light-day


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light-day

[′līt‚dā]
(astronomy)
The distance traveled by light in 1 day in a vacuum.
References in periodicals archive ?
Thanks to this unique dataset, we could show that the most energetic radiation is emitted in the central light-day away from the supermassive black hole and, more importantly, that the energy decreases with distance to the black hole almost exactly in the way predicted by theory," said Alexander Eigenbrod, who completed the analysis of the data.
Careful study of the light echoes shows that the dust clouds are dense but thin sheets of material, perhaps only a light-day or so-thick.
There's a huge ring of ingestable debris at a radius of about 24 light-days, at which distance it would take about five years to fall into the black hole.
This gas streamer probably originates near the accretion disk, mere light-days from the central black hole, and flows outward at 1,000 kilometers per second (2 million mph).
The team measured the diameter of the disc of hot matter, and plotted how hot it is at different distances from the centre, and found that the disc is between four and eleven light-days across (approximately 100 to 300 billion kilometres).
Generated using nine radio telescopes arrayed across the Southern Hemisphere, the images reveal features just 15 light-days across in the heart of the galaxy Centaurus A (galaxy shown at left).
Our discovery is a giant leap in terms of observing frequency, thanks to the use of ALMA, and in terms of distance to the black hole where the magnetic field has been probed -- of the order of only a few light-days from the event horizon.
3 gigahertz) resolve details only about 15 light-days across, or about 0.
Radio-emitting features as small as 15 light-days can be seen, making this the highest-resolution view of galactic jets ever made.
Twin jets emitting radio waves, each moving in the opposite direction, were found within 4 light-days of the black hole just days after the observation of the flare.
A quasar accretion disc has a typical size of a few light-days, or around 100 billion kilometers across, but they lie billions of light-years away.
The innermost stars that the team measured lie just 5 light-days from Sagittarius [A.