The timeline below shows a brief description of the most important discoveries of the Arecibo Observatory.
The timeline below shows a brief description of the most important discoveries of the Arecibo Observatory.
-This has upended the widely held view that all pulsars are the orderly ticking clocks of the universe.
-150 hours of observing time at Arecibo revealed that a has not changed by more than 1.3 parts in a million in these three billion years.
-This temperature is so high that it forces astronomers to question the traditional model - synchrotron radiation - for the emission emanating from the vicinity of the supermassive black hole.
- FRBs are millisec-duration, radio pulses that appear to be extragalactic. - The repeater demonstrates that its source survives the bursts and rules out a class of models requiring catastrophic explosions.
- Upper limits are already constraining models of space-time strain.
- This distance was just confirmed by the Gaia Collaboration.
- We can now measure the foreground dust signal more precisely, improving our ability to uncover the B-mode signature of inflation.
- This will provide the best test for the strong equivalence principle, an order on magnitude better than the Sun-Earth-Moon system.
In subsequent observations, an entire planetary system was found around the pulsar PSR 1257+12.
- The ice persists in shadowed craters despite the high temperatures, 800°F, at the surface; this discovery was confirmed in 2014 by NASA’s MESSENGER spacecraft.
- Arp 220 is a merger undergoing a burst of star formation; the population inversion is produced by IR radiation from dust.
- This discovery of a second class of pulsar led to the suggestion that pulsars can spin-up by accreting mass from a companion.
- Optical images show only the top of the thick cloud layer.
- The 1993 Nobel Prize in Physics was awarded to Hulse and Taylor for this discovery.
- Only sporadic radio pulses from the Crab nebula supernova remnant were know before Arecibo.
- The rotation is not tidally locked, but rather, the rate is an orbital resonance with 2 orbits for every 3 rotations.