Two stars—A and B, with absolute magnitudes 3 and 8, respectively—are observed to have the same...
Two stars—A and B, with absolute magnitudes 3 and 8, respectively—are observed to have the same apparent magnitude. Which star is more distant, and how much farther away is it than the other?
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Two stars—A and B, with absolute magnitudes 3 and 8, respectively—are observed to have the same...
Suppose that two identical stars (they have the same total light output) are located so that...
Suppose that two identical stars (they have the same total light output) are located so that star A is at a distance of 5 pc and star B is at a distance of 25 pc from Earth. How will star B appear, compared with star A? A star is at such a distance that its apparent magnitude (m) is 10 magnitudes fainter than its absolute magnitude (M). How far away is it? Three stars have the following apparent (m) and...
What is the reason for two stars to have the same brightness but one being 100...
What is the reason for two stars to have the same brightness but one being 100 times more luminous than the other? One of them is 100 times more distant One of them is 10 times more distant One of them is 1000 times more distant One of them is 4π times more distant The Brightness scale like the inverse of the square of the distance (1/R2) T F What is parallax? The distance of a star A method to...
Warm Up One of the most reliable ways to detect planets orbiting other stars is to look for regular dips in the star...
Warm Up One of the most reliable ways to detect planets orbiting other stars is to look for regular dips in the stars apparent magnitude (brightness). KIC 3558849 is a star of roughly the EPIC 26103150, Ko-11.782 Lst 90009 same mass and radius as our Sun Dips are observed in its brightness every 1322 days. How far away from. 100 the center of KIC 3558849 is this 0 9980 planet orbiting?
Warm Up One of the most reliable ways to...
Which of the following statements is true? O A. Stars that are further away always appear more dim than closer stars. B...
Which of the following statements is true? O A. Stars that are further away always appear more dim than closer stars. B. The luminosity ('intrinsic brightness") of stars decreases with distance from the observer. C. The "colour" of a star is related to its distance. 0 D. The difference between the measured ("apparent") brightness of a star and its intrinsic brightness allows you to calculate its distance. Reset Selection
Which of the following statements is true? O A. Stars that...
The characteristic absorption spectra of two stars are shown. Indicated in each is a set of absor...
The characteristic absorption spectra of two stars are shown.
Indicated in each is a set of absorption lines due to interstellar
material between us and the stars. Using this information and the
spectral drawings shown below complete parts a - e of this
question.
a. The interstellar absorption lines appear more intense in the
spectrum of star A than star B. What does this mean in terms of the
number of absorbing atoms between the earth observer's line of
sight...
3. If vectors A and B have magnitudes 12 and 15, respectively, and the angle between...
3. If vectors A and B have magnitudes 12 and 15, respectively, and the angle between the two when they are drawn starting from the same point is 110°, what is the scalar product of these two vectors? 4. To vectors A and Bare given by A = 51+6/t7k and B-31-8j +2k. If these two vectors are drawn st the same point, what is the angle between them?
Consider two stars emitting like blackbodies. Suppose Star Ben is twice as hot as Star Jerry....
Consider two stars emitting like blackbodies. Suppose Star Ben is twice as hot as Star Jerry. Which one of the following statements is not necessarily true? (a) Star Ben’s spectrum peaks at a wavelength half that of Star Jerry’s spectrum. (b) Star Ben is more lumi-nous than Star Jerry. (c) The two stars have the same value for the product of their surface temperature and the wavelength at which their spectrum peaks. (d) Star Ben emits more total energy per...
Could one of the stars listed in the table above be an RR Lyrae star?
Cosmic DistancesDISTANCE MODULUS- For this lab, we will focus on two techniques that can be used to measure the distance modulus of objects in deep space - supernovas and Cepheid variable stars. Before we begin, though, we must understand what "distance modulus" means.- Read through the background material on distance modulus.- Use the distance modulus page to complete the following table:ObjectApparent Magnitude (m)Absolute Magnitude (M)Distance Modulus (m-M)Distance (pc)Star A2.410Star B516Star C1025Star D8.50.5- Could one of the stars listed in the...
If vectors A and B have magnitudes 12 and 15, respectively, and the angle between the...
If vectors A and B have magnitudes 12 and 15, respectively, and the angle between the two when they are drawn starting from the same point is 110 degree, what is the scalar product of these two vectors? a. -76 b. -62 c. -90 d. -47 e. -170
2) Densities We discussed White Dwarfs and Neutron stars, very dense objects compared to stars like...
2) Densities We discussed White Dwarfs and Neutron stars, very dense objects compared to stars like our sun. On the other hand, we also discussed Red Giants which are much less dense than our sun. To realize just how dense, please compute the average densities (in kg/m) for a) the sun (Rsun=7 x 10 km, Msun= 2 x 1030 kg) b) when the sun becomes a red giant (R= 1AU, M=Msun). By what factor is a Red Giant less dense...
Warm Up One of the most reliable ways to detect planets orbiting other stars is to look for regular dips in the stars apparent magnitude (brightness). KIC 3558849 is a star of roughly the EPIC 26103150, Ko-11.782 Lst 90009 same mass and radius as our Sun Dips are observed in its brightness every 1322 days. How far away from. 100 the center of KIC 3558849 is this 0 9980 planet orbiting?
Warm Up One of the most reliable ways to...
Which of the following statements is true? O A. Stars that are further away always appear more dim than closer stars. B. The luminosity ('intrinsic brightness") of stars decreases with distance from the observer. C. The "colour" of a star is related to its distance. 0 D. The difference between the measured ("apparent") brightness of a star and its intrinsic brightness allows you to calculate its distance. Reset Selection
Which of the following statements is true? O A. Stars that...
The characteristic absorption spectra of two stars are shown.
Indicated in each is a set of absorption lines due to interstellar
material between us and the stars. Using this information and the
spectral drawings shown below complete parts a - e of this
question.
a. The interstellar absorption lines appear more intense in the
spectrum of star A than star B. What does this mean in terms of the
number of absorbing atoms between the earth observer's line of
sight...
3. If vectors A and B have magnitudes 12 and 15, respectively, and the angle between the two when they are drawn starting from the same point is 110°, what is the scalar product of these two vectors? 4. To vectors A and Bare given by A = 51+6/t7k and B-31-8j +2k. If these two vectors are drawn st the same point, what is the angle between them?
If vectors A and B have magnitudes 12 and 15, respectively, and the angle between the two when they are drawn starting from the same point is 110 degree, what is the scalar product of these two vectors? a. -76 b. -62 c. -90 d. -47 e. -170
2) Densities We discussed White Dwarfs and Neutron stars, very dense objects compared to stars like our sun. On the other hand, we also discussed Red Giants which are much less dense than our sun. To realize just how dense, please compute the average densities (in kg/m) for a) the sun (Rsun=7 x 10 km, Msun= 2 x 1030 kg) b) when the sun becomes a red giant (R= 1AU, M=Msun). By what factor is a Red Giant less dense...
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