Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995azh....72..400t&link_type=abstract
Astronomicheskij Zhurnal, vol. 72, p. 400
Astronomy and Astrophysics
Astronomy
6
Planetary Systems, Main Sequence Stars, Angular Momentum, Eclipsing Binary Stars, Stellar Orbits, Planetary Evolution, Cosmic Dust, Gas Giant Planets, Brown Dwarf Stars, Variable Stars
Scientific paper
The observed distribution of binaries with respect to the orbital angular momentum is used to estimate the relative frequency of planetary system formation. It appears to be close to one third of the star formation frequency. This estimate is supported by the observed frequency of cold dust disks around main sequence A, F, G, K stars. Giant planets originating at the evaporation border of volatile components of circumstellar dust can occult about one percent of their low mass (0.1 solar mass) central stars. Systematic photometric tracking of stars up to I = 20 m within one square degree at a galactic latitude of 50 deg may lead to the discovery of about 10 eclipsing planetary systems with orbital periods from one to three months, duration of eclipse from 2.5 to 6.5 hr, and an occultation depth up to 1 m. This approach is also efficient in the search for brown dwarf companions of low mass stars. Separation of planetary systems from eclipsing binaries is discussed in detail. Short orbital periods of giant Jupiter-type planets, and relatively deep occultations increase the possibility of their discovery in the frame of current or planned variable star search projects.
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