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Galaxy and mass assembly (GAMA): The large-scale structure of galaxies and comparison to mock universes

Alpaslan, Mehmet; Robotham, Aaron S. G.; Driver, Simon; Norberg, Peder; Baldry, Ivan; Bauer, Amanda E.; Bland-Hawthorn, Joss; Brown, Michael; Cluver, Michelle; Colless, Matthew; Foster, Caroline; Hopkins, Andrew; Van kampen, Eelco; Kelvin, Lee; Lara-Lopez, Maritza A.; Liske, Jochen; Lopez-Sanchez, Angel R.; Loveday, Jon; Mcnaught-Roberts, Tamsyn; Merson, Alexander; Pimbblet, Kevin

Authors

Mehmet Alpaslan

Aaron S. G. Robotham

Simon Driver

Peder Norberg

Ivan Baldry

Amanda E. Bauer

Joss Bland-Hawthorn

Michael Brown

Michelle Cluver

Matthew Colless

Caroline Foster

Andrew Hopkins

Eelco Van kampen

Lee Kelvin

Maritza A. Lara-Lopez

Jochen Liske

Angel R. Lopez-Sanchez

Jon Loveday

Tamsyn Mcnaught-Roberts

Alexander Merson



Abstract

From a volume-limited sample of 45 542 galaxies and 6000 groups with z ≤ 0.213, we use an adapted minimal spanning tree algorithm to identify and classify large-scale structures within the Galaxy And Mass Assembly (GAMA) survey. Using galaxy groups, we identify 643 filaments across the three equatorial GAMA fields that span up to 200 h -1 Mpc in length, each with an average of eight groups within them. By analysing galaxies not belonging to groups, we identify a secondary population of smaller coherent structures composed entirely of galaxies, dubbed 'tendrils' that appear to link filaments together, or penetrate into voids, generally measuring around 10 h -1 Mpc in length and containing on average six galaxies. Finally, we are also able to identify a population of isolated void galaxies. By running this algorithm on GAMA mock galaxy catalogues, we compare the characteristics of large-scale structure between observed and mock data, finding that mock filaments reproduce observed ones extremely well. This provides a probe of higher order distribution statistics not captured by the popularly used two-point correlation function. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

Journal Article Type Article
Publication Date Feb 11, 2014
Journal Monthly notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press (OUP)
Peer Reviewed Peer Reviewed
Volume 438
Issue 1
Pages 177-194
APA6 Citation Alpaslan, M., Robotham, A. S. G., Driver, S., Norberg, P., Baldry, I., Bauer, A. E., …Pimbblet, K. (2014). Galaxy and mass assembly (GAMA): The large-scale structure of galaxies and comparison to mock universes. Monthly notices, containing papers, abstracts of papers, and reports of the proceedings of the Society, 438(1), 177-194. https://doi.org/10.1093/mnras/stt2136
DOI https://doi.org/10.1093/mnras/stt2136
Keywords Large-scale structure of Universe
Publisher URL http://mnras.oxfordjournals.org/content/438/1/177
Copyright Statement © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society

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Copyright Statement
© 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society





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