Cosmic Perspective Fundamentals
3rd Edition
ISBN: 9780134988504
Author: Bennett, Jeffrey O., Donahue, M. (megan), SCHNEIDER, Nicholas, Voit, Mark
Publisher: Pearson,
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Chapter 9, Problem 2QQ
To determine
The star which has the hottest core.
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a) Sketch a generic HR diagram, including labels for the
axes. (Take a picture or scan your work and upload it as
a separate file.)
b) Consider the following three stars, place them on your
HR diagram and determine their rough spectral type and
class of star. Also calculate their size relative to the Sun.
I) L = 0.001 Lsun T = 3000~K
II) L = 20,000 Lsun T = 4000K
III) L = 0.001 Lsun T = 15,000K
For this question, CHOOSE THE CORRECT ANSWER, then explain your reasoning in the RATIONALE section below: Alpha, Beta-plus, Beta-minus and Gamma decay are all different forms of radio-Active decay. A certain radio-isotope emits ONE alpha particle, and its products then emit TWO beta-minus particles in succession. The atomic number of the final resulting nucleus will now change (as compared to your starting nucleus) by
A. zero
B. minus 1
C. minus 2
D. minus 3
Please do not give solution in image formate thanku
Q:
You’ve just discovered another new X-ray binary, which we will call Hyp-X2 (“Hyp” for hypothetical). The system Hyp-X2 contains a bright, G2 main-sequence star orbiting an unseen companion. The separation of the stars is estimated to be 12 million kilometers, and the orbital period of the visible star is 5 days.
Use Newton’s version of Kepler’s third law to calculate the sum of the masses of the two stars in the system.
a)Express your answer in kilograms to two significant figures.
b) Give your answer from the previous part in solar masses. ( Msun= 2.0 x 10 /30 kg). Express your answer as a multiple of sun’s mass to two significant figures.
C) Determine the mass of the unseen companion. ( Hint: A G2 main-sequence star has a mass of 1 Msun.) Express your answer as a multiple of sun’s mass to two significant figures.
The previous answer was not correct, please help me
Chapter 9 Solutions
Cosmic Perspective Fundamentals
Ch. 9 - Choose the best answer to each of the following....Ch. 9 - Prob. 2QQCh. 9 - Prob. 3QQCh. 9 - Prob. 4QQCh. 9 - Choose the best answer to each of the following....Ch. 9 - Choose the best answer to each of the following....Ch. 9 - Choose the best answer to each of the following....Ch. 9 - Choose the best answer to each of the following....Ch. 9 - Choose the best answer to each of the following....Ch. 9 - Choose the best answer to each of the following....
Ch. 9 - Choose the best answer to each of the following....Ch. 9 - Choose the best answer to each of the following....Ch. 9 - Explain all answers clearly, with complete...Ch. 9 - Explain all answers clearly, with complete...Ch. 9 - Explain all answers clearly, with complete...Ch. 9 - Prob. 16SEQCh. 9 - Explain all answers clearly, with complete...Ch. 9 - Explain all answers clearly, with complete...
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- Analyze the multi-wavelength images below and answer the few questions that follows up : 1. Where do you see the higher energy phenomena? What are they? Are they visible in any image? Why?2. Where are the young stars? What colour do they have? Are they visible in any image? Why?3. Where are the old stars? What colour do they have? Are they visible in any image? Why?arrow_forwarda) The star 58 Eridani is a feint but naked-eye star similar to the Sun. Suppose that you are observing this star in the night sky without a telescope. Ignoring any interstellar extinction or atmospheric absorption, approximately how many photons per second arrive at your retina? Show all steps in your calculation. Look up any required information about the star using Wikipedia. Use sensible approximations so your calculation is straightforward. For example you could consider only the region of the spectrum where the photon flux peaks. b) The Mid-Infrared Instrument (MIRI, camera and spectrograph) on the James Webb Space Telescope operates in the band 5 – 28 µm. For 58 Eridani, approximately how many photons per second can be used by this instrument? Assume that MIRI takes all the photons from the full JWST mirror. Show all steps in your calculation. Describe briefly two or three other factors which play a role in determining the sensitivity of an instrument such as MIRI?arrow_forwardThe time it takes for a cloud 106,000 AU in radius to collapse in "free-tall to form a new star is half the time it would take for an object to orbit the star on an extremely elliptical orbit with a semimajor axis of 53,000 AU (half the 106.000 AU radius). Part A Use Kepler's third law to find the collapse time, assuming the star has the same mass as the Sun. Express your answer in years to two significant figures. VE ΑΣΦΑ t= Submit Provide Feedback Request Answer yearsarrow_forward
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