Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..390..188k&link_type=abstract
Pathways Through an Eclectic Universe ASP Conference Series, Vol. 390, proceedings of the conference held 23-27 April, 2007 at S
Astronomy and Astrophysics
Astronomy
Scientific paper
We present results derived from Hα images of 327 local galaxies from the HaGS (Hα Galaxy Survey), where we have correlated the star formation rates with the interaction characteristics of the galaxies. We see a significant increase in the star formation rate in galaxies with close neighbors, an increase which has probably been triggered by galaxy-galaxy interactions. But when we analyze the equivalent width of the Hα emission, which is the Hα flux normalized by the continuum emission, or a measure of the current compared to the average past star formation rate, we find that galaxies with close companions show no significant enhancement at all. Our conclusion is that although close neighbors and interactions increase the star formation rate, they do this continuously. When we define a starburst as a star formation event with a star formation rate that is currently higher than it has been on average in the past, we must thus conclude that the presence of a close companion does not lead to starburst activity.
James Phil A.
Knapen Johan H.
No associations
LandOfFree
Interactions and Star Formation in Galaxies 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 Interactions and Star Formation in Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interactions and Star Formation in Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1244349