SCO X-1: Hints of Periodic Variability at Radio Frequencies

Details SCO X-1: Hints of Periodic Variability at Radio Frequencies SCO X-1: Hints of Periodic Variability at Radio Frequencies

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...481..489b&link_type=abstract

Astrophysical Journal v.481, p.489

Astronomy and Astrophysics

Astronomy

7

Radiation Mechanisms: Nonthermal, Radio Continuum: Stars, Stars: Individual Constellation Name: Scorpius X-1

Scientific paper

We present the results of the flux density variability observations of Sco X-1 obtained during six VLA observing sessions between 1981 and 1990. The light curves indicate three timescales of flux density variation: slow, intermediate, and rapid. The rapidity of the variations sets a conservative upper limit on size of ~6 mas, assuming a distance of 200 pc, from light travel arguments for the radio-emitting regions. The corresponding brightness temperature of greater than 107 K indicates a nonthermal origin for the radio emission. A detailed analysis of the light curves suggests that the radio emission may exhibit true periodicity on timescales of ~3 hr. We also provide a prescription for accurate signal recovery and image restoration of point and extended sources when an object of varying signal is present in the synthesized beam.

Affiliated with

Also associated with

No associations

Rating

SCO X-1: Hints of Periodic Variability at Radio Frequencies 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 SCO X-1: Hints of Periodic Variability at Radio Frequencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SCO X-1: Hints of Periodic Variability at Radio Frequencies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-836127