Document Type

Article

Publication Date

3-2014

Department

Physics and Astronomy

Abstract

Based 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.

Comments

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Copyright: 2014. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

https://doi.org/10.1093/mnrasl/slu019

Original Publication Information

Alpaslan, Mehmet, et al. "Galaxy and Mass Assembly (GAMA): Fine Filaments of Galaxies Detected Within Voids." 2014. Monthly Notices of the Royal Astronomical Society 440(1): L106-L110.

DOI

10.1093/mnrasl/slu019

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