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  • 1
    Electronic Resource
    Electronic Resource
    Astronomy Life beyond the pulsar death valley (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 400 (1999), S. 812-813 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Rapidly spinning, strongly magnetized neutron stars, which reveal themselves to astronomers as radio pulsars, have been known for more than 30 years. Yet despite a steady progress in our understanding of the physics of these fascinating objects, to paraphrase a quote from a 1976 conversation ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/23576
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  • 2
    Electronic Resource
    Electronic Resource
    A nearby 37.9-ms radio pulsar in a relativistic binary system (1991)
    [s.l.] : Nature Publishing Group
    Nature 350 (1991), S. 688-690 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Arecibo survey was carried out in February 1990 during an extensive maintenance period, when the restrictions on the telescope motion limited its usage to transit observations. The ranges of Galactic longitudes 0°^/^35° and 210°^/^ 360° were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/350688a0
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  • 3
    Electronic Resource
    Electronic Resource
    Timing and scintillation observations of the fast pulsar in CTB80 (1988)
    [s.l.] : Nature Publishing Group
    Nature 331 (1988), S. 53-54 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Timing measurements of PSR1951 + 32, the pulsar in CTB 80, were made with the Arecibo 305-m telescope on the nights of 17, 20, 22 and 26-28 July at observing frequencies near 1,408 MHz. Signals of both circular polarizations were amplified by cooled GaAs FET preamplifiers, converted to an ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/331053a0
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  • 4
    Electronic Resource
    Electronic Resource
    Old pulsars in the low-density globular clusters MI3 and M53 (1991)
    [s.l.] : Nature Publishing Group
    Nature 349 (1991), S. 47-49 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We discovered the pulsars during a survey of globular clusters with the Arecibo 305-m radio telescope6'7. The observations were conducted at a centre frequency of 430 MHz and bandwidth of 10 MHz using the observatory's digital correlator in a manner identical to that described in ref. 8. The data ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/349047a0
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  • 5
    Electronic Resource
    Electronic Resource
    Discovery of two radio pulsars in the globular cluster M15 (1990)
    [s.l.] : Nature Publishing Group
    Nature 346 (1990), S. 42-44 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The initial observations were made using the 305-m Arecibo radio telescope at a central frequency of 430 MHz and a 10-MHz receiver bandwidth. The data were sampled at an effective rate of 1.974kHz using the Arecibo 40-MHz three-level correlation spectrometer in a manner identical to that used in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/346042a0
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  • 6
    Electronic Resource
    Electronic Resource
    A planetary system around the millisecond pulsar PSR1257 + 12 (1992)
    [s.l.] : Nature Publishing Group
    Nature 355 (1992), S. 145-147 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The 6.2-ms pulsar PSR1257 + 12 (Fig. 1) was discovered during the search at high galactic latitudes for millisecond pulsars conducted in February 1990 with the 305-m Arecibo radiotelescope at a frequency of 430 MHz (ref. 2). The characteristics of this survey and the details of data ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/355145a0
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  • 7
    Electronic Resource
    Electronic Resource
    A 110-ms pulsar, with negative period derivative, in the globular cluster M15 (1989)
    [s.l.] : Nature Publishing Group
    Nature 337 (1989), S. 531-533 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The discoveries of millisecond pulsars in globular clusters M28 (ref. 4) and M4 (ref. 5) led us to survey all clusters accessible to the 305-m Arecibo radio telescope (0°^〈 5^38°). A dual-polarization, 40-MHz-bandwidth signal at 1415 MHz was passed through the Arecibo ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/337531a0
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  • 8
    Electronic Resource
    Electronic Resource
    Toward planets around neutron stars (1994)
    Springer
    Astrophysics and space science 212 (1994), S. 67-75 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The two Earth-like mass objects orbiting a 6.2-ms pulsar, PSR1257+25, have survived more than one year of close scrutiny aimed at verifying their existence and remain the most serious candidates to become the first planets detected beyond the Solar System. The analysis of systematic timing measurements of the pulsar made over a 2.5-year period continues to require the presence of two planets with the minimum masses of 3.4M ⊕ and 2.8M ⊕ and the corresponding distances from PSR1257+12 of 0.36 AU and 0.47 AU to correctly predict the pulse arrival times. The presently available 3µs rms accuracy of this procedure leaves little room for significant contributions to the pulsar's timing from any mechanisms other than the Keplerian motion. A detection of the effect of planetary perturbations on pulse arrival times which is commonly accepted as the most convincing way to furnish a “100% proof” of the reality of pulsar planets is already possible at a ∼ 2σ level. Intensive searches for millisecond pulsars now under way at various observatories are expected to address a very intriguing question of the frequency of occurrence of neutron star planetary systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984511
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  • 9
    Electronic Resource
    Electronic Resource
    Searches for Planets Around Neutron Stars (1997)
    Springer
    Celestial mechanics and dynamical astronomy 68 (1997), S. 13-25 
    Details
    ISSN: 1572-9478
    Keywords: neutron stars ; pulsars ; extrasolar planets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We review the methodology of searches for planet-mass bodies around neutron stars observable as radio pulsars and discuss the current status of these searches. PSR B1257 + 12, a 6.2-millisecond pulsar, remains the only neutron star accompanied by confirmed planets. It is possible that there is a fourth distant planet in the 1257+12 system. The best of the other candidates for pulsar planets under consideration is a distant, possibly Jovian-mass companion to PSR B1620-26, a 11-millisecond pulsar in the globular cluster M4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008279312993
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  • 10
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    Confirmation of Earth-Mass Planets Orbiting the Millisecond Pulsar PSR B1257 + 12 (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-04-22
    Description: The discovery of two Earth-mass planets orbiting an old ( approximately 10(9) years), rapidly spinning neutron star, the 6.2-millisecond radio pulsar PSR B1257+12, was announced in early 1992. It was soon pointed out that the approximately 3:2 ratio of the planets' orbital periods should lead to accurately predictable and possibly measurable gravitational perturbations of their orbits. The unambiguous detection of this effect, after 3 years of systematic timing observations of PSR B1257+12 with the 305-meter Arecibo radiotelescope, as well as the discovery of another, moon-mass object in orbit around the pulsar, constitutes irrefutable evidence that the first planetary system around a star other than the sun has been identified.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolszczan, A -- New York, N.Y. -- Science. 1994 Apr 22;264(5158):538-42.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17732735" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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