H alpha kinematics of 11 starburst galaxies selected from the Sloan Digital Sky Survey
2013 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 435, no 3, 1958-1983 p.Article in journal (Refereed) Published
We present analysis of Fabry-Perot interferometric observations for a sample of 11 starburst galaxies with redshift z less than or similar to 0.03 selected from the Sloan Digital Sky Survey. We have targeted the H alpha lambda 6562.78 emission line at spatial sampling of 0.2arcsec-0.4 arcsec and at spectral resolution of R similar to 16 000. Studying two-dimensional maps for the velocity, velocity dispersion, line emission and continuum deliver new insights into the nature of starburst and postburst galaxies. The velocity fields are fitted to an exponential disc model, providing scalelengths and masses, to be compared with the photometric scalelength and the mass estimated from the velocity dispersions. From the line emission, the star formation rates are also calculated and compared with values in the literature. We have found that between 55 and 64 per cent of our sample show large-scale dominating rotation, while 27 per cent show local rotation typically restricted to the central part of each system. The morphology and line profiles in the centre of eight objects are consistent with a recent merger, while another two seem to be involved in a accretion process which, for the moment, has not disrupted their kinematics.
Place, publisher, year, edition, pages
2013. Vol. 435, no 3, 1958-1983 p.
galaxies: fundamental parameters, galaxies: kinematics and dynamics, galaxies: starburst
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-96088DOI: 10.1093/mnras/stt1387ISI: 000325773000010OAI: oai:DiVA.org:su-96088DiVA: diva2:664236
Alfred P. Sloan Foundation; National Science Foundation; US Department of Energy; National Aeronautics and Space Administration; Japanese Monbukagakusho; Max Planck Society; Higher Education Funding Council for England; Nordic Optical Telescope Scientific Association (NOTSA;) Knut and Alice Wallenberg Foundation; Swedish research council (VR); Swedish National Space Board (SNSB;) Spanish Ministry of Science and Innovation AYA2007-67625-CO2-01; Instituto de Astrofisica de Canarias 3E 310386; Swedish Research Council (Vetenskapsradet) 2013-11-142013-11-112013-11-14Bibliographically approved