The fossil starburst in M82

Richard De Grijs*, Robert W. O'Connell, John S. Gallagher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We present high-resolution optical and near-infrared HST observations of two adjacent regions in the fossil starburst region in M82, M82 B1 and B2. The presence of both the active and the fossil starburst in M82 provides a unique physical environment to study the stellar and dynamical evolution of star cluster systems. The cluster population in B2 is more heavily affected by internal extinction than that in B1, amounting to an excess extinction in B2 of AV,excess ≃ 1.1 ± 0.3 mag. Preliminary age estimates date the cluster population in the fossil starburst between ∼ 2 × 108 and ∼ 109 years. The radial luminosity profiles of the brightest clusters are more closely approximated by power laws than by a Gaussian model, in particular in their wings, which favours a slow star formation scenario.

Original languageEnglish
Pages (from-to)397-404
Number of pages8
JournalAstrophysics and Space Science
Issue number2-4
Publication statusPublished - Mar 2001
Externally publishedYes


  • globular cluster
  • surface brightness
  • stellar population
  • star cluster
  • cluster population


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