyman-break galaxies by stacking the spectra in bins of luminosity, redshift, and stellar mass. The most luminous (-25 mag < M < -22 mag) galaxies have very broad Hβ emission from active nuclei, as well as a broad second component to the [OIII] (495.9 nm, 500.7 nm) doublet lines that is blueshifted by 100 km s, indicating the presence of gas outflows in these galaxies. The composite spectra allow us to detect and measure the temperature-sensitive [O III] (436.3 nm) line and obtain metallicities using the direct method. The metallicities of intermediate stellar mass (8.8 < log (M*/M⊙) < 10)WiggleZ galaxies are consistent with normal emission-line galaxies at the samemasses. In contrast, the metallicities of high stellarmass (10 < log (M*/M⊙) < 12) WiggleZ galaxies are significantly lower than for normal emission-line galaxies at the same masses. This is not an effect of evolution as the metallicities do not vary with redshift; it is most likely a property specific to the extremely UV-luminous WiggleZ galaxies.
Keyword Cosmology: observations
Galaxies: abundances
Galaxies: photometry
Galaxies: starburst
Surveys
Ultraviolet: galaxies
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Authors Monthly Notices of the Royal Astronomical Society. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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Created: Fri, 09 Feb 2018, 02:31:55 EST