MNRAS-2014-Alpaslan-L106-10.pdf (862.56 kB)
Galaxy and Mass Assembly (GAMA): fine filaments of galaxies detected within voids
journal contribution
posted on 2023-06-08, 21:14 authored by Mehmet Alpaslan, Aaron S G Robotham, Danail Obreschkow, Samantha Penny, Simon Driver, Peder Norberg, Sarah Brough, Michael Brown, Michelle Cluver, Benne Holwerda, Andrew M Hopkins, Eelco van Kampen, Lee S Kelvin, Maritza A Lara-Lopez, Jochen Liske, Jonathan LovedayJonathan Loveday, Smriti Mahajan, Kevin PimbbletBased on data from the Galaxy and Mass Assembly (GAMA) survey, we report on the discovery of structures that we refer to as ‘tendrils’ of galaxies: coherent, thin chains of galaxies that are rooted in filaments and terminate in neighbouring filaments or voids. On average, tendrils contain six galaxies and span 10 h-1?Mpc. We use the so-called line correlation function to prove that tendrils represent real structures rather than accidental alignments. We show that voids found in the Sloan Digital Sky Survey, 7th data release survey that overlap with GAMA regions contain a large number of galaxies, primarily belonging to tendrils. This implies that void sizes are strongly dependent on the number density and sensitivity limits of a survey. We caution that galaxies in low-density regions, which may be defined as ‘void galaxies,’ will have local galaxy number densities that depend on such observational limits and are likely higher than those can be directly measured.
History
Publication status
- Published
File Version
- Published version
Journal
Monthly Notices of the Royal Astronomical Society: LettersISSN
1745-3925Publisher
Oxford University PressExternal DOI
Issue
1Volume
440Page range
L106-L110Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2015-06-24First Open Access (FOA) Date
2015-06-24First Compliant Deposit (FCD) Date
2015-06-24Usage metrics
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