Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21920301n&link_type=abstract
American Astronomical Society, AAS Meeting #219, #203.01
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results from a deeper survey of Luminous Supernova (LSN) hosts with the Galaxy Evolution Explorer (GALEX). We have added new, multiple kilo-second observations to our original observations of seventeen LSN hosts providing better constraints on their physical properties. We place the LSNe hosts on the galaxy NUV-r versus M(r) color magnitude diagram (CMD) with a larger comparison sample ( 26,000) to illustrate the extreme nature of these galaxies. The LSN hosts favor low-density regions of the galaxy CMD falling on the blue edge of the blue cloud toward the low luminosity end. The new observations provide tighter constraints on the star formation rates (SFRs) and stellar masses, M(*), and show that the LSNe result from regions of high specific star formation and yet low total SFR. This regime is of particular interest for exploring the upper end of the stellar IMF and its variation. If our understanding of the progenitors of the LSNe leans toward very massive (> 200 M_sun) progenitors, the potential for a conflict with IMF theory exists because the conditions found in the hosts producing the LSNe should not create such massive stars. If it also required that LSNe can only be produced in primordial or very low metallicity environments, then they will also provide
evidence for strong variation in metallicity within a dwarf galaxy, since their masses are consistent with low, but not extreme metallicity.
No associations
LandOfFree
The Extreme Hosts of Extreme Supernovae 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 The Extreme Hosts of Extreme Supernovae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Extreme Hosts of Extreme Supernovae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1577417