منابع مشابه
X-ray Detection of Psr B1259?63 at Periastron
We report on results of X-ray observations of the unique radio pulsar/Be star binary PSR B1259?63, obtained using the ASCA satellite two weeks before, during , and two weeks after the pulsar's most recent periastron passage on January 9, 1994. The source was detected at all three epochs, with an X-ray luminosity in the 1{10 keV band of 110 34 (d=2 kpc) 2 erg s ?1 at the pre-and post-periastron ...
متن کاملThe 2000 periastron passage of PSR B 1259 – 63
We report here on a sequence of 28 observations of the binary pulsar system PSR B1259−63/SS2883 at four radio frequencies made with the Australia Telescope Compact Array around the time of the 2000 periastron passage. Observations made on 2000 September 1 show that the apparent rotation measure (RM) of the pulsar reached a maximum of −14800 ± 1800 rad m−2, some 700 times the value measured away...
متن کاملWas the Propeller Mechanism Active during the Periastron Passage of Psr 1259{63?
Timing analisys of PSR 1259{63 during its recent periastron passage suggested that the pulsar was spinning-down due to the propeller mechanism (Manch-ester et al. 1995). This requires that the radio pulsar mechanism is temporarily quenched. On the basis of the Be equatorial disk model derived from the dispersion and rotation measures analysis (Melatos et al. 1995), we show that the mass innow i...
متن کاملThe 1997 periastron passage of the binary pulsar PSR B 1259 − 63
We report here on multifrequency radio observations of the pulsed emission from PSR B1259–63 around the time of the closest approach to its B2e companion star. There was a general increase in the pulsar’s dispersion measure and scatter broadening, and a decrease in the flux density towards periastron although changes in these parameters were seen on timescales as short as minutes. The pulsed em...
متن کاملRadio Observations of PSR B 1259 – 63 through the 2004 periastron passage
We report here on extensive radio observations of the binary system containing PSR B1259−63 and the Be star SS 2883, made around the time of the 2004 peri-astron. This is the fourth periastron to have been observed in detail. As in previous observations, changes in the pulsar's dispersion and rotation measures are detected over a period spanning 200 days. We show that the eclipse of the pulsed ...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1996
ISSN: 0252-9211
DOI: 10.1017/s0252921100042226