Computer Science
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.334..684v&link_type=abstract
Nature (ISSN 0028-0836), vol. 334, Aug. 25, 1988, p. 684-686.
Computer Science
38
Eclipsing Binary Stars, Optical Measurement, Pulsars, Brightness, Charge Coupled Devices, H Alpha Line, Light Curve
Scientific paper
Optical CCD images of the eclipsing binary radio pulsar PSR1957 + 20 have been obtained which show that the optical counterpart of the pulsar is one component of a close visual pair separated by about 0.7 arcsec. At maximum both are equally bright with combined V magnitude of 19.9, while at minimum PSR1957 + 20 is invisible. From spectroscopic observations, it is found that the contaminating star is a normal G star. The spectrum of PSR1957 + 20 shows intermittent H-alpha emission. It is confirmed that the optical brightness of PSR1957 + 20 varies in phase with the radio Doppler velocity curve, and it is found that the amplitude is probably more than three magnitudes, minimum light coinciding with the radio eclipse. The optical light curve is consistent with heating of a hydrogen-rich low-mass white dwarf by high-energy radiation from the nearby millisecond pulsar.
Allington-Smith Jeremy
Callanan Paul
Charles Phil A.
Hassall B. J. M.
Machin Graham
No associations
LandOfFree
Optical observations of the eclipsing binary radio pulsar PSR1957 + 20 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Optical observations of the eclipsing binary radio pulsar PSR1957 + 20, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical observations of the eclipsing binary radio pulsar PSR1957 + 20 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1695362