期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 429, 期 4, 页码 2903-2909出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts495
关键词
line: profiles; technique: radial velocities; surveys; galaxies: kinematics and dynamics
资金
- Instituto de Astrofisica de Canarias
- Spanish Ministerio de Economia y Competitividad (MINECO) [AYA2009-12903]
- Spanish Agencia Canaria de Investigacion, Innovacion y Sociedad de la Informacion [proID20100121]
The presence of double-peaked/multi-component emission-line profiles in the spectra of galaxies is commonly identified by visual inspection. However, the identification of complex emission-line profiles by eye is unlikely for large data bases such as the Sloan Digital Sky Survey (SDSS) or the integral field spectroscopy surveys of galaxies (e.g. Calar Alto Legacy Integral Field Area Survey or The Mapping Nearby Galaxies at APO). We describe a quick method involving a cross-correlation technique for detecting the presence of complex (double-peaked or multiple components) profiles in the spectra of galaxies, deriving simultaneously a first estimation of the velocity dispersions and radial velocities of the dominant gaseous component. We illustrate the proposed procedure with the well-known complex [O III]lambda lambda 4959, 5007 profiles of the central region of NGC 1068.
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