Evolution of M81 with Exponentially Decreasing Star Formation Rate of PEGASE

Details Evolution of M81 with Exponentially Decreasing Star Formation Rate of PEGASE Evolution of M81 with Exponentially Decreasing Star Formation Rate of PEGASE

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004chjaa...4..143l&link_type=abstract

Chinese Journal of Astronomy & Astrophysics, Vol. 4, p. 143-152

Astronomy and Astrophysics

Astrophysics

7

Galaxies: Individual (M81), Galaxies: Evolution, Galaxies: Star General

Scientific paper

Based on the large field multicolor observations of Beijing-Arizona-Taiwan-Connecticut (BATC) program, we obtain the spectral energy distribution (SED) for individual regions of M81. We study the structure and evolution of M81 with an evolutionary population synthesis (EPS) model, PEGASE. We find that the exponentially deceasing star formation rate (SFR) with star formation scale 3 Gyr (hereafter Exp, τ=3 Gyr) gives the best agreement between the model predictions and the observed SEDs. We then obtain the structure, age distribution and evolutionary history of M81. There is a clear age gradient between the central and outer regions. The populations in the central regions are older than 7 Gyr, those in the outer regions are younger, at about 4.5 Gyr. The youngest components in the spiral arms have ages of about 2.5 Gyr or less.

Affiliated with

Also associated with

No associations

Rating

Evolution of M81 with Exponentially Decreasing Star Formation Rate of PEGASE 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 Evolution of M81 with Exponentially Decreasing Star Formation Rate of PEGASE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of M81 with Exponentially Decreasing Star Formation Rate of PEGASE will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1388237