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  • 1
    Electronic Resource
    Electronic Resource
    Gravitational Radiation, Gravitational Collapse, and Numerical Relativity (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 470 (1986), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1986.tb47979.x
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  • 2
    Electronic Resource
    Electronic Resource
    PROBLEMS AND SOLUTIONS IN NUMERICAL RELATIVITY (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 375 (1981), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1981.tb33686.x
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  • 3
    Electronic Resource
    Electronic Resource
    Nucleosynthesis, neutrino bursts and γ-rays from coalescing neutron stars (1989)
    [s.l.] : Nature Publishing Group
    Nature 340 (1989), S. 126-128 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The binary pulsar system will coalesce in roughly 108 yr. Using this fact together with the pulsar birth rate and the observed frequency of occurrence of close binary pulsars (then, one in every 300 pulsars), Clark et al.3 estimated the formation rate in the Galaxy to be (3 ± 1.6) x 10~4 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/340126a0
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  • 4
    Electronic Resource
    Electronic Resource
    A gravitational analogue of Faraday rotation (1985)
    [s.l.] : Nature Publishing Group
    Nature 318 (1985), S. 271-273 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The general cylindrical Kompaneets Jordan Ehlers line element involves three functions ?, ?, and ?, of r and t only, ? And ? represent the two dynamical degrees of freedom of the gravitational field, + and ? respectively; while ? plays the role of the total gravitational energy4. The Einstein ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/318271a0
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  • 5
    Electronic Resource
    Electronic Resource
    Jets in supernova 1987A? (1987)
    [s.l.] : Nature Publishing Group
    Nature 330 (1987), S. 28-28 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR- Speckle observations1 2 of SN1987A reveal a secondary light source, 2-3 magnitudes dimmer than the primary and 0.057±0.014 arc s away from it. Its luminosity L2 is thus ^ 1040 erg s'1, and it is (4.6±l.l)xl016cm from the supernova itself. This separation, at ^ 2.6xl06 s, after ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/330028b0
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  • 6
    Electronic Resource
    Electronic Resource
    Astronomy Glowing embers (2003)
    [s.l.] : Nature Publishing Group
    Nature 422 (2003), S. 268-269 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Gamma-ray bursts (GRBs) are short, intense flashes of γ-rays that arrive from random directions in the sky. They are followed by an 'afterglow' — decaying signals at longer wavelengths that may last weeks, months or even years. Until now, afterglows had only been picked up some time ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/422268a
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  • 7
    Electronic Resource
    Electronic Resource
    Can soft γ-ray bursts be emitted by accreting black holes? (1975)
    [s.l.] : Nature Publishing Group
    Nature 256 (1975), S. 112-113 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] With Katz, we have shown2 that photons, which free-fall into a Kerr horizon to be Compton scattered by tangentially moving electrons, can acquire very high energies by the Penrose mechanism. The scattered electrons share their negative energy with the protons; thus, the excess photon energy may be ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/256112a0
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  • 8
    Electronic Resource
    Electronic Resource
    Astrophysics refreshed shocks from a γ-ray burst (2003)
    [s.l.] : Nature Publishing Group
    Nature 426 (2003), S. 138-139 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In addition to its remarkable supernova signature, the γ-ray burst of 29 March 2003 (GRB030329) had two interesting peculiarities: an unusually low-energy output in γ-rays and a large bump in its afterglow light curve after 1–2 days (followed by several less significant ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/426138a
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  • 9
    Electronic Resource
    Electronic Resource
    Gravitational waves and red shifts: A space experiment for testing relativistic gravity using multiple time-correlated radio signals (1983)
    Springer
    General relativity and gravitation 15 (1983), S. 129-163 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We describe an experimental technique for detecting extremely low-frequency pulses of gravitational radiation (ν GW ∼ 1–10 mHz) originating from collapsing supermassive objects (M ∼ 106−107 m ⊙) occurring anywhere in the universe. Our technique is the natural outgrowth of a previous gravitational space mission. The novelty of our approach is in placing a highly stable hydrogen maser onboard a deep-space probe that controls a transmitter sending signals to earth. The spacecraft also includes a doppler transponder operating in the conventional two-way mode. Doppler tracking using simultaneously acquired one- and two-way information both on the spacecraft and at the earth station provides four time-records of frequency fluctuations. A single gravitational disturbance manifests itself as a uniquely determined pulse sequence in the two or more data sets whose amplitudes and arrival times depend on a single parameter. The repetition of the signal and the noises in the data can be used in a filtering scheme to improve the amplitude sensitivity by a factor of about 6 in amplitude (36 in energy). We believe the most likely of these gravitational pulse events occurring frequently enough to be detected (more than once per year) will come from the formation of black holes in the cores of ordinary spiral galaxies. We propose a technologically feasible and realistic space mission, using the above technique, to measure two aspects of gravitation with the same experimental equipment. The spaceflight begins in a highly eccentric earth orbit to measure the gravitational red shift and the second-order doppler effects to an accuracy of 5 parts in 106; at this level significant new tests of nonmetric theories of gravity are possible. Later, the spacecraft is sent into a heliocentric orbit to distances beyond 6 AU to search for gravitational radiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00762473
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  • 10
    Electronic Resource
    Electronic Resource
    Self-similar spherical gravitational collapse and the cosmic censorship hypothesis (1988)
    Springer
    General relativity and gravitation 20 (1988), S. 7-13 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We show that a self-similar general relativistic spherical collapse of a perfect fluid with an adiabatic equation of statep=(γ−1)ϱ and low enough γ values, results in a naked singularity. The singularity is tangent to an event horizon which surrounds a massive singularity and the redshift along a null geodesic from the singularity to an external observer is infinite. We believe that this is the most serious counter example to cosmic censorship obtained so far.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00759251
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