Other
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...20311505j&link_type=abstract
American Astronomical Society Meeting 203, #115.05; Bulletin of the American Astronomical Society, Vol. 35, p.1392
Other
Scientific paper
Observations in the near-IR to radio regimes are critical for studying the earliest stages of starbursts due to the substantial obscuration associated with the star formation phenomenon. In order to see into the natal material, we observed the Wolf-Rayet galaxy Haro 3 (Mrk 35, NGC 3353) in the near-IR and radio regimes. These observations confirm that the current episode of star formation is dominated by a single region with an age of ˜ 0.1 - 5 Myr. A comparison with observations from HST indicates that one or more of the young star clusters are optically obscured. The star cluster that appears to be the youngest also exhibits a near-IR excess in its colors, possibly indicating natal dust in very close proximity to the ionizing stars. The difference between optical- and radio-determined ionizing fluxes as well as the near-IR colors indicate an average extinction value of AV ≈ 2.5 in the starburst region, although the extinction must reach significantly higher values in certain locations. The total stellar mass associated with the current starburst knots is inferred from both the near-IR and radio observations to be ˜ 106 M&sun;, consistent with young massive clusters observed in other galaxies.
Indebetouw Remy
Johnson Kelsey E.
Kobulnicky Henry A.
Watson Christer
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