3D Spectroscopy of Blue Compact Galaxies. Diagnostic Diagrams

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dc.creatorMartinez-Delgado, Ismael
dc.creatorTenorio-Tagle, Guillermo
dc.creatorMunoz-Tunon, Casiana
dc.creatorMoiseev, Alexei V.
dc.creatorCairos, Luz M.
dc.date2007-03-08
dc.date.accessioned2026-07-07T11:21:17Z
dc.date.available2026-07-07T11:21:17Z
dc.descriptionHere we present the analysis of 3D spectroscopic data of three Blue Compact Galaxies (Mrk324, Mrk370, and IIIZw102). Each of the more than 22500 spectra obtained for each galaxy has been fitted by a single gaussian from which we have inferred the velocity dispersion (sigma), the peak intensity (Ipeak), and the central wavelength (lambda_c). The analysis shows that the sigma vs Ipeak diagrams look remarkably similar to those obtained for giant extragalactic HII regions. They all present a supersonic narrow horizontal band that extends across all the range of intensities and that result from the massive nuclear star-forming regions of every galaxy. The sigma vs Ipeak diagrams present also several inclined bands of lower intensity and an even larger sigma, arising from the large galactic volumes that surround the main central emitting knots. Here we also show that the sigma vs lambda_c and lambda_c vs Ipeak diagrams, are powerful tools able to unveil the presence of high and low mass stellar clusters, and thus allow for the possibility of inferring the star formation activity of distant galaxies, even if these are not spatially resolved.
dc.description15 pages, 3 figures, accepted for publication in The Astronomical Journal
dc.identifierhttps://arxiv.org/abs/astro-ph/0703165
dc.identifierhttp://arxiv.org/abs/astro-ph/0703165
dc.identifierAstron.J.133:2892-2897,2007
dc.identifierdoi:10.1086/515438
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194219
dc.subjectAstrophysics
dc.title3D Spectroscopy of Blue Compact Galaxies. Diagnostic Diagrams
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