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Spectral Libraries for Analyzing Spectra of Low-Metalicity Galaxies
Ivan Hubeny, Sara R. Heap
We present a set of isochrone-tailored spectral libraries for analyzing composite spectra of low-metallicity massive star clusters or starburst galaxies. Specifically, we have comp…
Properties of Primitive Galaxies
Sara R. Heap, I. Hubeny, J. -C. Bouret +2
We report on a study of 9 nearby star-forming, very low-metallicity galaxies observed by Hubble's COS far-UV spectrograph that can serve as templates of high-z galaxies to be obser…
The validity of 21 cm spin temperature as a kinetic temperature indicator in atomic and molecular gas
Gargi Shaw, G. J. Ferland, I. Hubeny
The gas kinetic temperature () of various interstellar environments is often inferred from observations that can deduce level populations of atoms, ions, or molecules using sp…
Modelling ultraviolet-line diagnostics of stars, the ionized and the neutral interstellar medium in star-forming galaxies
A. Vidal-García, S. Charlot, G. Bruzual +1
We combine state-of-the-art models for the production of stellar radiation and its transfer through the interstellar medium (ISM) to investigate ultraviolet-line diagnostics of sta…
Population III Stars in I Zw 18
Sally Heap, Jean-Claude Bouret, Ivan Hubeny
Ultraviolet and 21-cm observations suggest that the extremely low-metallicity galaxy, I Zw 18, is a stream-fed galaxy containing a "pocket" of pristine stars responsible for produc…