Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-09-24
Astronomy and Astrophysics
Astrophysics
10 pages, accepted by Astronomy and Astrophysics
Scientific paper
Detailed BVRI-Halpha photometry has been obtained for the ring galaxy HRG 2302. This is probably a still interacting system which shows two principal components: the target, which is a knotted ringed-disk, and the intruder, an elongated galaxy with two substructures probably caused by the interaction. The existence of H II emission regions is suggested by Halpha images and medium dispersion spectra of the three brightest parts of this system. Analysis of a color-color diagram suggests recent star formation, in agreement with the behavior of interacting galaxies with nuclear emission. HRG 2302 has been previously classified as a Polar Ring galaxy (Faundez-Abans & de Oliveira-Abans 1998a), but we have reclassified it as Elliptical-Knotted, based on the morphological substructures found. This work reveals, for the first time, the existence of at least 15 fainter galaxies in the field within ~4 arcmin around HRG 2302, giving positions and integrated standard magnitudes for all of them.
Faundez-Abans Max
Myrrha M. L. M.
Oliveira-Abans M. de
Soares Domingos S. L.
Vaz Luiz P. R.
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