An eclipsing binary will a.be more luminous than a visual binary. b.always be a spectroscopic binary. c.give off most of its light in the infrared. d.show a constant Doppler shift in its spectral lines. e.show two stars with variable proper motion.

In a binary star system, the two stars rotate about a common center of mass. This common center of…

Answered: An eclipsing binary will a. be more…

Similar questions

A helium flash occurs a. because helium is very explosive and cannot be controlled when the nuclear reactions occur. b. because degenerate electrons in the core do not allow the core to expand as it heats up. c. in Cepheid variables. d. in stars with masses less than 0.4 M. e. under none of the above conditions.
Once carbon builds up in the Sun's core, astronomers expect our Sun to first become a red giant, then a .. Select one: A. neutron star B. red dwarf C. planetary nebula D. black hole E. pulsar
Which of the following stars are bright and very cool. A. White dwarfs B. Our sun C. Giants
Which type of star would be the largest? a. M b. O c. B d. K e. A
57. Solar Power Collectors. This problem leads you through the calculation and discussion of how much solar power can in principle be collected by solar cells on Earth. a. Imagine a giant sphere with a radius of 1 AU surrounding the Sun. What is the surface area of this sphere, in square meters? (Hint: The formula for the surface area of a sphere is 4rr2.) b. Because this imaginary giant sphere surrounds the Sun, the Sun's entire luminosity of 3.8 × 1020 watts must pass through it. Calculate the power passing through each square meter of this imaginary sphere in watts per square meter. Explain why this number represents the maximum power per square meter that a solar collector in Earth orbit can collect. c. List several reasons why the average power per square meter collected by a solar collector on the ground will always be less than what you found in part b. d. Suppose you want to put a solar collector on your roof. If you want to optimize the amount of power you can collect, how…
The star Firefly is located 3.0 pc away. If it had an absolute magnitude of 13.0, which value below is reasonable for its apparent magnitude? O A. 10.4 ОВ. 13.3 ОС. -26.7 O D. 15.0
A. Based on the graph, what is the approximate mean luminosity of a Cepheid variable star with a period of 5 days? 10 days?
5. The approximate relationship between the luminosity and the period of Cepheid variables is Lstar[in units Lsun] = 335 P [in units days]. Delta Cephei has a cycle period of 5.4 days and a parallax of 0.0033 arcseconds. A second Cepheid appears 1/1000 times as bright and has a period of 54days. How far away (in parsecs) is the second more distant Cepheid?
Which of the following WOULD NOT characterizes the type(s) of star we would find at g, m, n, o, and p on the Hertzsprung-Russel Diagram (Figure 4) a. are all smaller than q,i,h. b. fuse hydrogen into helium. c. are called, “the main sequence”. d. fuse He into heavier elements. e. get smaller towards the right side
Black holes are formed by A. collapsed dark nebulae. B. supernovae from binary stars. C. a lack of any light in a region of space. D. supernovae from the most massive stars.
You discover a binary star system in which one member is a 15 solar-mass main-sequence star and the other star is a 10 solar-mass giant. Why should you be surprised, at least at first? A. It doesn't make sense to find a giant in a binary star system. B. The two stars in a binary system should both be at the same point in stellar evolution; that is, they should either both be main-sequence stars or both be giants. C. The two stars should be the same age, so the more massive one should have become a giant first. D. The odds of ever finding two such massive stars in the same binary system are so small as to make it inconceivable that such a system could be discovered. E. A star with a mass of 15 solar-mass is too big to be a main-sequence star.
Stars A and B both have the same spectral class. Star A is 7 times farther away than star B. The brightness of star A will be ________ times dimmer than B. a. 100 b. 14 c. 7 d. 49 e. 10

SEE MORE QUESTIONS

	a.	be more luminous than a visual binary.
	b.	always be a spectroscopic binary.
	c.	give off most of its light in the infrared.
	d.	show a constant Doppler shift in its spectral lines.
	e.	show two stars with variable proper motion.

An eclipsing binary will a. be more luminous than a visual binary. b. always be a spectroscopic binary. c. give off most of its light in the infrared. d. show a constant Doppler shift in its spectral lines. e. show two stars with variable proper motion.