2002/02/26 by P. Amram, Philippe Amram, Amram, Philippe +3
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Scientific Research and Discoveries #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0202475
14 pages, including 4 figures and 2 tables. Galaxies: the Third Dimension, Cozumel, Mexico 3-7 December 2001
arxiv created 2002/02/26 · openalex publication_date 2002/02/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
This survey, once completed, will provide a 3D sample of 200 nearby spiral and irregular galaxies in the Halpha line, using a Fabry-Perot system. The data cubes obtained for each galaxy allow derivation of lines maps, velocity fields and higher momentum. The goals of this survey are: (1) To constitute a 3D local reference. (2) To constrain the mass distribution. (3) To constrain the kinematics and dynamics of the internal regions. A data base will be built in order to provide the whole data to the community. The main result presented in this paper is that, for a sample of 19 late-type dwarfs, the HI rotation curves corrected for beam-smearing effects do not agree with the high resolution ones obtained with hybrid Halpha/HI data. The beam smearing correction done on the HI data is on average too strong. The rotation curves rise even more slowly when using hybrid Halpha/HI data than with HI data alone.