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Cappellari, Michele; Emsellem, Eric
Publications of the Astronomical Society of the Pacific, 02/2004, Letnik: 116, Številka: 816Journal Article
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 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.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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