Astronomy/Backgrounds/Quiz

< Astronomy < Backgrounds
This image depicts the two gigantic gamma-ray bubbles at the heart of the Milky Way. Credit: NASA's Goddard Space Flight Center.

Background astronomy is a lecture and an article as part of the astronomy department's astronomy project. Although under development, it may be used as a lecture in the advanced undergraduate course principles of radiation astronomy.

You are free to take this quiz based on background astronomy at any time.

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

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Quiz

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1. Yes or No, The temperature distribution of the intergalactic medium (IGM) depends on whether or not there exist strong galactic winds.

Yes
No

2. Which of the following are theoretical radiation astronomy phenomena associated with a satellite in orbit around the Earth?

background radiation
a charged particle wind which emanates out of a beam line
gravity
near the barycenter for the Earth-Moon system
swirls of tan, green, blue, and white in the water
electric arcs
chlorophyll-containing phytoplankton aloft in the upper atmosphere

3. Yes or No, The temperature distribution of the intergalactic medium (IGM) depends on whether or not there exist strong galactic winds.

Yes
No

4. A cosmic ray may originate from what astronomical source?

Jupiter
the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
an active galactic nucleus

5. Yes or No, High energy neutrinos may interact to produce a large cascade of particles.

Yes
No

6. Complete the text:

Cosmic rays with energies over the energy of 5 x 1019 interact with photons to produce via the \Delta resonance.

7. Yes or No, The main components of background noise in neutron detection are high-energy photons, which aren't easily eliminated by physical barriers.

Yes
No

8. Which of the following are astrophysical components contributing to the sky background?

sets of point sources like faint asteroids
a charged particle wind
Galactic stars
far away galaxies
swirls of tan, green, blue, and white in the water
dust in the Solar System
dust in the Milky Way
dust in intergalactic space

9. Complete the text:

A proof-of-concept structure, including a control group, consists of , procedures, findings, and .

10. Which of the following are cold dark matter gamma rays?

expected signal comparable to background
annihilation radiation
a pronounced cosmic-ray halo
difficult to separate from a dark halo
dwarf spheroidals
weakly interacting massless particles

11. Complete the text:

The (CIB) causes a significant attenuation for very high energy through Compton , and electron-positron pair production.

12. Which of the following are likely associated with a green emission line control group?

rocky objects
high peak to background
plasma objects
a G2V photosphere
rotation
watery surface
spots

13. With respect to electromagnetic radiation, which of the following are types of backgrounds?

cosmic optical background (COB)
cosmic dust
cosmic ultraviolet background (CUVB)
cosmic X-ray background (CXB)
cosmic cyanogen background (CCB)
cosmic infrared background (CIB)
rocky objects
diffuse extragalactic background radiation
extragalactic background light (EBL)
CMB
meson background
cosmic gamma-ray background (CGB)
cosmic radio background

Your score is 0 / 0

Research

Hypothesis:

  1. Sometimes the apparent background is actually the signal.

Control groups

This is an image of a Lewis rat. Credit: Charles River Laboratories.

The findings demonstrate a statistically systematic change from the status quo or the control group.

“In the design of experiments, treatments [or special properties or characteristics] are applied to [or observed in] experimental units in the treatment group(s).[1] In comparative experiments, members of the complementary group, the control group, receive either no treatment or a standard treatment.[2]"[3]

Proof of concept

Def. a “short and/or incomplete realization of a certain method or idea to demonstrate its feasibility"[4] is called a proof of concept.

Def. evidence that demonstrates that a concept is possible is called proof of concept.

The proof-of-concept structure consists of

  1. background,
  2. procedures,
  3. findings, and
  4. interpretation.[5]

See also

References

  1. ↑ Klaus Hinkelmann, Oscar Kempthorne (2008). Design and Analysis of Experiments, Volume I: Introduction to Experimental Design (2nd ed.). Wiley. ISBN 978-0-471-72756-9. http://books.google.com/?id=T3wWj2kVYZgC&printsec=frontcover.
  2. ↑ R. A. Bailey (2008). Design of comparative experiments. Cambridge University Press. ISBN 978-0-521-68357-9. http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=9780521683579.
  3. ↑ "Treatment and control groups, In: Wikipedia". San Francisco, California: Wikimedia Foundation, Inc. May 18, 2012. Retrieved 2012-05-31.
  4. ↑ "proof of concept, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. November 10, 2012. Retrieved 2013-01-13.
  5. ↑ Ginger Lehrman and Ian B Hogue, Sarah Palmer, Cheryl Jennings, Celsa A Spina, Ann Wiegand, Alan L Landay, Robert W Coombs, Douglas D Richman, John W Mellors, John M Coffin, Ronald J Bosch, David M Margolis (August 13, 2005). "Depletion of latent HIV-1 infection in vivo: a proof-of-concept study". Lancet 366 (9485): 549-55. doi:10.1016/S0140-6736(05)67098-5. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1894952/. Retrieved 2012-05-09.

External links

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Educational level: this is a research resource.
Resource type: this resource is a quiz.
Subject classification: this is an astronomy resource.
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