Refereed journal article or data article (A1)

Total mass beyond r 200 for systems with different density profile laws within a Λ background




List of Authors: Teerikorpi Pekka, Heinämäki Pekka, A. D. Chernin

Publisher: WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Publication year: 2018

Journal: Astronomical Notes / Astronomische Nachrichten

Volume number: 339

Issue number: 9-10

Number of pages: 4

ISSN: 0004-6337

eISSN: 1521-3994

DOI: http://dx.doi.org/10.1002/asna.201813529


Abstract

Virial masses within some radius in a galaxy system tend to undervalue the true total
mass. Here, we quantify this effect for the standard mass M(r 200 ) up to the radius
within which the mean density is 200ρ crit . We derive the masses up to the zero-gravity
radius r max , for a few common density profile laws: the isothermal, the Hernquist, and
the Navarro–Frenk–White profiles, relative to the mass M(r 200 ). Graphs show how
much mass could be missed at different radii, which can be a few M(r 200 ) up to the
zero-gravity radius r max . One result is that less-concentrated halos can be larger and
more massive up to r max , relative to M(r 200 ). These data are useful for applications
involving masses of galaxy systems and haloes.


Last updated on 2021-24-06 at 10:39