GHASP. A 3D Survey of Spiral and Irregular Galaxies at Halpha. Comparison between low and high resolution rotation curves of late-type dwarf galaxies

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dc.creatorAmram, Philippe
dc.creatorGarrido, Olivia
dc.date2002-02-26
dc.date.accessioned2026-07-07T02:02:55Z
dc.date.available2026-07-07T02:02:55Z
dc.descriptionThis 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.
dc.description14 pages, including 4 figures and 2 tables. Galaxies: the Third Dimension, Cozumel, Mexico 3-7 December 2001
dc.identifierhttps://arxiv.org/abs/astro-ph/0202475
dc.identifierhttp://arxiv.org/abs/astro-ph/0202475
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4212
dc.subjectAstrophysics
dc.titleGHASP. A 3D Survey of Spiral and Irregular Galaxies at Halpha. Comparison between low and high resolution rotation curves of late-type dwarf galaxies
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