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7 papers · 1 filter
Radiative Habitable Zones in Martian Polar Environments
C. Cordoba-Jabonero, M. -P. Zorzano, F. Selsis +2
The biologically damaging solar ultraviolet (UV) radiation (quantified by the DNA-weighted dose) reaches the Martian surface in extremely high levels. Searching for potentially hab…
The mass of the neutron star in SMC X-1
A. K. F. Val Baker, A. J. Norton, H. Quaintrell
We present new optical spectroscopy of the eclipsing binary pulsar Sk 160/SMC X-1. From the He I absorption lines, taking heating corrections into account, we determine the radial…
Nucleosynthetic signatures of the first stars
Anna Frebel, Wako Aoki, Norbert Christlieb +16
The chemically most primitive stars provide constraints on the nature of the first stellar objects that formed in the Universe; elements other than hydrogen, helium and traces of l…
Further Wolf-Rayet stars in the starburst cluster Westerlund 1
Ignacio Negueruela, J. Simon Clark
We present new low and intermediate-resolution spectroscopic observations of the Wolf Rayet (WR) star population in the massive starburst cluster Westerlund 1. Finding charts are p…
On the Binarity of Carbon-Enhanced, Metal-Poor Stars
S. Tsangarides, S. G. Ryan, T. C. Beers
We report on a programme to monitor the radial velocities of a sample of candidate and confirmed carbon-enhanced, metal-poor (CEMP) stars. We observed 45 targets using the Echelle…
The Halo Lithium Plateau: Outstanding Issues
Sean G. Ryan, Lisa Elliott
We examine outstanding issues in the analysis and interpretation of the halo Li plateau. We show that the majority of very Li-poor halo Li-plateau stars (5 out of 8) have high proj…