New Parametrizations of Non-Gaussian Line-of-sight Velocity Distribution
Astrophysics
2015-06-24 v1
Abstract
A five-parameter fitting formula for the line-of-sight stellar velocity distributions of steady state systems is proposed. It can faithfully reproduce velocity distributions of theoretical models ranging from nearly Gaussian profiles to strongly skewed or mildly double-peaked profiles. In contrast to van der Marel and Franx (1993) and Kuijken and Merrifield (1993), the line profiles are required to have neither multi-peaks nor negative velocity wings. Information of the profile is mostly specified by five physically meaningful and nearly orthogonal fitting parameters.
Cite
@article{arxiv.astro-ph/9512066,
title = {New Parametrizations of Non-Gaussian Line-of-sight Velocity Distribution},
author = {HongSheng Zhao and Francisco Prada},
journal= {arXiv preprint arXiv:astro-ph/9512066},
year = {2015}
}
Comments
submitted to MNRAS; 22 pages with 3 tables and 8 figures in uuencoded compressed PS file. Also available at ftp://ibm-1.mpa-garching.mpg.de/pub/hsz/profile.uu