Stars/Yellows/Quiz

Yellow stars is a lecture from the radiation astronomy department for possible inclusion in the course on the principles of radiation astronomy.

Above, the northern section of the Eridanus constellation is delineated in green, while Orion is shown in blue. Below, an enlarged view of the region in the white box shows the location of Epsilon Eridani at the intersection of the two lines. Credit: ESO/Y. Beletsky.

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Quiz

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1 Which of the following emission/absorption phenomena are associated with yellow stars?

	helium lines at 501 and 505 nm
	the strong C2 (1,2) band
	nitrogen emission in plasmas at 566.934 nm from N VIII
	helium emission line at 5876 Å
	neutral iron line at 526.96 nm
	calcium yellow line at 569.4 nm

2 Which of the following is a phenomenon associated with yellow stars?

	Jupiter
	sodium line emission
	sunspots on the Sun
	an emission with a wavelength of 420 nm
	phosphorus
	TiO

3 True or False, The red shift cannot affect yellow stars.

	TRUE
	FALSE

4 Complete the text:

A filter of type F588N allows the transmission of rays.

5 Which of the following emission/absorption phenomena are associated with yellow stars?

	Nitrogen emission line at 575.5 nm
	the strong C2 (1,2) band
	nitrogen emission in plasmas at 566.934 nm from N VIII
	Helium emission line at 5876 Å
	neutral iron line at 526.96 nm
	Calcium yellow line at 569.4 nm

6 Which of the following is not a prominent feature associated with the yellowness response?

	M cone cells
	a green light source
	L cones
	"bluish green" 493-498 nm
	"yellowish green" 530-559 nm
	"yellow green" 559-570 nm

7 True or False, Bremsstrahlung radiation may be a source of the yellow continuum.

	TRUE
	FALSE

8 Which of the following are likely associated with a yellow emission line control group?

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

9 Using the equation ${\frac {c2}{\lambda T}}{\frac {1}{e^{\frac {c2}{\lambda T}}-1}}e^{\frac {c2}{\lambda T}}-5=0$ what temperature corresponds approximately to a Planckian peak wavelength of 580 nm?

	5140 K
	5800 K
	5170 K
	6000 K
	5870 K
	5250 K

10 Which of the following are the differences between a star and an astronomical yellow source?

	a star may emit predominantly green rays
	an astronomical yellow source is spherical
	a yellow star is an astronomical yellow source
	a star with nuclear fusion in its chromosphere emits neutrinos, but a yellow source with no nuclear fusion ongoing does not
	a yellow source may be cloud like
	an astronomical yellow source may be a rocky object

Hypotheses

Main article: Hypotheses

1. Yellow stars allow the study all the astronomical objects of the Solar System.

See also

• First astronomical X-ray source/Quiz
• Planetary science/Quiz
• Radiation astronomy/Quiz
• Radiation chemistry/Quiz
• Radiation geography/Quiz
• Radiation history/Quiz
• Stellar active region/Quiz

External links

• NASA/IPAC Extragalactic Database - NED
• The SAO/NASA Astrophysics Data System
• SIMBAD Astronomical Database

{{History of science resources}}{{Principles of radiation astronomy}}{{Radiation astronomy resources}}