A complex stellar line-of-sight velocity distribution in the lenticular galaxy NGC 524
I. Katkov, I. Chilingarian, O. Sil'chenko, A. Zasov, V. Afanasiev
TL;DR
This paper investigates the complex stellar velocity distribution in galaxy NGC 524, revealing asymmetries and multiple kinematic components through advanced spectroscopic analysis.
Contribution
It introduces a detailed analysis of the LOSVD in NGC 524 using novel nonparametric and parametric methods on spectroscopic data, uncovering complex kinematic structures.
Findings
Detection of strong asymmetry in the stellar LOSVD
Identification of two Gaussian kinematic components with different stellar populations
Insights into the origin of the complex LOSVD in NGC 524
Abstract
We present the detailed study of the stellar and gaseous kinematics of the luminous early-type galaxy NGC 524 derived from the long-slit spectroscopic observations obtained with the Russian 6-m telescope and the IFU data from the SAURON survey. The stellar line-of-sight velocity distribution (LOSVD) of NGC 524 exhibits strong asymmetry. We performed the comprehensive analysis of the LOSVD using two complementary approaches implemented on top of the nbursts full spectral fitting technique, (a) a nonparametric LOSVD recovery and (b) a parametric recovery of two Gaussian kinematical components having different stellar populations. We discuss the origin of the complex stellar LOSVD of NGC 524.
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