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Showing 2012 · astro-ph.GAShow all
3 papers · 2 filters
astro-ph.GA2012★ 82 cited
Interferometric Identification of a Pre-Brown Dwarf
Philippe André, Derek Ward-Thompson, Jane Greaves
It is not known whether brown dwarfs (stellar-like objects with masses less than the hydrogen-burning limit, 0.075 Msun) are formed in the same way as solar-type stars or by some o…
astro-ph.GA2012★ 33 cited
Modelling the black hole silhouette in Sgr A* with ion tori
Odele Straub, Frederic H. Vincent, Marek A. Abramowicz +2
We calculate the "observed at infinity" image and spectrum of the accretion structure in Sgr A*, by modelling it as an optically thin, constant angular momentum ion torus in hydrod…
astro-ph.GA2012★ 341 cited
An extremely primitive halo star
E. Caffau, P. Bonifacio, P. François +11
The early Universe had a chemical composition consisting of hydrogen, helium and traces of lithium1, almost all other elements were created in stars and supernovae. The mass fracti…