Notes for PSR B1620-26
by Jean Schneiderupdate: 29 June 1999
The planet:
- Detection method: Timing
- Basic data: The fit of the timing curve gives several solutions
for the planet (Thorsett et al. 1999):
Parameter solution 1 solution 2 solution 3 Semi-major axis (AU): ~ 10 30 64 (60 (Ford et al. 1999)) Orbital period (yrs): 61.8 129 389 ( ~ 300 (Ford et al. 1999)) Eccentricity: 0. 0.2 0.5 (0.45 (Ford et al. 1999)) - Remarks: The pulsar is in a binary system (period = 191.4428 d.) with a white dwarf companion (Thorsett et al. 1999); this explains the uncertainties in the fitting of the planet parameters.
- References:
- ARZOUMIAN Z., JOSHI K., RASIO F. & THORSETT S., 1996
Orbital Parameters of the PSR B1620-26 Triple System.
in Pulsars: Problems and Progress,
eds. M. Bailes, S. Johnston, & M. Walker
(IAU Colloquium 160, Astronomical Soc. of the Pacific, Conf. Series), p.525.
paper - BACKER D. C., FOSTER R. S. & SALLMEN S., 1993
A second companion of the millisecond pulsar 1620-26
Nature, 365, 817 - FORD E., JOSHI K., RASIO F. & ZBARSKI B., 1999
Theoretical Implications of the PSR B1620-26 Triple System and its Planet
ApJ., 528, 336
paper preprint - JOSHI K. & RASIO F., 1997
Distant Companions and Planets around Millisecond Pulsars
ApJ., 479, 948
paper
(ApJ., 488, 901: erratum) - RASIO F., 1998
New Evidence for a Planet or Brown Dwarf in Orbit Around PSR B1620-26.
in Proc. of Texas Symposium on Relativistic Astrophysics, eds. A. Olinto et al. (Ann. N.Y. Acad. Sci.), in press. - RASIO F. A., 1994
Is there a planet in the PSR 1620-26 triple system?
ApJ. Letters, 427, 107L
abstract and paper. - SCHEARER A., BUTLER R., REDFERN R., CULLUM M.; & DANKS A., 1996
A Search for the Optical Counterpart of the Triple Pulsar System PSR B1620-26 in M4.
ApJ.L., 473, L115
paper - SIGURDSSON S., 1995
Assessing the Environmental Impact on PSR~B1620-26 in M4.
ApJ., 452, 323 abstract - THORSETT S., ARZOUMANIAN Z., CAMILO F. & LYNE A., 1999
The Triple Pulsar System PSR B1620-26 in M4
ApJ. 523, 763
paper
- ARZOUMIAN Z., JOSHI K., RASIO F. & THORSETT S., 1996
The star:
- Distance: 3.8 kpc
This distance is deduced from a DM of 63 pc.cm-3, using the on-line model of Taylor and Cordes (ApJ., 411, 674, 1993). - Coordinates (2000): RAB = 16:20:34.17510, DECB = -26:-24:-58.56000
- More data:
- Basic Data (from the Princeton Pulsar Group; enter `1620-26' in the `pulsar catalog information' field).
- Most recent refs. (from ADS; enter `PSR 1620-26' in the `objects' field)
Back to the Extra-solar Planets Catalog
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