Taylor and Hulse received the 1993 Nobel Prize for their discovery. The contraction of the pulsar’s orbit over time is perfectly explained by the emission of gravity waves from the system, indirectly confirming their existence. ![]() Jocelyn Bell is famous for not having shared the Nobel Prize for the discovery of pulsars (won by Anthony Hewish and Martin Ryle, however she did win the (more lucrative) Breakthrough prize in 2018.īinary pulsar: The so-called Taylor-Hulse pulsar is a binary system of two neutron stars but only one of which is detected as a pulsar. Wikipedia has good entries for neutron stars and for the pulsars that revealed their existence. A kilonova is about one thousand times brighter than a nova (which occurs when a compact white dwarf star accretes matter from a binary companion) but about one thousand times fainter than a typical supernova. The glow of a kilonova (not introduced during the animation) is caused by the decay of radioactive nuclides produced during the r process. Long associated with supernovae but never observed, the site of the r process was revealed by the dramatic detection of the neutron-star merger described in this animation, which produced a kilonova. The site of the r (for rapid neutron capture) process is one of the "top eleven questions of physics" (see question 3). A layman’s explanation is given by National Geographic.Īn authoritative work on the physics of neutron stars is by Lattimer and Prakash, published in the magazine Science:(a pre-publication version is available from the arXiv). Hoyle (1957), "Synthesis of the Elements in Stars" Reviews of Modern Physics 29 (4): 547.Ī nice book describing neutron stars, gravity waves and associated phenomenon is “New Eyes on the Universe: 12 cosmic mysteries and tools we need to solve them,” by Stephen Webb (Springer/Praxis Publishing, Chichester, 2012). The landmark paper describing the various processes of stellar nucleosynthesis is referred to as B2FH (after the authors): E. A classic text book describing nucleosynthesis and stellar evolution is “Cauldrons in the Cosmos,” by C.E. Such stars end their lives as white dwarfs. In lighter, more typical stars (like our sun, which is called a main-sequence star) fusion of the light element takes billions of years but there is not enough material to synthesize elements beyond carbon and oxygen. ![]() Heavier stars, like bonfires, burn more quickly. Supernova only happen for heavy stars, about ten times the mass of the sun. ![]() An explanation of how fusion forms heavy elements in stars can be found in this TED-Ed video and its Dig Deeper section.
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