HST/STIS Spectroscopy of the Starburst Core of M82

Details HST/STIS Spectroscopy of the Starburst Core of M82 HST/STIS Spectroscopy of the Starburst Core of M82

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329..227s&link_type=abstract

Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present HST/STIS spectroscopy for one slit position crossing the starburst core of M82, sampling both clusters and ionized gas at optical wavelengths. The spectra have a spatial resolution of 2 pc at the distance of M82, allowing us to probe the conditions within a starburst environment in unprecedented detail. We find that the ionized gas has high turbulent and thermal pressures (P/k ˜ 107), reflecting the intense energy input from supernovae concentrated in super star clusters. The data also provide new insights into young clusters and their immediate environments. We identify a 6--7 Myr old cluster, M82-A1, which is still embedded in a compact H II region.

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