Computer Science
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ingn....3....7m&link_type=abstract
The Newsletter of the Isaac Newton Group of Telescopes (ING Newsl.), issue no. 3, p. 7-8
Computer Science
Int, Type Ia Supernovae, Supernova Progenitors, Subdwarf-B Stars, Sdb Stars.
Scientific paper
The properties of binary subdwarf-B (sdB) stars strongly suggest they are composed almost entirely of helium and have masses close to 0.5 solar masses (Saffer et al., 1998). We suspected that many of these stars would be short period binary stars, and we were right. We found 22 binary stars from a sample of 42 sdB stars from the Doppler shifts in the H-alpha line, only one or two of which were previously known. However, despite this important result, this observing run will be remembered for the two hours we spent observing one particular sdB star, KPD1930+2752, because it turned out that this star could be an important step in answering some of the biggest questions in observational cosmology.
Marsh Thomas R.
Maxted Pierre F. L.
North R. C.
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