Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...196.2914h&link_type=abstract
American Astronomical Society, 196th AAS Meeting, #29.14; Bulletin of the American Astronomical Society, Vol. 32, p.718
Astronomy and Astrophysics
Astronomy
Scientific paper
We perform a detailed analysis of the restframe far-UV spectrum of cB58 that was obtained by Pettini et al. (ApJ 528,96, 2000) using the KECK-I/LRIS. In the previous paper (AAS 195, 9.19), we modeled the spectrum of the galaxy and found that the observed spectrum is well described by a starburst model having a SMC-like metallicity and a constant star formation rate. Here, we extend the analysis to model the total spectrum that includes stellar as well as interstellar contributions. The latter is modeled using a newly developed program CLOUDSPEC that combines the photoionization program CLOUDY (Ferland, http://www.pa.uky.edu/ gary/cloudy) with our spectrum synthesis program SYNSPEC (Hubeny & Lanz, http://tlusty.gsfc.nasa.gov). With the ionization structure of the interstellar medium given by CLOUDY, CLOUDSPEC solves the radiative transfer along the line-of-sight to the starburst and yields the profiles of the interstellar absorption lines. We show that such a ``unified'' model of the stellar + interstellar spectrum provides an excellent match to the observed spectrum of cB58.
Heap Sally R.
Hubeny Ivan
Lanz Thierry M.
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