Stars/Star fissions/Quiz

Star fission is a lecture about a specific theory from astrophysics for the origin of binary or multiple star systems. It is an original research project and part of the radiation astronomy department. It has been included in the course on the principles of radiation astronomy.

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Quiz
{Piezonuclear reactions associated with fission may include + occurring in inert and non-radioactive elements + high pressure + brittle fracture + solids under compression + low-energy reactions + take place in nuclei with an atomic weight ≤ iron
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{Complete the text: Yarkovsky–O'Keefe–Radzievskii–Paddack (YORP) { torques|torque (i) } lead many objects to { fission (i) } and then reaccrete.
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{Chemical and physical phenomena that may be associated with core formation are + a deficiency of some noble metals in the crust of the Earth + leaching by metallic iron + a liquid Earth + a loss of mechnical energy by conversion to heat + low viscosity - elasticity
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{True or False, While fusion may be the primary mechanism by which first generation stars produce energy, repulsion between like nucleons may cause neutron emission from a collapsed core. + TRUE - FALSE
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{Which of the following is not a prominent feature associated with solar clouds? - coronal mass ejections - magnetic clouds + rotation - coronal clouds - plasma - magnetic field lines
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{True or False, In the evolution of elements much more material has gone into the even-numbered elements than into those which are odd. + TRUE - FALSE
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{In general there is no proper motion at all in the plage or the surrounding? { plagettes (i) }
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{True or False, "Some prominences break apart and give rise to coronal mass ejections." + TRUE - FALSE
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{Complete the text: "When a prominence is viewed from a different perspective so that it is against the { Sun|sun|star (i) } instead of against space, it appears { dark|darker (i) } than the surrounding { background (i) }.
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{True or False, With respect to the core of the Sun, the high-hydrogen, low-iron model was suddenly adopted without opposition. + TRUE - FALSE
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{About one third of ejecta observed by satellites at Earth is composed of what? { magnetic clouds (i) }
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{Yes or No, A spotless flare may occur in a plage region during its first rotation. + Yes - No
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{Nuclear fission and nuclear fusion may be connected by which of the following? + means for concentrating actinide elements and for separating actinide elements from reactor poisons exist + thermonuclear fusion reactions in stars are ignited by nuclear fission energy - dark matter + the feasibility of thermal neutron fission and fast neutron fission in planetary and protostellar matter may be calculated from nuclear reactor theory - brown dwarfs
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{For a few special cases, rotational velocities for protostars have been obtained directly from observations of the outer optically { thin (i) } regions.
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{Complete the text: In the case of B335, { rotation (i) } is not important in determining the { force (i) } balance in the outer regions, and this object is in fact undergoing { gravitational (i) } collapse.
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{Complete the text: Match up the likely type of star fission with each of the possibilities below: a triple-component stellar multiple - A massive star fission - B semidetached binary - C a separating close contact binary - D ZAMS system - E tight, circular orbit, impossible to tell eclipses - F lobate star - G coronal mass ejection - H BH Centauri { D (i) }. Plaskett's Star (HR 2422) { B (i) }. Betelgeuse { G (i) } W Ursae Majoris { F (i) }. Beta Lyrae { C (i) }. V1010 Ophiuchi { E (i) } object is confirmed to be co-moving { A (i) }. Sun { H (i) }.
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