A Caltech Library Service

Masses and Orbital Inclinations of Planets in the PSR B1257+12 System

Konacki, Maciej and Wolszczan, Alex (2003) Masses and Orbital Inclinations of Planets in the PSR B1257+12 System. Astrophysical Journal, 591 (2). L147-L150. ISSN 0004-637X. doi:10.1086/377093.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Submitted Version
See Usage Policy.


Use this Persistent URL to link to this item:


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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Additional Information:© 2003. The American Astronomical Society. Received 2003 April 3; accepted 2003 May 23; published 2003 June 12. M. K. is a Michelson Postdoctoral Fellow and is partially supported by the Polish Committee for Scientific Research, grant 2P03D 001 22. A. W. is supported by NASA grant NAG5-4301 and by the NSF under grant AST 99-88217. The authors thank the referee, Renu Malhotra, for insightful comments on the manuscript.
Funding AgencyGrant Number
Michaelson Postdoctoral FellowshipUNSPECIFIED
Polish Committee for Scientific Research2P03D 001 22
NSFAST 99-88217
Subject Keywords:planetary systems; pulsars: individual (PSR B1257+12)
Issue or Number:2
Record Number:CaltechAUTHORS:20170408-135641153
Persistent URL:
Official Citation:Maciej Konacki and Alex Wolszczan 2003 ApJ 591 L147
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75891
Deposited By: 1Science Import
Deposited On:14 Apr 2017 16:38
Last Modified:15 Nov 2021 16:55

Repository Staff Only: item control page