Stars/Surface fusion/Quiz

Stellar surface fusion is a lecture. Although a research project on its own, it is also part of the radiation astronomy department course on the principles of radiation astronomy.

You are free to take this quiz based on stellar surface fusion at any time.

To improve your scores, read and study the lecture, the links contained within, listed under See also, External links, and in the template. This should give you adequate background to get 100 %.

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Quiz
{Complete the text: Match up the type of stellar surface fusion with each of the possibilities below: symbiotic nova - A recurrent nova - B flare star (flaring) - C accretion - D coronal loops - E amplitude of between 9 and 11 magnitudes { A (i) }. a close companion star that overflows its Roche lobe { D (i) }. about every 20 years { B (i) }. unpredictable dramatic increases in brightness for a few minutes { C (i) }. the basic structure of the lower corona and transition region { E (i) }
 * type="{}"}

{Complete the text: One example of a { symbiotic|symbiot (i) } nova is V1016 Cygni, whose { outburst (i) } in 1971–2007 clearly indicated a { thermonuclear (i) } explosion.
 * type="{}"}

{The source above the photosphere of the Sun for reactions producing neutrinos is likely to be which of the following? - a neutrino emitting isotope created in the photosphere - the Small Magellanic Cloud - blue rays emitted by the photosphere through the reverse Compton effect + reactions during or preceding a solar flare - accretion of gas from its stellar companion
 * type=""}

{Yes or No, In a cyclotron on Earth 261Rg can be created using about 290 MeV to accelerate say 64Ni into bismuth, in a coronal loop or flare in the atmosphere of the Sun where up to about 400 MeV expenditures have been detected, nickel can be accelerated up to about 290 MeV into bismuth to create roentgenium. + Yes - No
 * type=""}

{Nuclear physics phenomena associated with the atmosphere of the Sun are - symbiotic novae + coronal loops acting like particle accelerators + nanoflares - high atmospheric pressure + deuterium + emitted neutrons
 * type="[]"}

{Which of the following is not a phenomenon usually associated with solar wanderers? - green aurora - oxygen + production of 7Be - carbon or C2 - airglow - nitrogen - olivine
 * type=""}

{True or False, Elements above iron in atomic number cannot be created by accelerator fusion in the atmosphere of the Sun. - TRUE + FALSE
 * type=""}

{Which of the following is not characteristic of a neutrino? - neutrinos are affected by the weak nuclear force + produced by a positron annihilating an electron - a decay product of a neutron - produced by the near surface fusion on the Sun - may have a mass - comes in mutable varieties
 * type=""}

{True or False, Elements above iron or nickel in atomic number cannot be created by fusion in the core of the Sun. + TRUE - FALSE
 * type=""}

{Beta particles may be the key to? { fusion|nuclear fusion (i) }
 * type="{}"}

{True or False, Current (2014) neutrino detectors here on Earth are sophisticated enough to differentiate neutrinos generated in the core of the Sun from those generated above the photosphere of the Sun. - TRUE + FALSE
 * type=""}

{Which of the following are theoretical radiation astronomy phenomena associated with the Sun? + a core which emits neutrinos - a solar wind which emanates out the polar coronal holes + gravity + the barycenter for the solar system - polar coronal holes - coronal clouds + its position
 * type="[]"}

{True or False, If a white dwarf has a close companion star that overflows its Roche lobe, the white dwarf will steadily accrete gas from the companion's outer atmosphere. + TRUE - FALSE
 * type=""}

{Which of the following are theoretical radiation astronomy phenomena associated with a planet? + possible orbits - a hyperbolic orbit - nuclear fusion at its core - nuclear fusion in its ionosphere - near the barycenter of its stellar system + accretion + electric arcs + impact craters
 * type="[]"}

{True or False, The dependence of the hydrogen fusion rate on temperature and pressure means that it is only when it is compressed and heated at the surface of the white dwarf to a temperature of some 20 million kelvin that a nuclear fusion reaction occurs. + TRUE - FALSE
 * type=""}

{Which of the following are theoretical radiation astronomy phenomena associated with a star? + possible orbits + a hyperbolic orbit + nuclear fusion at its core + nuclear fusion in its chromosphere + near the barycenter of its planetary system + accretion + electric arcs - impact craters - radar signature
 * type="[]"}

{True or False, A flare star is a variable star that can undergo unpredictable dramatic increases in brightness for a few minutes. + TRUE - FALSE
 * type=""}

{A recurrent nova is produced by a white dwarf star and a red giant circling about each other in a close? { orbit (i) }
 * type="{}"}

{Complete the text: Match up the likely surface fusion activity with the image: CME - A coronal clouds - B solar flare - C neutrinos from the solar octant - D coronal loops - E prominences - F { D (i) }. { A (i) }. { F (i) }. { C (i) }. { E (i) } { B (i) }.
 * type="{}"}

{True or False, AG Draconis is a known (SIMBAD) X-ray source. + TRUE - FALSE
 * type=""}

Hypotheses

 * 1) Surface fusion occurs because the interstellar electron influx has high enough energy to cause fusion of lighter nuclei.