Stars/Infrareds/Quiz

Combined observations from NASA's Spitzer Space Telescope and the newly completed Atacama Large Millimeter/submillimeter Array (ALMA) in Chile have revealed the throes of stellar birth, as never before, in the well-studied object known as HH 46/47. Credit: NASA/JPL-Caltech/ALMA.

Infrared stars is a lecture from the department of radiation astronomy possibly for the course on the principles of radiation astronomy and is already in the star courses.

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Quiz

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Points for an incorrect answer:
Ignore the questions' coefficients:

1 The Sun may be a first astronomical source of?

	blue rays
	X-rays
	cyan rays
	infrared rays
	protons
	neutrinos

2 Yes or No, HR 4731, α² Cru is an infrared source in the constellation Crux.

	Yes
	No

3 Imaging brown dwarfs involve which of the following:

	far-infrared (submillimeter) observations at 350 microns
	neutrino detection
	heating of the nearby gas and dust
	near-infrared covering 1.3 and 2.2 microns
	infrared covering 4.5 and 8.0 microns

4 Which of the following are radiation astronomy phenomena usually associated with lithium emission?

	a green emission line
	nucleosynthesis
	an orange line at 610.3 nm
	the Spite plateau
	lithium-drifted silicon detectors
	the Fraunhofer E line
	asymptotic supergiant branch
	an infrared line at 812.6 nm

5 True or False, In 1926 there were no national observatories (except the Naval Observatory), very little chance for guest observing elsewhere, no radio astronomy, no X-ray astronomy, no satellite astronomy, and very little infrared or even red astronomy!

	TRUE
	FALSE

6 Complete the text:

Astronomers place the submillimetre waveband between the and wavebands, typically taken to be between a few hundred micrometres and a millimetre.

7 True or False, The Earth's atmosphere does not transmit infrared radiation between 6 and 7 microns in wavelength because of water vapor.

	TRUE
	FALSE

8 Complete the text:

Match up the radiation letter with each of the detector possibilities below:

Meteors - A

Cosmic rays - B

Neutrons - C

Protons - D

Electrons - E

Positrons - F

Neutrinos - G

Muons - H

Gamma rays - I

X-rays - J

Ultraviolet rays - K

Optical rays - L

Visual rays - M

Violet rays - N

Blue rays - O

Cyan rays - P

Green rays - Q

Yellow rays - R

Orange rays - S

Red rays - T

Infrared rays - U

Submillimeter rays - V

Radio rays - W

Superluminal rays - X

multialkali (Na-K-Sb-Cs) photocathode materials .

F547M .

511 keV gamma-ray peak .

F675W .

broad-band filter centered at 404 nm .

a cloud chamber .

ring-imaging Cherenkov .

coherers .

effective area is larger by 104 .

F588N .

pyroelectrics .

a blemish about 8,000 km long .

a metal-mesh achromatic half-wave plate .

coated with lithium fluoride over aluminum .

thallium bromide (TlBr) crystals .

F606W .

aluminum nitride .

heavy water .

18 micrometers FWHM at 490 nm .

wide-gap II-VI semiconductor ZnO doped with Co2+ (Zn1-xCoxO) .

a recoiling nucleus

high-purity germanium .

magnetic deflection to separate out incoming ions .

2.2-kilogauss magnet used to sweep out electrons .

9 Complete the text:

Match up the item letter with each of the possibilities below:

superluminals - A

radios - B

radars - C

microwaves - D

submillimeters - E

infrareds - F

reds - G

oranges - H

deuterium enrichment of cometary water

interstellar-comet connection .

a macroscopic superstring .

force of life .

rings of Saturn .

volcanic activity throughout Vesta .

a silicon composite bolometer fed by a Winston cone .

present-day fluctuations an order of magnitude larger .

10 Complete the text:

Match up the radiation type with the satellite:

meteor - A

cosmic ray - B

neutral atoms - C

neutron - D

proton - E

electron - F

positron - G

neutrino - H

gamma ray - I

X-ray - J

ultraviolet - K

optical - L

visual - M

violet - N

blue - O

cyan - P

green - Q

yellow - R

orange - S

red - T

infrared - U

submillimeter - V

microwave - W

radio - X

radar - Y

superluminal - Z

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11 Complete the text:

Methane possesses prominent in the visible and near-infrared (IR) making aquamarine or in color.

12 Which of the following are phenomena usually associated with fluorine emission?

	fluorine emission lines in the green are relatively weak
	fluorine lines in the near infrared are usually much stronger than the green lines
	F I has lines in the green
	F II has lines in the green
	F III has at least one line in the green
	the Fraunhofer E line

13 True or False, The European Space Agency's Herschel Space Observatory has aboard the Photodetector Array Camera and Spectrometer (PACS) which operates in three bands centred on 70, 100, and 160 μm, respectively.

	TRUE
	FALSE

14 The Spitzer Space Telescope has the following phenomena usually associated with it?

	cryogenically-cooled
	85 cm diameter
	f/12
	lightweight boron
	3 - 180 µm wavelength range
	the Fraunhofer E line

15 Radiation phenomena associated with trigonometric parallax are

	gamma-ray trigonometric parallax distances < 0.4 kpc
	X-ray trigonometric parallax distances good to 2 pc
	ultraviolet trigonometric parallax is good to ± 7 pc
	visual trigonometric parallax distances good to about 3 kpc
	infrared trigonometric parallax with an accuracy of 120 µas
	radio trigonometric parallax distances good at least to 1.86 kpc

Hypotheses

Main article: Hypotheses

1. Questions about infrared stars can touch on any and all wavelengths.

See also

• Astronomy/Quiz
• Green astronomy/Quiz
• Planetary science/Quiz
• Radiation astrochemistry/Quiz
• Radiation astrogeography/Quiz
• Radiation astrohistory/Quiz
• Radiation astronomy/Quiz
• Stars/Quiz

External links

• International Astronomical Union
• NASA/IPAC Extragalactic Database - NED
• NASA's National Space Science Data Center
• The SAO/NASA Astrophysics Data System
• SDSS Quick Look tool: SkyServer
• SIMBAD Astronomical Database
• SIMBAD Web interface, Harvard alternate
• Spacecraft Query at NASA
• Universal coordinate converter

{{Radiation astronomy resources}}