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

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dc.creatorCappellari, Michele
dc.creatorEmsellem, Eric
dc.date2003-12-08
dc.date.accessioned2026-07-07T10:47:45Z
dc.date.available2026-07-07T10:47:45Z
dc.descriptionWe 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 solution based on maximum penalized likelihood and we apply it to the common situation in which the LOSVD is described by a Gauss-Hermite series. We compare different techniques by extracting the stellar kinematics from observations of the barred lenticular galaxy NGC 3384 obtained with the SAURON integral-field spectrograph.
dc.description7 pages, 7 figures, LaTeX (uses emulateapj). To appear in PASP, v.116, 2004 February. Software implementing the pPXF method described in this paper is available at http://www.strw.leidenuniv.nl/~mcappell/idl/
dc.identifierhttps://arxiv.org/abs/astro-ph/0312201
dc.identifierhttp://arxiv.org/abs/astro-ph/0312201
dc.identifierPubl.Astron.Soc.Pac.116:138,2004
dc.identifierdoi:10.1086/381875
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183644
dc.subjectAstrophysics
dc.titleParametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
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