SIMBAD references

2003ApJ...591L.147K - Astrophys. J., 591, L147-L150 (2003/July-2)

Masses and orbital inclinations of planets in the PSR B1257+12 system.


Abstract (from CDS):

We present measurements of the true masses and orbital inclinations of the two Earth-mass planets in the PSR B1257+12 system, based on the analysis of their mutual gravitational perturbations detectable as microsecond variations of the arrival times of radio pulses from the pulsar. The 6.2 ms pulsar, PSR B1257+12, has been regularly timed with the Arecibo telescope since late 1990. Assuming the standard pulsar mass of 1.4 M, the derived masses of planets B and C are 4.3±0.2 and 3.9±0.2 M, respectively. The corresponding orbital inclinations of 53°±4° and 47°±3° (or 127° and 133°) imply that the two orbits are almost coplanar. This result, together with the known near 3:2 resonance between the orbits of the two planets, strongly supports the hypothesis of a disk origin of the PSR B1257+12 planetary system. The system's long-term stability is guaranteed by the low Earth-like masses of planets B and C.

Abstract Copyright:

Journal keyword(s): Stars: Planetary Systems - Stars: Pulsars: Individual: Alphanumeric: PSR B1257+12

Simbad objects: 4

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