New parametrizations of non-Gaussian line-of-sight velocity distribution

Hong Sheng Zhao*, Francisco Prada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A five-parameter fitting formula for the line-of-sight stellar velocity distributions (LOSVDs) 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 the assumptions of van der Marel & Franx and Kuijken & Merrifield, the LOSVDs are required to have neither multipeaks nor negative velocity wings and most information can be recovered from no more than five physically meaningful fitting parameters.

Original languageEnglish
Pages (from-to)1223-1235
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
Publication statusPublished - 1 Jan 1996


  • Galaxies: kinematics and dynamics
  • Line: profiles


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