Parametric Recovery of Line‐of‐Sight Velocity Distributions from Absorption‐Line Spectra of Galaxies via Penalized Likelihood

Cappellari, Michele; Emsellem, Éric

doi:10.1086/381875

Public

Parametric Recovery of Line‐of‐Sight Velocity Distributions from Absorption‐Line Spectra of Galaxies via Penalized Likelihood

Published in Publications of the Astronomical Society of the Pacific • Feb 1, 2004

Authors:

Michele Cappellari

Éric Emsellem

Abstract

We investigate the accuracy of the parametric recovery of the line-of-sight velocity distribution (LOSVD) of the stars in a galaxy, while working in pixel space. Problems appear when the data have a low signal-to-noise ratio, or the observed LOSVD is not well sampled by the data. We propose a simple...

Subject

Galaxy

Physics

Stellar kinematics

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