Solved Cepheid variable stars vary because a. they | Chegg.com
Cepheid variable stars are main sequence stars. True. False. 2 points . QUESTION 4. Cepheid variable stars can be used to measure distance to galaxies. True. False. 2 points . QUESTION 5. In order to determine whether or not a star is a Cepheid variable I …
Solved Exercise 1: Finding a Cepheid variable star Before we - Chegg
Question: Exercise 1: Finding a Cepheid variable star Before we can use Cepheids to measure the distance to Andromeda, we first need to find one of these stars inside that galaxy. This is tricky: when we take a single image with a telescope, Cepheids look just like any other star.
Solved A Cepheid variable star is yellowish supergiant whose
A Cepheid variable star is yellowish supergiant whose brightness varies in a periodic way, over and over, as time passes. As it turns out, the period (or cycle duration) is an important tool for measuring the size and age of the universe.
Solved Cepheid variable stars are useful for determining - Chegg
Question: Cepheid variable stars are useful for determining distances to galaxies because the period of their variation is related to their a. luminosity b. chemical composition c. size d. temperature
Solved A Cepheid variable star is a star whose brightness - Chegg
A Cepheid variable star is a star whose brightness alternately increases and decreases. Suppose that Cephei Joe is a star for which the interval between times of maximum brightness is 4.7 days. Its average brightness is 2.1 and the brightness changes by +1-0.25.
Solved Using the Cepheid variable light curve below we will - Chegg
Question: Using the Cepheid variable light curve below we will determine the distance to this Population I star DX Gem Period-Luminosity 0.9 0.8 Relative Luminosity 5 C Period (Days) What is the period of this variable star? days/cycle The measured apparent magnitude for …
Solved The period of a variable star in a galaxy is measured - Chegg
Is it a Cepheid variable star? No, because Cepheid variables are only found in the constellation of Cepheus No, because the time it takes to brighten is not the same as the time it takes for it to dim Yes, because it brightens in one-third the time and dims in two-thirds the time Yes, because all variable stars are also called Cepheid variables.
Solved A Cepheid variable star has a measured pulsation - Chegg
A Cepheid variable star has a measured pulsation period of 13.6 days, and its continuum spectrum peaks at 517 nm (to 3 s.f.).Showing all your working, calculate its radius, in units of solar radii. You should assume that the Sun's absolute magnitude is …
Solved Below is the light curve of Cepheid variable star ... - Chegg
Light curve of Cepheid variable star V1 in galaxy M31 00 Brightness Jul. '10 Aug. '10 Sep, '10 Oct. '10 Nov. '10 Dec. 10 Jan. '11 Not the question you’re looking for? Post any question and get expert help quickly.
Solved Cepheid Variable Stars - The brightness of a star as - Chegg
Question: Cepheid Variable Stars - The brightness of a star as seen from Earth is measured by the . The is an intrinsic property of the star (its "wattage"). For Cepheid variable stars, this is related to the star's - According to the graph below, has the highest luminosity. - According to the graph below, has a larger apparent magnitude.