Earth-size Planets in the PSR B1257+12 Planetary System

Details Earth-size Planets in the PSR B1257+12 Planetary System Earth-size Planets in the PSR B1257+12 Planetary System

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.5503k&link_type=abstract

American Astronomical Society Meeting 202, #55.03; Bulletin of the American Astronomical Society, Vol. 35, p.774

Astronomy and Astrophysics

Astronomy

Scientific paper

The field of extrasolar planets has emerged in 1992 with the detection of three terrestrial-mass planets orbiting the millisecond pulsar PSR B1257+12 by Wolszczan & Frail . The pulsar has been observed with the 305 m Arecibo radiotelescope since its discovery in 1990. The pulse arrival time measurements of the pulsar B1257+12 collected over the years 1990-2003 with the Mark-III and the Penn State Pulsar Machine-1 backends supplemented with the new semi-analytical theory of the dynamics of the PSR B1257+12 planetary system allow us now to determine the masses of the planets B and C. The derived masses are respectively 4.3+/-0.2 and 3.9+/-0.2 Earth masses, making it the first determination of the extrasolar planet masses in the Earth-size regime.

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