21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
6th Edition
ISBN: 9780393874921
Author: PALEN
Publisher: Norton, W. W. & Company, Inc.
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Chapter 7, Problem 5QP
To determine
Select the correct option for detects of the spectroscopic radial velocity method.
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19 A planet is detected via the Doppler technique. The velocity change of the star is a measure of
A The planet's size and density.
B
C
D
E
The planet's mass and orbital distance.
The planet's orbital period and eccentricity.
The planet's mass and composition.
The planet's size and orbital distance.
H5.
A star with mass 1.05 M has a luminosity of 4.49 × 1026 W and effective temperature of 5700 K. It dims to 4.42 × 1026 W every 1.39 Earth days due to a transiting exoplanet. The duration of the transit reveals that the exoplanet orbits at a distance of 0.0617 AU. Based on this information, calculate the radius of the planet (expressed in Jupiter radii) and the minimum inclination of its orbit to our line of sight.
Follow up observations of the star in part reveal that a spectral feature with a rest wavelength of 656 nm is redshifted by 1.41×10−3 nm with the same period as the observed transit. Assuming a circular orbit what can be inferred about the planet’s mass (expressed in Jupiter masses)?
Which of the following observations would support the solar nebula theory over the passing star hypothesis?
a.
Proving that most of the sun-like stars near the sun also have planets orbiting them.
b.
Proving that none of the stars near the sun has planets orbiting them.
c.
Finding a planet located beyond the orbit of Pluto.
d.
Finding a meteorite whose age proved to be greater than 4.6 billion years.
e.
Proving that Mercury has the same uncompressed density as Earth.
Chapter 7 Solutions
21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
Ch. 7.1 - Prob. 7.1CYUCh. 7.2 - Prob. 7.2CYUCh. 7.3 - Prob. 7.3CYUCh. 7.4 - Prob. 7.4CYUCh. 7.5 - Prob. 7.5CYUCh. 7 - Prob. 1QPCh. 7 - Prob. 2QPCh. 7 - Prob. 3QPCh. 7 - Prob. 4QPCh. 7 - Prob. 5QP
Ch. 7 - Prob. 6QPCh. 7 - Prob. 7QPCh. 7 - Prob. 8QPCh. 7 - Prob. 9QPCh. 7 - Prob. 10QPCh. 7 - Prob. 11QPCh. 7 - Prob. 12QPCh. 7 - Prob. 13QPCh. 7 - Prob. 14QPCh. 7 - Prob. 15QPCh. 7 - Prob. 16QPCh. 7 - Prob. 17QPCh. 7 - Prob. 18QPCh. 7 - Prob. 19QPCh. 7 - Prob. 20QPCh. 7 - Prob. 21QPCh. 7 - Prob. 22QPCh. 7 - Prob. 23QPCh. 7 - Prob. 24QPCh. 7 - Prob. 25QPCh. 7 - Prob. 26QPCh. 7 - Prob. 27QPCh. 7 - Prob. 28QPCh. 7 - Prob. 29QPCh. 7 - Prob. 30QPCh. 7 - Prob. 31QPCh. 7 - Prob. 32QPCh. 7 - Prob. 33QPCh. 7 - Prob. 34QPCh. 7 - Prob. 35QPCh. 7 - Prob. 36QPCh. 7 - Prob. 37QPCh. 7 - Prob. 38QPCh. 7 - Prob. 39QPCh. 7 - Prob. 40QPCh. 7 - Prob. 41QPCh. 7 - Prob. 42QPCh. 7 - Prob. 43QPCh. 7 - Prob. 44QPCh. 7 - Prob. 45QP
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- 7. Why does a solar nebula flatten into a disk instead of a sphere, even though the gravity of a nebula pulls in all directions?arrow_forward#16arrow_forwardWhich of the following statements is correct? a. The formation of planets stopped because the solar nebula got cooler c. The formation of planets stopped because the solar nebula ran out of planetesimals d. The formation of planets stopped because the solar nebula spinning was slowing down e. The formation of planets stopped because the young Sun's strong solar wind swept away material not yet accreted onto the planetsarrow_forward
- 20 Approximately how many other planetary systems have been discovered to date? A Tens of thousands B) Tens C Hundreds D Thousands E Millionsarrow_forwardDoppler shift lets you see a star move back and forth. look larger and smaller. look bluer and redder-but the shift is extremely small and is visible only if is moving towards and away from you, so it only works from certain viewing angles. O look brighter and dimmer. O The Doppler shift brightens up a dim planet so you can see it.arrow_forwardGMm F, r2 F(r = R) The surface gravity g of a body is. The acceleration due to gravity that an object m would feel on the surface of the body. A. Show that the surface gravity of Earth is ge = 9.8 m/s². B. Determine the surface gravity of the Sun. C. Determine the surface gravity of the Sun when it becomes a red giant star, assuming RG 1 AU. Use this answer to explain the significant mass loss rates observed in these objects.arrow_forward
- Time From this light curve, we can deduce that... O the star has a high mass exoplanet orbiting it O the star has an exoplanet orbiting it that has an eccentric orbit O the star has an exoplanet orbiting it that has an eccentric orbit O the star has an exoplanet that is not on the same orbital plane as the star L Brightnessarrow_forwardStars that contract the quickest to land on the zero-age main sequence on the H–R diagram a. are the most massive. b. are the least massive. c. are neither the most massive nor the least massive. d. all stars contract at the same rate. e. stars similar in mass to the sun.arrow_forwardWhy are we unlikely to find Earth-like planets around halo stars in the Galaxy? A. Halo stars formed in a different way from disk stars. B. Planets around stars are known to be extremely rare. C. Halo stars formed in an environment where there were few heavy elements to create rocky planets. D. Halo stars do not have enough mass to hold onto planets. Is the answer C? Since halo stars are formed early when the galaxy consisted of mainly hydrogen and helium, there are no heavier elements available to create Earth-like planets so just halo stars are formed? Thanks!arrow_forward
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