Radio Constraints on the Starburst Ages of Two Wolf-Rayet Galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

4

Galaxies: Individual: Alphanumeric: F08208+2816, Galaxies: Individual: Name: Markarian 1039, Galaxies: Starburst, Stars: Wolf-Rayet

Scientific paper

Mrk 1039 and IRAS F08208+2816 are two new Wolf-Rayet galaxies whose optical spectroscopic observations suggest that star formation in these galaxies occurs in brief bursts for starburst ages of only ~4×106 yr. Other observational diagnostics are needed to measure the contributions of older and less massive stars to the total luminosity of Wolf-Rayet galaxies. Both far-infrared (FIR) and radio continuum emission provide such diagnostics for stars with masses as low as 5Msolar and lifetimes of several times 107 yr. We observed these two Wolf-Rayet galaxies at 20, 6, and 2 cm wavelengths using the B, C, and D configurations of the VLA, respectively. Mrk 1039 contains a fairly small (dr<500 pc), primarily thermal radio source whose FIR/radio flux ratio is consistent with the isolated H II region expected if the starburst in Mrk 1039 is really very young (τ~4×106 yr). In contrast, F08208+2816 has a nonthermal radio spectrum and obeys the FIR/radio correlation. These two radio properties indicate that the young Wolf-Rayet starburst in F08208+2816 is embedded in a large and luminous galaxy that has hosted comparably luminous starburst activity extending >~3×107 yr in the past.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Radio Constraints on the Starburst Ages of Two Wolf-Rayet 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 Radio Constraints on the Starburst Ages of Two Wolf-Rayet Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio Constraints on the Starburst Ages of Two Wolf-Rayet Galaxies will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1087019

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.