< Radiation astronomy < Neutrals
This image is an all-sky map of neutral atoms streaming in from the interstellar boundary. Credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.

Radiation astronomy/Neutrals is a lecture from the radiation astronomy department. It is under development for possible inclusion in the course on the principles of radiation astronomy.

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Quiz

  

1 Yes or No, Although electrically neutral atoms from the interstellar volume can penetrate the heliosphere, virtually all of the material in the heliosphere emanates from the Sun itself.

No
Yes

2 Complete the text:

Charged-current charged pion production is a process in which a

interacts with an atomic

and produces a

, a charged

and recoiling nuclear fragments.

3 True or False, An neutral antimuon is a neutral muon spinning backward in time.

TRUE
FALSE

4 Which of the following are associated with the IceCube Neutrino Observatory?

under ice
the Amundsen-Scott South Pole Station
Digital Optical Modules
the counting house is on the surface above the array
the baryon neutrino
the electron neutrino

5 True or False, Like all elementary particles, the neutral meson has a corresponding antiparticle of opposite spin but equal mass and charge.

TRUE
FALSE

6 Which of the following are associated with electromagnetics?

angular momentum transfer
solar wind
protons
electrons
the baryon neutrino
charge neutralization

7 True or False, Van Allen radiation belt electrons are constantly removed by collisions with atmospheric neutrals, losses to the magnetopause, and outward radial diffusion.

TRUE
FALSE

8 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

9 Yes or No, T]he boundary at the edge of our heliosphere where material streaming out from the sun interacts with the galactic material emits no light and no conventional telescope can see it.

No
Yes

10 Complete the text:

Match up the item letter with each of the possibilities below:
Meteors - A
Cosmic rays - B
Neutrons - C
Protons - D
Electrons - E
Positrons - F
Gamma rays - G
Superluminals - H
X-ray jets

the index of refraction is often greater than 1 just below a resonance frequency

.
iron, nickel, cobalt, and traces of iridium

.
Sagittarius X-1

.
escape from a typical hard low-mass X-ray binary

.
collisions with argon atoms

.
X-rays are emitted as they slow down

.
Henry Moseley using X-ray spectra

.

Hypotheses

  1. In the absence of gravity high-density baryonic matter is bound by purely strong forces.

See also

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