Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ap%26ss.329..261s&link_type=abstract
Astrophysics and Space Science, Volume 329, Issue 1-2, pp. 261-266
Astronomy and Astrophysics
Astronomy
2
Ultraviolet Astronomy, Stars: Subdwarfs, Space Missions
Scientific paper
The hot subdwarf B (sdB) stars are considered to be core He-burning stars with surface temperatures T eff up to 40 000 K and log g≥5. They are UV bright and ultraviolet observatories have a significant impact on studies of these objects. Using the technical characteristics of the instruments of the World Space Observatory-Ultraviolet ( WSO-UV) mission and data from previous UV studies of sdBs we estimate the limiting apparent magnitudes for these stars that can be observed with the signal-to-noise ratio required in fine spectroscopic analysis. WSO-UV is an international space observatory for observation in UV spectral range 100-350 nm, that is beyond the reach of ground-based instruments but where most of astrophysical processes can be efficiently studied with unprecedented capability. The WSO-UV project is currently funded by national space agencies of Russia and Spain with participation of Germany, Ukraine and China. The WSO-UV consists of a 1.7 m aperture telescope (under responsibility of Russia) with instrumentation designed to carry out high resolution spectroscopy, long-slit low resolution spectroscopy and direct sky imaging. The WSO-UV Ground Segment is under development by Spain and Russia. They will coordinate the Mission and Science Operations and provide the satellite tracking stations for the project. The WSO-UV will work as a targeted scientific observatory. The scientific program of the observatory is open to excellent scientific projects from the world-wide community and occupies up to 40% of total observational time.
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