HI and Hα Mapping of M31 & M33
- Proceedings of the International Astronomical Union , 6 : 116-120
Résumé
Résumé We performed a deep H i and Hα mapping of M31 and M33 in order to get accurate kinematical data of those two galaxies and also to make a comparison between the H i and Hα kinematics. The H i data were obtained with the DRAO interferometer and the Hα data with the Fabry-Perot system of the Observatoire du mont Mégantic using an EMCCD as a detector. These data will give us the best possible datasets to derive accurate rotation curves and mass models for those two Local Group spirals and provide some new data for the H ii regions studies of these galaxies. While the H i observations are of low resolution (~1 arcmin), the high resolution of the Hα data (~1 arcsec) should allow us to get much more details in the central regions, allowing at the same time a much better determination of the kinematical parameters. Hence, the inner part of the rotation curve, so inportant to constraint properly the mass models, will be determined more accurately.
Mots-clés
Galaxy rotation curve, Physics, Galaxy, Local Group, Astrophysics, Rotation (mathematics), Resolution (logic), Kinematics, Computer science, Dwarf galaxy, Galaxy formation and evolution, Artificial intelligence