A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä

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




TekijätTeerikorpi Pekka, Heinämäki Pekka, A. D. Chernin

KustantajaWILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Julkaisuvuosi2018

JournalAstronomical Notes / Astronomische Nachrichten

Vuosikerta339

Numero9-10

Aloitussivu705

Lopetussivu708

Sivujen määrä4

ISSN0004-6337

eISSN1521-3994

DOIhttps://doi.org/10.1002/asna.201813529


Tiivistelmä

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 2024-26-11 at 20:09