Arecibo timing and single‐pulse observations of 17 pulsars

We report on timing and single-pulse observations of 17 pulsars discovered at the Arecibo Observatory. The highlights of our sample are the recycled pulsars J1829+2456, J1944+0907 and the drifting subpulses observed in PSR J0815+0939. For the double neutron star binary J1829+2456, in addition to improving upon our existing measurement of relativistic periastron advance, we have now measured the pulsar’s spin-period derivative. This new result sets an upper limit on the transverse speed of 120 km s −1 and a lower limit on the characteristic age of 12.4 Gyr. From our measurement of proper motion of the isolated 5.2-ms pulsar J1944+0907, we infer a transverse speed of 188 ± 65 km s −1 . This is higher than that of any other isolated millisecond pulsar. An estimate of the speed, using interstellar scintillation, of 235 ± 45 km s −1 indicates that the scattering medium along the line of sight is non-uniform. We discuss the drifting subpulses detected from three pulsars in the sample, in particular the remarkable drifting subpulse properties of the 645-ms pulsar J0815+0939. Drifting is observed in all four components of the pulse profile, with the sense of drift varying among the different components. This unusual ‘bi-drifting’ behaviour challenges standard explanations of the drifting subpulse phenomenon.

[1]  B. Stappers,et al.  The subpulse modulation properties of pulsars at 21 cm , 2005, astro-ph/0507282.

[2]  I. Stairs,et al.  Binary radio pulsars , 2005 .

[3]  D. Lorimer,et al.  A statistical study of 233 pulsar proper motions , 2005, astro-ph/0504584.

[4]  A. Fruchter,et al.  Discovery of 10 pulsars in an Arecibo drift‐scan survey , 2005, astro-ph/0504019.

[5]  K. Lee,et al.  A Model for the Challenging “Bi-drifting” Phenomenon in PSR J0815+09 , 2004, astro-ph/0410479.

[6]  A. Lyne,et al.  Long-term timing observations of 374 pulsars , 2004 .

[7]  M. Mclaughlin,et al.  The Parkes Multibeam Pulsar Survey - V. Finding binary and millisecond pulsars , 2004, astro-ph/0408228.

[8]  B. C. Joshi,et al.  The Parkes multibeam pulsar survey – IV. Discovery of 180 pulsars and parameters for 281 previously known pulsars , 2004, astro-ph/0405364.

[9]  O. Wucknitz,et al.  The Hubble constant from the gravitational lens CLASS B0218+357 using the Advanced Camera for Surveys , 2004 .

[10]  Y. Gupta,et al.  Unraveling the drift behaviour of the remarkable pulsar PSR B0826–34 , 2004, astro-ph/0404216.

[11]  A. Fruchter,et al.  New Binary and Millisecond Pulsars from Arecibo Drift-Scan Searches , 2004, astro-ph/0404181.

[12]  J. Cordes,et al.  PSR J1829+2456: a relativistic binary pulsar , 2004, astro-ph/0403553.

[13]  M. Mclaughlin,et al.  A Double-Pulsar System: A Rare Laboratory for Relativistic Gravity and Plasma Physics , 2004, Science.

[14]  A. Fruchter,et al.  PSR J0609+2130: a disrupted binary pulsar? , 2003, astro-ph/0308299.

[15]  F. Camilo,et al.  Young Neutron Stars and Their Environments , 2004 .

[16]  B. Stappers,et al.  Pulse-to-pulse intensity modulation and drifting subpulses in recycled pulsars , 2003, astro-ph/0305266.

[17]  J. Cordes,et al.  PSR J1740+1000: A Young Pulsar Well Out of the Galactic Plane , 2001, astro-ph/0106371.

[18]  J. Cordes,et al.  A New Model for the Galactic Distribution of Free Electrons and its Fluctuations , 2002, astro-ph/0207156.

[19]  D. Lorimer,et al.  Arecibo Timing Observations of 17 Pulsars along the Galactic Plane , 2001, astro-ph/0112106.

[20]  F. Camilo,et al.  The Parkes multi-beam pulsar survey - I. Observing and data analysis systems, discovery and timing of 100 pulsars , 2001, astro-ph/0106522.

[21]  R. Edwards,et al.  Discovery of Two Relativistic Neutron Star-White Dwarf Binaries , 2000, astro-ph/0010599.

[22]  Z. Arzoumanian,et al.  New Pulsars from an Arecibo Drift Scan Search , 2000, astro-ph/0008054.

[23]  D. Nice,et al.  Timing Observations of Four Millisecond Pulsars with the Arecibo and Effelsberg Radio Telescopes , 2000 .

[24]  M. Kramer,et al.  Pulsar Astronomy - 2000 and Beyond , 2000 .

[25]  A. Deshpande,et al.  Pulsar Magnetospheric Emission Mapping: Images and Implications of Polar Cap Weather , 1999, astro-ph/9909398.

[26]  D. Nice.  Radio Pulses along the Galactic Plane , 1998, astro-ph/9809095.

[27]  S. Anderson,et al.  Millisecond pulsar velocities , 1998, astro-ph/9811398.

[28]  J. Cordes,et al.  Diffractive Interstellar Scintillation Timescales and Velocities , 1998 .

[29]  D. Chakrabarty,et al.  Neutron Star Mass Measurements. I. Radio Pulsars , 1998, astro-ph/9803260.

[30]  T. Prince,et al.  A Survey for Millisecond Pulsars , 1996 .

[31]  J. A. Shrauner,et al.  Princeton-Arecibo Declination-Strip Survey for Millisecond Pulsars. I. , 1996 .

[32]  D. Nice,et al.  A Search for Millisecond Pulsars at Galactic Latitudes -50 degrees < B < -20 degrees , 1996 .

[33]  J. Cordes,et al.  Discovery of Three Radio Pulsars from an X-Ray--selected Sample , 1996 .

[34]  A. Fruchter,et al.  A Search for Fast Pulsars along the Galactic Plane , 1995 .

[35]  G. Vasisht,et al.  Much Ado About Nothing: Several Large-Area Surveys for Radio Pulsars From Arecibo , 1995 .

[36]  D. Nice,et al.  PSR J2019+2425 and PSR J2322+2057 and the proper motions of millisecond pulsars , 1995 .

[37]  S. Kulkarni,et al.  The magnetic fields, ages, and original spin periods of millisecond pulsars , 1994 .

[38]  D. Nice,et al.  Discovery of two fast-rotating pulsars , 1993 .

[39]  D. Frail,et al.  A planetary system around the millisecond pulsar PSR1257 + 12 , 1992, Nature.

[40]  M. Tavani,et al.  Accretion turnoff and rapid evaporation of very light secondaries in low-mass X-ray binaries , 1989 .

[41]  T. Hankins,et al.  The Drifting Subpulse Phenomenon Observed in Three Pulsars with Triple Profiles , 1987 .

[42]  G. H. Stokes,et al.  Results of two surveys for fast pulsars , 1986 .

[43]  J. Weisberg,et al.  Observations of post-Newtonian timing effects in the binary pulsar PSR 1913+16 , 1984 .

[44]  J. Rankin.  Toward an empirical theory of pulsar emission. I: Morphological taxonomy , 1983 .

[45]  J. H. Taylor,et al.  A new test of general relativity - Gravitational radiation and the binary pulsar PSR 1913+16 , 1982 .

[46]  R. Hulse,et al.  A deep sample of new pulsars and their spatial extent in the Galaxy. , 1975 .

[47]  J. Taylor.  DISCOVERY OF A PULSAR IN A BINARY SYSTEM , 1975 .

[48]  Ruderman,et al.  Theory of pulsars: polar gaps, sparks, and coherent microwave radiation , 1975 .

[49]  J. Taylor,et al.  A high-sensitivity pulsar survey , 1974 .

[50]  D. Backer,et al.  Pulsar fluctuation spectra and the generalized drifting-subpulse phenomenon. II , 1973 .

[51]  F. D. Drake,et al.  Second Periodic Pulsation in Pulsars , 1968, Nature.