Bibcode
DOI
Iglesias-Páramo, J.; Vílchez, J. M.
Bibliographical reference
The Astronomical Journal, Volume 115, Issue 5, pp. 1791-1800.
Advertised on:
5
1998
Citations
11
Refereed citations
10
Description
Results from Hα + continuum and Johnson UBVI imaging for HCG 95
are presented in order to study the star formation history of the
galaxies in the group. Based on the spatial distribution of the stellar
populations, as well as the morphology of the three-galaxy system
A-C1-C2, we propose two possible scenarios for the dynamical evolution
of this system: In one of them, each of the nuclei C1 and C2 interacted
with the elliptical galaxy at different times, and we are seeing both
nuclei together as a projection effect. The other scenario suggests that
both nuclei are involved in a merging process, with the resulting merger
remnant interacting with the elliptical galaxy. The recent star
formation of the system is strongly balanced toward the northern tidal
tail and the nucleus C1. We note the presence of a candidate of a young
dwarf galaxy which would have been created at the tip of one of the
northern tidal tails. A very young population and no signs of an
underlying population were detected for this object. Recent
spectroscopic observations of the galaxy HCG 95 B yielded a value for
its radial velocity of 8000 km s^-1, that is, more than 3000 km s^-1
less than the rest of galaxies in the group. This new result would imply
that galaxy B is a foreground galaxy instead of being physically
associated with the group HCG 95. This galaxy appears distorted probably
as a result of the close passage of a dwarf satellite that has been
detected in the broadband frames and in Hα.