| Issue |
A&A
Volume 399, Number 1, February III 2003
|
|
|---|---|---|
| Page(s) | 51 - 61 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20021784 | |
| Published online | 05 February 2003 | |
GHASP: An Hα kinematic survey of spiral and irregular galaxies*
II. Velocity fields and rotation curves of 15 galaxies
Observatoire Astronomique Marseille-Provence & Laboratoire d'Astrophysique de Marseille, 2 place Le Verrier, 13248 Marseille Cedex 04, France
Corresponding author: O. Garrido, olivia.garrido@oamp.fr
Received:
8
August
2002
Accepted:
19
November
2002
We present Fabry-Perot images obtained during the GHASP survey (Gassendi Hα survey of
SPirals). We have derived the Hα maps, the 2D velocity fields and the rotation curves for a new set of 15 galaxies,
increasing the sample we plan to build. The majority of the
objects studied here are late-type spirals (Sc-Sdm) and irregular
galaxies. Only 8 galaxies have a regular and symmetric rotation curve
(two of them have a solid-body rotation curve) and they are all of morphological type earlier than 
. Five galaxies
present an irregular rotation curve and they are all very late-type galaxies (
). For one galaxy, UGC 2053,
no rotation curve could be derived, and for another one, UGC 11300, both sides have
completely different behaviors. All of them have already been observed in HI
by the WHISP survey led at Westerbork, for which GHASP brings an interesting
complement.
Key words: galaxies: kinematics and dynamics / galaxies: spiral / galaxies: irregular / galaxies: dwarf
© ESO, 2003
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