ar X iv : a st ro - p h / 96 05 14 1 v 1 2 3 M ay 1 99 6 Orbital Parameters of the PSR B 1620 − 26 Triple System
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چکیده
Previous timing data for PSR B1620−26 were consistent with a second companion mass m 2 anywhere in the range ∼ 10 −3 − 1 M ⊙ , i.e., from a Jupiter-type planet to a star. We present the latest timing parameters for the system, including a significant change in the projected semi-major axis of the inner binary, a marginal detection of the fourth time derivative of the pulse frequency, and the pulsar proper motion (which is in agreement with published values for the proper motion of M4), and use them to further constrain the mass m 2 and the orbital parameters. Using the observed value of ....
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ar X iv : a st ro - p h / 99 05 37 6 v 1 2 8 M ay 1 99 9 A 6 . 4 - hr positive superhump period in TV
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