Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.6903h&link_type=abstract
American Astronomical Society, 189th AAS Meeting, #69.03; Bulletin of the American Astronomical Society, Vol. 28, p.1361
Astronomy and Astrophysics
Astronomy
Scientific paper
The Hopkins Ultraviolet Telescope (HUT) observed four starburst galaxies during the Astro-2 mission in 1995 March. Leitherer et al. (1995, ApJ 454, L19) use these data to constrain the flux emerging just below the redshifted Lyman limit, and, by comparison to the Balmer line flux, the escape fraction for ionizing photons (typically found to be less than 3%). This result has implications for the ionization of the intergalactic medium, and so merits a detailed study. Leitherer et al. included an extinction correction, but neglected gas phase interstellar absorption longward of 915 Å. We have calculated the transmission of our Galaxy's interstellar medium along the four sight lines, including the effects of the H I Lyman lines and features of the more abundant elements, assuming a line-of-sight velocity distribution based on 21 cm measurements. We find that there is significant gas phase attenuation at the wavelengths of interest, loosening the constraints on the escape fraction. Quantitative results will be available by the Toronto meeting. This work is supported by NASA grant NAG5-696.
Dixon William Van Dyke
Hurwitz Margaret M.
Jelinsky Pat
No associations
LandOfFree
Observing Near the Galactic Lyman Limit: Revisions to the Ionizing Flux from Starburst Galaxies Observed with HUT 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 Observing Near the Galactic Lyman Limit: Revisions to the Ionizing Flux from Starburst Galaxies Observed with HUT, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observing Near the Galactic Lyman Limit: Revisions to the Ionizing Flux from Starburst Galaxies Observed with HUT will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-817498