The existence of an extended component of diffuse ionized gas (DIG) is a well-known property of spiral galaxies. The integrated ensuremath {{H}alpha }...

We carried out a photometric analysis of a sample of early-type galaxies in Abell~1689 at z = 0.183, using HST/ACS archive images in the rest-frame V band. We...

We report on follow-up studies of transient events and objects, which have been conducted in recent years using ground-based optical observations. BVRI...

Shakhbazian compact galaxy groups are the most dense configurations known. A few years ago we commenced a detailed spectral and photometric study of these...

We continue the presentation of the results of detailed spectroscopic and photometric study of Shakhbazian compact galaxy groups. They belong to the interesting...

Several observational studies and numerical simulations suggest that mergers must contribute to the evolution of galaxies; however, the role that they play is...

We have derived the photometric parameters for the structural components of a sample of fourteen SB0 galaxies by applying a parametric photometric decomposition...

We present a catalog of 2990 extended sources in a 1° × 1° area centered on M33 using the MegaCam camera on the 3.6 m Canada-France-Hawaii Telescope. The...

We present the SWIRE Photometric Redshift Catalogue 1025119 redshifts of unprecedented reliability and of accuracy comparable with or better than previous work...