Possible Evidence for an Event Horizon in Cyg XR-1

Details Possible Evidence for an Event Horizon in Cyg XR-1 Possible Evidence for an Event Horizon in Cyg XR-1

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19711805d&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #118.05; Bulletin of the American Astronomical Society, Vol. 32, p.1604

Astronomy and Astrophysics

Astronomy

Scientific paper

The X-ray emitting component in the Cyg XR-1/HDE226868 system is a leading candidate for identification as a stellar-mass sized black hole. The positive identification of a black hole as predicted by general relativity requires the detection of an event horizon surrounding the point singularity. One signature of such an event horizon would be the existence of dying pulse trains emitted by material spiraling into the event horizon from the last stable orbit around the black hole. We observed the Cyg XR-1 system at three different epochs in a 1400 - 3000 A bandpass with 0.1 ms time resolution using the Hubble Space Telescope's High Speed Photometer. Repeated excursions of the detected flux by more than 3 standard deviations above the mean are present in the UV flux with FWHM 1 - 10 ms. If any of these excursions are pulses of radiation produced in the system (and not just stochastic variability associated with the Poisson distribution of detected photon arrival times), then this short a timescale requires that the pulses originate in the accretion disk around Cyg XR-1. Two series of pulses with characteristics similar to those expected from dying pulse trains were detected in 3 hours of observation.

Affiliated with

Also associated with

No associations

Rating

Possible Evidence for an Event Horizon in Cyg XR-1 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 Possible Evidence for an Event Horizon in Cyg XR-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Possible Evidence for an Event Horizon in Cyg XR-1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1728652