Thesis Open Access

Two High-Sensitivity Pulsar Searches

Nice, David J

Thesis supervisor(s)

Taylor, Joseph H

We have undertaken a program of two searches at radio wavelengths for pulsars using the Arecibo Observatory. One search covered 70 square degrees of sky along the Galactic plane with sensitivity to pulsars with periods as short as 1 ms. The second search covered 170 square degrees between Galactic latitudes -50° and -30° with sensitivity to pulsars with periods of 0.5 ms or more. The sensitivity to long-period pulsars in both surveys was of order 1 mJy, with reduced sensitivity at the shortest periods.

Twenty-five pulsars were detected between the two surveys. Ten of these had previously been discovered. Of the remaining fifteen new pulsars, thirteen are relatively young, slow pulsars, with periods between 0.212 s and 5.094 s. The latter period is the longest of any known radio pulsar; this pulsar also has an extraordinarily short duty cycle of 0.4%.

Two millisecond pulsars were found. PSR J2019+2425 has a period of 3.934 ms and is at a distance of 1 kpc. It is in a 76.5-day binary orbit with a 0.3 M companion. Its orbital eccentricity is 1.1 x 10^-4.   The spin-down rate of this pulsar is extremely small, and its evolutionary timescale of 9 x 10^9 yr is the longest of any known pulsar. Both the low eccentricity and the long evolutionary timescale put limits on violations of the strong equivalence principle which are competitive with the best previous limits.

The second newly found millisecond pulsar, PSR J2322+2057, has a period of 4.808 ms and a distance of 0.8 kpc. It is the second isolated millisecond pulsar found outside of globular clusters. Its distance of nearly 0.5 kpc from the Galactic plane suggests that millisecond pulsars have a large scale height.

Files (2.9 MB)
Name Size
thesis_with_ocr.pdf
md5:2dc600fdbe4569caa82e43150ba46b0b
2.9 MB Download
  • Backer, D. C., Kulkarni, S. R., Heiles, C., Davis, M. M., and Goss, W. M. 1982, Nature, 300, 615.

  • Bahcall, J. H. 1984, Astrophys. J., 276, 169.

  • Bailes, M., Lyne, A. G., and Shemar, S. L. 1991, Nature, 352, 311.

  • Bhattacharya, D. and van den Heuvel, E. P. J. 1991, Phys. Rep., 203, 1.

  • Biggs, J. D. and Lyne, A. G. 1992, Mon. Not. R. astr. Soc., 254, 257.

  • Bionta, R. M. et al. 1987, Phys. Rev. Lett., 58, 1494.

  • Bracewell, R. 1965, The Fourier Transform and its Applications, New York: McGraw-Hill.

  • Callanan, P. J., Charles, P. A., Hassal, B. J. M., Machin, G., Mason, K. 0., Naylor, T., Smale, A. P., and van Paradijs, J. 1989, Mon. Not. R. astr. Soc., 238, 25P.

  • Clifton, T. R., Lyne, A. G., Jones, A. W., McKenna, J., and Ashworth, M. 19.92, Mon. Not. R. astr. Soc., 254, 177.

  • Cordes, J. M. and Taylor, J. T. 1992, In preparation.

  • Cordes, J. M., Weisberg, J. M., Frail, D. A., Spangler, S. R., and Ryan, M. 1992, Nature, 354, 121.

  • Counselman, C. C. and Shapiro, I. I. 1968, Science, 162, 352.

  • Damashek, M., Taylor, J. H., and Hulse, R. A. 1978, Astrophys. J., 225, 131.

  • D'Amico, N., Manchester, R. N., Durdin, J. M., Stokes, G. H., Stinebring, D. R., Taylor, J. H., and Brissenden, R. J. V. 1988, Mon. Not. R. astr. Soc., 234, 437.

  • Damour, T. and Esposito-Farese, G. 1992, Glass. Quant. Grav. Submitted. Damour, T., Gibbons, G. W., and Taylor, J. H. 1988, Phys. Rev. Lett., 61, 1151.

  • Damour, T. and Schafer, G. 1991, Phys. Rev. Lett., 66, 2549.

  • Damour, T. and Taylor, J. H. 1991, Astrophys. J., 366, 501.

  • Davies, J. G., Lyne, A. G., and Seiradakis, J. H. 1977, Mon. Not. R. astr. Soc., 179, 635.

  • Demianski, M. and Pr6szynski, M. 1979, Nature, 282, 383.

  • Dickel, H. R., Lortet, M.-C., and de Boer, K. S. 1987, Astr. Astrophys. Suppl. Ser., 68, 75.

  • Foster, R. S. 1990. Constructing a Pulsar Timing Array. PhD thesis, University of California, Berkeley.

  • Frail, D. A. and Kulkarni, S. R. 1991, Nature, 352, 785.

  • Fruchter, A. S. 1989. Pulsars Lost and Found: The Second Princeton-Arecibo Millisecond Pulsar Search. PhD thesis, Princeton University.

  • Fruchter, A. S., Stinebring, D. R., and Taylor, J. H. 1988, Nature, 333, 237. Goldman, I. 1990, Mon. Not. R. astr. Soc., 244, 184.

  • Hagen, J. 1985, NAIC Manual No. 8319.

  • Hankins, T. H. and Rajkowski, J. M. 1987, Rev. Sci. lnstrum., 58, 674.

  • Haslam, C. G. T., Salter, C. J., Stoffel, H., and Wilson, W. E. 1982, Astr. Astrophys. Suppl. Ser., 47, 1.

  • Helfand, D. J., Manchester, R.N., and Taylor, J. H. 1975, Astrophys. J., 198, 661.

  • Helfand, D. J., Taylor, J. H., Backus, P.R., and Cordes, J. M. 1980, Astrophys. J., 237, 206.

  • Hellings, R. W., Adams, P. J., Keesey, M. S., Lau, E. L., Standish, E. M., Canuto, V. M., and Goldman, I. 1983, Phys. Rev. Lett., 51, 1609.

  • Hirata, K. et al. 1987, Phys. Rev. Lett., 58, 1490.

  • Hulse, R. A. and Taylor, J. H. 1974, Astrophys. J. (Lett.), 191, 159.

  • Hulse, R. A. and Taylor, J. H. 1975, Astrophys. J. (Lett.), 201, 155.

  • International Astronomical Union 1976, Trans. IAU, 16B, 58.

  • Johnston, S. 1990. A High Frequency Survey of the Southern Galactic Plane for Pulsars. PhD thesis, The University of Manchester.

  • Kulkarni, S. R. 1986, Astrophys. J. (Lett.), 306, 185.

  • Kulkarni, S. R., Anderson, S. B., Prince, T. A., and Wolszczan, A. 1991, Nature, 349, 47.

  • Kulkarni, S. R., Djorgovski, S., and Klemola, A. R. 1991, Astrophys. J., 367, 221.

  • Kulkarni, S. R. and Hester, J. J. 1988, Nature, 335, 801.

  • Large, M. I. and Vaughan, A. E. 1971, Mon. Not. R. astr. Soc., 151, 277.

  • Lyne, A. G., Anderson, B., and Salter, M. J. 1982, Mon. Not. R. astr. Soc., 201, 503.

  • Lyne, A. G. and Bailes, M. 1992, Nature, 355, 213.

  • Lyne, A. G. et al. 1990, Nature, 347, 650.

  • Manchester, R. N., Lyne, A. G., Robinson, C., D'Amico, N. D., Bailes, M., and Lim, J. 1991, Nature, 352, 219.

  • Manchester, R. N., Lyne, A. G., Taylor, J. H., Durdin, J. M., Large, M. I., and Little, A. G. 1978, Mon. Not. R. astr. Soc., 185, 409.

  • Manchester, R.N. and Taylor, J. H. 1977, Pulsars, San Francisco: Freeman. National Astronomy and Ionosphere Center 1989, Arecibo Observatory User's Manual.

  • Nordtvedt, K. 1968a, Phys. Rev., 169, 1014. ---.1968b, Phys. Rev., 170, 1186. --.1990, Phys. Rev. Lett., 65, 953.

  • Press, W. H., Flannery, B. P., Teukolsky, S. A., and Vetterling, W. T. 1986, Numerical Recipes: The Art of Scientific Computing, Cambridge: Cam- bridge University Press.

  • Rankin, J. M. 1990, Astrophys. J., 352, 247.

  • Rawley, L. A. 1986. Timing Millisecond Pulsars. PhD thesis, Princeton University.

  • Reasenberg, R. D. 1983, Philos. Trans. Roy. Soc. London A, 310, 227.

  • Romani, R. W. 1989, in Timing Neutron Stars, ed. H. Ogelman and E. P. J. van den Heuvel, Dordrecht, Holland: Kluwer, 113.

  • Ruderman, M., Shaham, J., and Tavani, M. 1989, Astrophys. J., 336, 507.

  • Ryba, M. F. 1991. High Precision Timing of Millisecond Pulsars. PhD thesis, Princeton University.

  • Ryba, M. F. and Taylor, J. H. 1991, Astrophys. J., 371, 739.

  • Segelstein, D. J., Rawley, L.A., Stinebring, D. R., Fruchter, A. S., and Taylor, J. H. 1986, Nature, 322, 714.

  • Shapiro, I. I. 1964, Phys. Rev. Lett., 13, 789.

  • Shapiro, I. I., Counselman, C. C., and King, R. W. 1976, Phys. Rev. Lett., 36, 555.

  • Staelin, D. H. and Reifenstein, E. C. 1968, Science, 162, 1481.

  • Standish, E. M. 1982, Astr. Astrophys., 114, 297.

  • Stinebring, D. R., Kaspi, V. M., Nice, D. J., Ryba, M. F., Taylor, J. H., Thorsett, S. E., and Hankins, T. H. 1992, Rev. Sci. lnstrum. In press.

  • Stinebring, D. R., Ryba, M. F., Taylor, J. H., and Romani, R. W. 1990, Phys. Rev. Lett., 65, 285.

  • Stokes, G. H., Segelstein, D. J., Taylor, J. H., and Dewey, R. J. 1986, Astro- phys. J., 311, 694.

  • Taylor, J. D., Wolszczan, A., Damour, T., and Weisberg, J. M. 1992, Nature, 355, 132.

  • Taylor, J. H. 1974, Astr. Astrophys. Suppl. Ser., 15, 367.

  • Taylor, J. H. and Weisberg, J. M. 1989, Astrophys. J., 345, 434.

  • Thorsett, S. E. 1991. Observing Millisecond and Binary Pulsars. PhD thesis, Princeton University.

  • Will, C. M. 1981, Theory and Experiment in Gravitational Physics, Cambridge: Cambridge University Press.

  • Williams, J. G. et al. 1976, Phys. Rev. Lett., 36, 551. Wolszczan, A. 1991, Nature, 350, 688.

  • Wolszczan, A. and Frail, D. A. 1992, Nature, 355, 145. Wright, G. A. and Loh, E. D. 1986, Nature, 324, 127.

239
260
views
downloads
All versions This version
Views 239239
Downloads 260260
Data volume 757.8 MB757.8 MB
Unique views 237237
Unique downloads 256256

Share

Cite as