Interpreting the galaxy group CG J1720-67.8 through evolutionary synthesis models

Details Interpreting the galaxy group CG J1720-67.8 through evolutionary synthesis models Interpreting the galaxy group CG J1720-67.8 through evolutionary synthesis models

2005-09-30

arxiv.org/abs/astro-ph/0509905v1

Astronomy and Astrophysics

Astrophysics

19 pages, 15 figures out of which one in jpeg format. Accepted for publication in A&A on 22/09/2005

Scientific paper

10.1051/0004-6361:20053576

This paper is part of a series devoted to a detailed analysis of the properties of the compact group CG J1720-67.8 and its member galaxies with the aim of sheding light on its evolutionary history. Here we interpret our previously published observational results through comparison with chemically consistent spectrophotometric evolutionary synthesis models in order to gain further clues to the evolutionary history of the galaxies in this group. In order to reduce the number of free parameters, we considered the simplest case of a single burst of star formation turned on after 11 - 12 Gyr of undisturbed galaxy evolution. However, we also briefly explore the effect of multiple, interaction-induced bursts of star formation. We find that the two spiral galaxies are consistent with interaction induced strong starbursts switched on \~ 40 to 180 Myr ago and still active. For the early-type galaxy a <~ 0.9 - 1.3 Gyr old star formation event (depending on the considered model) appears consistent with observed properties. The comparison with models cannot rule out the possibility that this galaxy is already the result of a merger. Alternatively, a star formation episode in this galaxy might have been triggered by a gas inflow as a consequence of the interaction with the companion galaxies. Estimates of galaxy masses are derived from the comparison with the models. Finally our results are discussed in comparison with other well studied poor galaxy systems.

Affiliated with

Also associated with

No associations

Rating

Interpreting the galaxy group CG J1720-67.8 through evolutionary synthesis models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Interpreting the galaxy group CG J1720-67.8 through evolutionary synthesis models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interpreting the galaxy group CG J1720-67.8 through evolutionary synthesis models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-683842