The void galaxy survey: photometry, structure and identity of void galaxies
نویسندگان
چکیده
منابع مشابه
Cosmology with void-galaxy correlations.
Galaxy bias, the unknown relationship between the clustering of galaxies and the underlying dark matter density field is a major hurdle for cosmological inference from large-scale structure. While traditional analyses focus on the absolute clustering amplitude of high-density regions mapped out by galaxy surveys, we propose a relative measurement that compares those to the underdense regions, c...
متن کاملVoid Statistics in Large Galaxy Redshift Surveys: Does Halo Occupation of Field Galaxies Depend on Environment?
We use measurements of the projected galaxy correlation function wp(rp) and galaxy void statistics to test whether the galaxy content of halos of fixed mass is systematically different in low density environments. We present new measurements of the void probability function (VPF) and underdensity probability function (UPF) from Data Release Four of the Sloan Digital Sky Survey (SDSS), as well a...
متن کاملThe Mass Function of Void Galaxies in the Sloan Digital Sky Survey Data Release 2
We estimate the mass function of void galaxies in the second public data release of the Sloan Digital Sky Survey from a sample of 1000 galaxies with local density contrasts of v < 0:6. The galaxy sample is split into ellipticals and spirals using a color-Sérsic index criterion. We estimate the virial masses of ellipticals using the measured spectral line widths along with the observed size. Pro...
متن کاملThe Luminosity Function of Void Galaxies in the Sloan Digital Sky Survey
The Sloan Digital Sky Survey now extends over a large enough region that galaxies in low density environments can be detected. Rojas et al. have developed a technique to extract more than 1000 void galaxies with δρ/ρ < −0.6 on scales r > 7h−1Mpc from the SDSS. In this paper, we present the luminosity function of these galaxies and compare it to that of galaxies at higher densities. We obtain a ...
متن کاملOnly the Lonely: H I Imaging of Void Galaxies
We have completed a pilot survey imaging 15 SDSS selected void galaxies in H i in local (d=50 to 100 Mpc) voids. This small sample makes up a surprisingly interesting collection of galaxies, consisting of galaxies with asymmetric and perturbed H i disks, previously unidentified companions, and ongoing interactions. One was found to have a polar H i disk with no stellar counterpart. While our sm...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2016
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stw2362