The MUCHFUSS Project-Searching for Massive Compact Companions to Hot Subdwarf Stars

Details The MUCHFUSS Project-Searching for Massive Compact Companions to Hot Subdwarf Stars The MUCHFUSS Project-Searching for Massive Compact Companions to Hot Subdwarf Stars

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1314...67g&link_type=abstract

INTERNATIONAL CONFERENCE ON BINARIES: In celebration of Ron Webbink's 65th Birthday. AIP Conference Proceedings, Volume 1314, p

Computer Science

Dwarf Stars, Stellar Mass, Neutron Stars, Galaxy, Giant And Subgiant Stars, Masses, Neutron Stars, Small And Compact Galaxy Groups

Scientific paper

The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims at finding hot subdwarf stars with massive compact companions like supermassive white dwarfs (M>1.0Msolar), neutron stars or stellar mass black holes. The existence of such systems is predicted by binary evolution theory and recent discoveries indicate that they exist in our Galaxy. We classified about 1500 hot subdwarf stars from the Sloan Digital Sky Survey (SDSS) by colour selection and visual inspection of their spectra. Stars with high velocities have been reobserved and individual SDSS spectra have been analysed. In total about 170 radial velocity variable subdwarfs have been discovered and about 80 of them have been selected as good candidates for follow-up time resolved spectroscopy to derive their orbital parameters. Up to now we found seven close binary sdBs with short orbital periods ranging from ~=0.21 d to 1.5 d. In our photometric follow-up campaign we discovered two eclipsing binaries with most likely substellar companions.

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