The most easily observed white dwarf in the sky is in the constellation of Eridanus (the...

The most easily observed white dwarf in the sky is in the constellation of Eridanus (the Rover Eridanus). Three stars make up the 40 Eridani system: 40 Eri A is a 4th-magnitude star similar to the Sun; 40 Eri B is a 10th-magnitude white dwarf; and 40 Eri C is an 11th-magnitude red M5 star. This problem deals only with the latter two stars, which are separated from 40 Eri A by 400 AU.

c) The effective temperature of 40 Eri B is 16900 K. Calculate its radius, and compare your answer to the radii of the Sun, Earth, and Sirius B.

d) Calculate the average density of 40 Eri B, and compare your result with the average density of Sirius B. Which is more dense, and why?

e) Calculate the product of the mass and volume of both 40 Eri B and Sirius B. Is there a departure from the mass-volume relation? What might be the cause?

Please clearly show me the answers to this question, with clear explanation and procedure! Thanks!

Solutions

Expert Solution

I hope you understood the problem, If yes rate me!! or else comment for a better solution.

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

1. Which of the following would not be observed if you observed the sky without a...

1. Which of the following would not be observed if you observed the sky without a telescope? (More than one answer can be correct). Venus moves relative to the Sun. Mars moves relative to the stars. The starts rotate about a single point in the sky. The stars move relative to each other. The Moon moves relative to the stars. 2.Comparing theories by Ptolemy and by Copernicus. (More than one answer may be correct) Both could explain retrograde motion Copernicus'...

There are two kinds of white dwarf stars. For each kind, explain the type of object...

There are two kinds of white dwarf stars. For each kind, explain the type of object it comes from and what it is made of, and how it is formed.

Calculate the surface redshift due to gravity for both the white dwarf and neutron star.

Tell the life story of a 0.8Msun white dwarf from its humble beginnings as a main...

Tell the life story of a 0.8Msun white dwarf from its humble beginnings as a main sequence star to its end as a white dwarf.

In a white dwarf star what prevents the total collapse due to gravity? Group of answer...

In a white dwarf star what prevents the total collapse due to gravity? Group of answer choices a) Electron degeneracy pressure in the white dwarf prevents further collapse of the star due to gravity. b) Fusion at the core provides the energy to counter gravity. c) Burning of the carbon oxygen core leads to energy output responsible for balancing gravity d) Kelvin-Helmholtz contraction leads to the outward flow of energy that is responsible for stalling gravity e) Neutron degeneracy pressure...

A neutron star and a white dwarf have been found orbiting each other with a period...

A neutron star and a white dwarf have been found orbiting each other with a period of 26 minutes. If their masses are typical, what is their average separation? Compare the separation with the radius of the sun, 7 ✕ 105 km. (Hints: Use the version of Kepler's third law for binary stars, MA + MB = a3 P2 ; make sure you express quantities in units of AU, solar masses, and years. Assume the mass of the neutron star...

Provide some definitions and descriptions of the following objects with diagrams if necessary 1. White dwarf...

Provide some definitions and descriptions of the following objects with diagrams if necessary 1. White dwarf 2. Rotational Curve 3. HII region 4. Virial Theorem 5. Chandrasekar mass 6. Critical cosmological density 7. Gravitational wave 8. Clusters of galaxies

In your own words, describe the evolution of the Sun (from interstellar cloud to white dwarf)....

In your own words, describe the evolution of the Sun (from interstellar cloud to white dwarf). A H-R diagram must be drawn, and key aspects must be described in detail. You may write your answer in point form.

Explain why a) the sky is blue, b) clouds are white, and c) the underside of...

Explain why a) the sky is blue, b) clouds are white, and c) the underside of clouds sometimes looks gray.

A type-Ia supernova may be the thermonuclear explosion of an accreting white dwarf that approaches the Chandresekhar limit.

A type-Ia supernova may be the thermonuclear explosion of an accreting white dwarf that approaches the Chandresekhar limit. An alternative scenario, however, is that supernova Ia progenitors are white-dwarf binaries that lose orbital energy to gravitational waves until they merge, and thus exceed the Chandrasekhar mass and explode. a) Show that the oribtal kinetic energy of an equal-mass binary with seperation a and individual masses M is E_{k}=\frac{GM^{2}}{2a} and the total orbital energy (kinetic plus gravitational) is minus this...

Subjects