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2000AJ....120.1273J - Astron. J., 120, 1273-1288 (2000/September-0)
Hubble space telescope observations of He 2-10: outflows and young super-star clusters.
JOHNSON K.E., LEITHERER C., VACCA W.D. and CONTI P.S.
Abstract (from CDS):
GHRS UV spectra were obtained for sections of the two starburst regions and were used to determine the parameters of the starburst regions. For a stellar population produced in a single burst with stellar masses between 1 and 100 M☉, the UV luminosities indicate regions A and B have masses between 1.6-2.6x106 M☉ and 2.6-6.6x104 M☉, respectively. The total starburst mass was between 1 and 100 M☉ consistent with the UV luminosity ranges between 1.6 and 2.6x106 M☉ and 2.6 and 6.6x104 M☉ for regions A and B, respectively. The observed integrated Hα flux is similar to that predicted by the models, implying that the leakage and/or dust absorption of Lyman continuum photons from the starburst regions is small. The integrated Hα equivalent widths of the two regions are substantially smaller than predicted. We attribute this to contamination by the continuum in the starburst regions (the starburst knots do not uniformly fill the GHRS apertures).
The UV spectroscopy of starburst region A indicates a large-scale outflow of the interstellar medium of He 2-10 with speeds of at least 360 km.s–1 and a total mass of at least 106 M☉. We estimate that the mass in metals which He 2-10 will expel is enough to raise primordial abundances in ~1 Mpc3 to 10–3 to 10–2 solar.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Interactions - Galaxies: Starburst - Galaxies: Star Clusters
Simbad objects: 7
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