Systematics in virial mass estimators for pressure-supported systems

Raphaël Errani, Jorge Peñarrubia, Matthew G. Walker

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Mass estimators are a key tool to infer the distribution of dark matter in pressure-supported systems like dwarf spheroidal galaxies (dSphs). We construct an estimator for enclosed masses based on the virial theorem which is insensitive to anisotropy in the velocity dispersion and tailored to yield masses with minimum uncertainty introduced by our ignorance on (i) the shape of the inner halo profile, and (ii) how deeply the stellar component is embedded within the halo: $M(
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Publication statusPublished - 14 Sept 2018

Keywords / Materials (for Non-textual outputs)

  • Astrophysics - Astrophysics of Galaxies


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