BVRI-H alpha surface photometry of peculiar ring galaxies - I. HRG 2302

Citation
Mlm. Myrrha et al., BVRI-H alpha surface photometry of peculiar ring galaxies - I. HRG 2302, ASTRON ASTR, 351(3), 1999, pp. 860-868
Citations number
43
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
351
Issue
3
Year of publication
1999
Pages
860 - 868
Database
ISI
SICI code
0004-6361(199911)351:3<860:BASPOP>2.0.ZU;2-T
Abstract
Detailed BVRI-H alpha 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 interacti on. The existence of H II emission regions is suggested by H alpha images a nd medium dispersion spectra of the three brightest parts of this system. A nalysis of a color-color diagram suggests recent star formation, in agreeme nt with the behavior of interacting galaxies with nuclear emission. HRG 330 2 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 with in similar to 4' around HRG 2302, giving positions and integrated standard magnitudes for all of them.