Allegheny Observatory search for planetary systems

Details Allegheny Observatory search for planetary systems Allegheny Observatory search for planetary systems

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991plas.rept...45g&link_type=abstract

In NASA, Washington, Reports of Planetary Astronomy, 1991 p 45-46 (SEE N92-12792 03-89)

Astronomy and Astrophysics

Astronomy

Astrometry, Observatories, Photometers, Planetary Systems, Refracting Telescopes, Ice, Planets, Precision, Radial Velocity, Sensitivity, Water

Scientific paper

The newly developed Multichannel Astrometric Photometer (MAP) and a rebuilt red light 0.76 meter Thaw refractor are used in an astrometric observational program to detect Jupiter-like planets in orbit about nearby stars. The program includes 15 stars and is obtaining approx. 12 good observations per year of each of them, sufficient to assure an annual normal point precision of 0.001 arcsec (1 mas) per object. The observational program will yield the first astrometric information about planetary systems in general. The astrometric technique is most sensitive to nearby planetary systems and to massive planets that have orbits that place them within the regions around a star where the temperature is sufficiently low to permit the existence of water ice grains. Thus it covers a different search space than that of radial velocity techniques. Currently the only astrometric survey program, it is complementary to other detection programs and some target stars have been included to assure overlap with them. The minimum detectable mass varies with the particular target star from objects almost twice as massive as Neptune to bodies almost twice as massive as Jupiter.

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