literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Orbital Variability in the Eclipsing Pulsar Binary PSR B1957+20

Dec, 1993
9 pages
Published in:
  • Astrophys.J.Lett. 426 (1994) L85
e-Print:
DOI:
View in:
pdf
reference search89 citations

Citations per year

1994200220102018202401234567
Abstract: (arXiv)
We have conducted timing observations of the eclipsing millisecond binary pulsar PSR~B1957+20, extending the span of data on this pulsar to more than five years. During this time the orbital period of the system has varied by roughly ΔPb/Pb=1.6×10−7\Delta P_b/P_b = 1.6 \times 10^{-7}, changing quadratically with time and displaying an orbital period second derivative P¨b=(1.43±0.08)×10−18 \ddot P_b = (1.43 \pm 0.08) \times 10^{-18}\,s−1^{-1}. The previous measurement of a large negative orbital period derivative reflected only the short-term behavior of the system during the early observations: the orbital period derivative is now positive and increasing rapidly. If, as we suspect, the PSR~B1957+20 system is undergoing quasi-cyclic orbital period variations similar to those found in other close binaries such as Algol and RS CVn, then the 0.025 M⊙0.025\,M{_\odot} companion to PSR~B1957+20 is most likely non-degenerate, convective, and magnetically active.
  • 1992
    • T.L. Aldcroft
      ,
    • R.W. Romani
      ,
    • Cordes J. M.
      • Astrophys.J. 400 (1992) 638
  • 1982
    • M.A. Alpar
      ,
    • A.F. Cheng
      ,
    • M.A. Ruderman
      ,
    • Shaham J.
      • Nature 300 (1982) 728
  • 1992
    • Applegate J. H.
      • Astrophys.J. 385 (1992) 621
  • 1993
    • D.C. Backer
      ,
    • S. Hama
      ,
    • S. Van Hook
      ,
    • Foster R. S.
      • Astrophys.J. 404 (1993) 636
  • 1992
    • M. Banit
      ,
    • Shaham J.
      • Astrophys.J. 388 (1992) L19
  • den Heuvel, E. P. J. & van 1991
    • D. Bhattacharya
      • Phys.Rept. 203 (1991) 1
  • 1993
    • L. Brookshaw
      ,
    • Tavani M.
      • Astrophys.J. 410 (1993) 719
  • 1992
    • Eichler D.
      • Mon.Not.Roy.Astron.Soc. 254 (1992) 11
  • Klein
    • A.S. Fruchter
      ,
    • G. Berman
      ,
    • G. Bower
      ,
    • M. Convery
      ,
    • W.M. Goss
    et al.
    • J. R &
      • D.J. Nice
        ,
      • M.F. Ryba
        ,
      • D.R. Stinebring
        ,
      • J.H. Taylor
        ,
      • S.E. Thorsett
      • 1990
        • Weisberg J. M.
          • Astrophys.J. 351 (1990) 642
      • 1992
        • A.S. Fruchter
          ,
        • Goss W. M.
          • Astrophys.J. 384 (1992) L47
      • 1988
        • A.S. Fruchter
          ,
        • D.R. Stinebring
          ,
        • Taylor J. H.
          • Nature 333 (1988) 237
      • 1989
        • Hall D. S.
          • Space Sci.Rev. 50 (1989) 219
      • 1994, ApJ, in press
        • V.M. Kaspi
          ,
        • J.H. Taylor
          ,
        • Ryba M.
        • 1993
          • A.G. Lyne
            ,
          • J.D. Biggs
            ,
          • P.A. Harrison
            ,
          • Bailes M.
            • Nature 361 (1993) 47
          • A.G. Lyne
            ,
          • R.N. Manchester
            ,
          • N. D'Amico
            ,
          • L. Staveley-Smith
            ,
          • S. Johnston
          et al.
          • 1990
            • A.S. Fruchter
              ,
            • W.M. Goss
              ,
            • Frail D.
              • Nature 347 (1990) 650
          • 1994, ApJ, submitted
            • P.J. McCormick
              ,
            • J. Frank
              ,
            • A.R. King
              ,
            • Rajasekhar A.
            • 1992
              • D.J. Nice
                ,
              • Thorsett S. E.
                • Astrophys.J. 397 (1992) 249
            • 1990
              • D.J. Nice
                ,
              • S.E. Thorsett
                ,
              • J.H. Taylor
                ,
              • Fruchter A. S.
                • Astrophys.J. 361 (1990) L61
            • 1993, A&A, submitted
              • L. Pasquini
                ,
              • Lindgren H.
              • 1991
                • Podsiadlowski P.
                  • Nature 350 (1991) 136
              • 1989
                • M. Ruderman
                  ,
                • J. Shaham
                  ,
                • Tavani M.
                  • Astrophys.J. 336 (1989) 507
              • 1-25 of 36
              • 1
              • 2
              • 25 / page