منابع مشابه
Searching for Pulsars in Close Binary Systems
We present a detailed mathematical analysis of the Fourier response of binary pulsar signals whose frequencies are modulated by circular orbital motion. The fluctuation power spectrum of such signals is found to be νorb-periodic over a compact frequency range, where νorb denotes orbital frequency. Subsequently, we consider a wide range of binary systems with circular orbits and short orbital pe...
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Most of the ~600 known pulsars are single and located in the disk of our Galaxy. There is circumstantial evidence that the pulsars in this majority are created in supernova (SN) explosions, by the collapse of the cores of massive stars (initial mass Mi >~ Met "~ 8 Mo). One is created roughly every 100 y in the Galaxy. Figure 1 is a plot of the pulse period (P) versus the dipole field strength (...
متن کاملBinary and Millisecond Pulsars
We review the main properties, demographics and applications of binary and millisecond radio pulsars. Our knowledge of these exciting objects has greatly increased in recent years, mainly due to successful surveys which have brought the known pulsar population to over 1700. There are now 80 binary and millisecond pulsars associated with the disk of our Galaxy, and a further 103 pulsars in 24 of...
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Equilibrium uid con gurations for close binary systems can become globally unstable. Instabilities arise from the strong tidal interaction between the two components, which tends to make the e ective two-body potential governing the orbital motion steeper than 1=r. As a result, a circular orbit can become unstable to small radial perturbations. The instability can be either secular or dynamical...
متن کاملThe Formation of Close Binary Systems
A viable solution to the origin of close binary systems, unaccounted for in recent theories, is presented. Fragmentation, occurring at the end of the secondary collapse phase (during which molecular hydrogen is dissociating), can form binary systems with separations less than 1 au. Two fragmentation modes are found to occur after the collapse is halted. The rst consists of the fragmentation of ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1971
ISSN: 0074-1809
DOI: 10.1017/s0074180900007567