Bibcode
Blasco-Herrera, J.; Fathi, K.; Beckman, J. E.; Gutiérrez, L.; Lundgren, A.; Epinat, B.; Östlin, G.; Font, J.; Hernandez, O.; de Denus-Baillargeon, M.-M.; Carignan, C.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 407, Issue 4, pp. 2519-2529.
Advertised on:
10
2010
Citations
19
Refereed citations
17
Description
We present the integrated Hα emission line profile for 157 HII
regions in the central 3.4 × 3.4 arcmin2 of the galaxy
M83 (NGC 5236). Using the Fabry-Perot interferometer GHαFAS, on
the 4.2-m William Herschel Telescope on La Palma, we show the importance
of a good characterization of the instrumental response function for the
study of line profile shapes. The luminosity-velocity dispersion
relation is also studied, and in the log(L)-log(σ) plane we do not
find a linear relation, but an upper envelope with equation
log(LHα) = 0.9 log(σ) + 38.1. For the adopted
distance of 4.5 Mpc, the upper envelope appears at the luminosity L =
1038.5ergs-1, in full agreement with previous
studies of other galaxies, reinforcing the idea of using HII regions as
standard candles.
Related projects
Kinematic, Structural and Composition Studies of the Interstellar and Intergalactic Media
The basic objective of the broject is to investigate the evolution of galaxies by deepening our understanding of the interaction between the insterstellar medium and the stars.The main technique which we use is the two-dimensional kinematic study of whole galaxies observed using our instrument:GHaFaS, a Fabry-Perot interferometer on the William
Prof.
John E. Beckman