Results 201 to 210 of about 6,365,367 (245)

Size of a γ-ray burster optical emitting region

Nature, 1983
Most models of γ-ray bursters require the formation of a thermal plasma, whose properties are relatively insensitive to its mode of formation. Radiation at lower photon energies or during quiescence may be more diagnostic of the underlying cause of the γ-
Bradley E. Schaefer, George R. Ricker
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A model for the rapid X-ray Burster

Astrophysics and Space Science, 1979
A model for the Rapid X-ray Burster (MXB 1730-333) based on an accreting rotating magnetized neutron star in a binary system is proposed. The bursts are attributed to instabilities produced at an equilibrium surface above the poles of the neutron star, which is created by the infalling gas supported by a combination of radiation and relativistic gas ...
Krishna M. V. Apparao, S. M. Chitre
openaire   +1 more source

Evidence for spectroscopic periodicity in an X-ray burster

Publications of the Astronomical Society of the Pacific, 1983
Optical spectrograms of the X-ray burster 1735-44 have been obtained on parts of four nights with 30-minute time resolution and 3 A-5 spectral resolution. SIT Vidicon data on two nights show variations in intensity and velocity of N III, C III, and He II which appear to execute a 2.86-hour cycle.
J. B. Hutchings, A. P. Cowley, D. Crampton   +2 more
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General relativity effects in X-ray bursters

Astronomical and Astrophysical Transactions, 2001
Abstract Relativistic effects could eventually be detected in X-ray bursters; the conclusions of Castagnino and Umerez (1983) can be improvement.
A. Malavoltta, R. Santarelli, H. Lanas, R. Aquilano   +3 more
exaly   +2 more sources

Globular cluster origin of x-ray bursters

AIP Conference Proceedings, 1984
X‐ray bursters and galactic bulge x‐ray sources, or the most luminous x‐ray sources in the galaxy, are reasonably well constrained in their basic nature but not in their origin. We have suggested they may all have been produced by tidal capture in high density cores of globular clusters, which have now largely been disrupted by tidal stripping and ...
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The X-Ray Activity of the Rapid Burster in 1983

Publications of the Astronomical Society of Japan, 1985
Abstract The rapid burster became active on August 5, 1983 after a long quiescence of four years. In this active period, the source exhibited several new features. It started to emit a train of bursts which apparently resemble to type I bursts, with quasi-periodic occurrence (74–90 min) superposed on a strong persistent component of ~ 50
Hideyo Kunieda, Yuzuru Tawara, Satio Hayakawa, Fumiaki Nagase, Hajime Inoue, Nobuyuki Kawai, Fumiyoshi Makino, Kazuo Makishima, Masaru Matsuoka, Toshio Murakami, Minoru Oda, Yoshiaki Ogawara, Takaya Ohashi, Yasuo Tanaka, Izumi Waki   +14 more
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X-ray Bursters - The Hot Road to Chaos?

1985
Helium shell burning, at the base of an accreted envelope on the surface of a neutron star, is described in terms of a simple two zone model.
Odev Regev, Mario Livio
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EXOSAT results on the X-ray burster 2S1254-690

Space Science Reviews, 1985
EXOSAT observations of 2S1254-690 in August 1984 have confirmed the presence of periodic dips in the X-ray intensity. These dips occurred with a period of 3.9 hours and last for about 50 minutes. During individual dips the observed X-ray flux oscillated several times between the quiescent level and an undetectable level on time scales varying from a ...
ThierryJ.-L. Courvoisier, ArvindN. Parmar, Tony Peacock   +2 more
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