Astron. Astrophys. Suppl. Ser. 132, 55-63

H$\alpha$ objective prism survey of Abell 1060

S.M. Bennett ¹ and C. Moss ²

1 - Institute of Astronomy, Madingley Road, Cambridge, CB3 0HA, UK
2 - Blackett Laboratory, Imperial College of Science, Technology, and Medicine, Prince Consort Road, London, SW7 2BZ, UK

Received January 22; accepted March 24, 1998

Abstract:

As part of a continuing study of the effect of cluster environment on the star formation properties of galaxies, we have undertaken an H$\alpha$ objective prism survey of the nearby cluster, Abell 1060. We detect 33 galaxies in emission, 24 of which are cluster members. We present new radial velocity measurements and H$\alpha$ + [Nii] equivalent widths and fluxes for a number of these galaxies. We distinguish between galaxies with diffuse and compact emission, the latter having been associated in previous work with a disturbed morphology of the galaxy and most likely resulting from tidally-induced star formation from galaxy-galaxy or cluster-galaxy interactions. The fraction of cluster spirals in Abell 1060 detected with compact emission agrees with the expected fraction for a cluster of its richness, as derived from results of a previous survey of 8 clusters. Some of the detected cluster early-type spirals exhibit anomalously high global H$\alpha$ equivalent widths, as compared to galaxies of similar type in the field.

Key words: galaxies: clusters: general -- galaxies: clusters: individual: Abell 1060 -- galaxies: spiral -- galaxies: starburst