An H$_α$ Catalogue of Galaxies in Hickson Compact Groups. I. The Sample

Details An H$_α$ Catalogue of Galaxies in Hickson Compact Groups. I. The Sample An H$_α$ Catalogue of Galaxies in Hickson Compact Groups. I. The Sample

1999-04-29

arxiv.org/abs/astro-ph/9904410v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&AS, 22 pages, including 23 figures

Scientific paper

10.1051/aas:1999492

We present H$_\alpha$ photometry for a sample of 95 galaxies in Hickson Compact Groups obtained from observations of 31 groups. The Catalogue lists isophotal and adaptive aperture (Kron aperture) flux measurements for about 75% of the accordant galaxies inside the observed HCGs, 22 out of which are upper limits. Non standard data reduction procedures have been used to obtain the continuum subtracted H$_\alpha$ images for each HCG of the target sample. Flux calibration has also been performed in order to obtain H$_\alpha$ luminosities for the whole sample. Both the data reduction and calibration procedures are carefully described in this paper. The new data listed in this Catalogue are of great importance in understanding the star formation rate inside HCG galaxies and in giving new insights on its dependence on galaxy interactions.

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