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astro-ph.GA2013★ 22 cited
A spectroscopic binary in the Hercules dwarf spheroidal galaxy
Andreas Koch, Terese Hansen, Sofia Feltzing +1
We present the radial velocity curve of a single-lined spectroscopic binary in the faint Hercules dwarf spheroidal (dSph) galaxy, based on 34 individual spectra covering more than…
astro-ph.SR2013
Heavy Elements in the Early Galaxy
Terese Hansen, Johannes Andersen, Birgitta Nordtröm
The oldest stars in the universe retain to a great extent detailed information on the chemical composition of the interstellar medium at the time of their birth. Hence the earliest…