White Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and its density is about 2 x 106 g/cm?. Find the radius of the white dwarf in km to three significant digits. (Hint: Density = mass/volume, and the volume of a4sphere is Tr.)3kmCompare your answer with the radii of the planets listed in the Table A-10. Which planet is this white dwarf is closely equal to in size?I Table A-10 I Properties of the PlanetsORBITAL PROPERTIESSemimajor Axis (a)Orbital Period (P)Average OrbitalVelocity (km/s)OrbitalInclinationPlanet(AU)(106 km)(v)(days)Eccentricityto EclipticMercury0.38757.90.24188.047.90.2067.0°Venus0.7231080.615224.735.00.0073.4°Earth1.001501.00365.329.80.017Mars1.522281.88687.024.10.0931.8°Jupiter5.2077911.9433213.10.0491.30Saturn9.58143329.510,7599.70.0562.5°30,79960,190Uranus19.23287784.36.80.0440.8°Neptune* By definition.30.104503164.85.40.0111.8°PHYSICAL PROPERTIES (Earth = e)SurfaceGravity(O = 1)SiderealInclinationAverageDensity(g/cm)EscapeVelocity(km/s)Equatorial RadiusMassPeriod ofof Equatorto OrbitPlanet(km)(O = 1)(O = 1)RotationMercury24400.3830.0555.430.384.258.6d0.0°Venus60520.9500.8155.200.9010.5243.0d177.3°Earth63781.001.0005.521.0011.223.93h23.4°Mars33960.5330.1073.930.385.024.62h25.2°Jupiter71,49211.213181.332.5359.59.92h3.1°Saturn60,2689.4595.20.691.0635.510.57h26.7°Uranus25,5594.0114.51.270.8921.317.24h97.8°Neptune24,7643.8817.11.641.1423.516.11h28.3°

It is given that, M=0.98 solar mass=0.98×1.989×1030 kg=1.95×1030 kgρ=2×106 g/cm3=2×106×103…

White Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and its density is about 2 x 106 g/cm3. Find the radius of the white dwarf in km to three significant digits. (Hint: Density - mass/volume, and the volume of a sphere is r.) km Compare your answer with the radii of the planets listed in the Table A-10. Which planet is this white dwarf is closely equal to in size?

White Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and its density is about 2 x 106 g/cm3. Find the radius of the white dwarf in km to three significant digits. (Hint: Density - mass/volume, and the volume of a sphere is r.) km Compare your answer with the radii of the planets listed in the Table A-10. Which planet is this white dwarf is closely equal to in size?

Stars and Galaxies (MindTap Course List)

10th Edition

ISBN:9781337399944

Author:Michael A. Seeds

Publisher:Michael A. Seeds

Chapter14: Neutron Stars And Black Holes

Section: Chapter Questions

Problem 12P

See similar textbooks

Similar questions

What is the average density of a neutron star that has the same mass as the sun but a radius of only 49.665 km? (Pls state the answer in the proper SI unit and without scientific notation)
what is the answer for sub-item (b) if the radius of the neutron star is 90.651 km? (express your answer in the proper SI unit and without scientific notation)
Trappist-1 is a star that has been found to be orbited by seven Earth-like planets. From the most massive of these, Trappist-1c, the star has apparent brightness of about 3,002 W/m2. What is the brightness of the star as seen from Trappist-1g, which is 3 times farther away? W/m2
Would you expect to find any white dwarfs in the Orion Nebula? (See The Birth of Stars and the Discovery of Planets outside the Solar System to remind yourself of its characteristics.) Why or why not?
If a transit depth of 0.00001 can be detected with the Kepler spacecraft, what is the smallest planet that could be detected around a 0.3 RsunM dwarf star?
When astronomers found the first giant planets with orbits of only a few days, they did not know whether those planets were gaseous and liquid like Jupiter or rocky like Mercury. The observations of HD 209458 settled this question because observations of the transit of the star by this planet made it possible to determine the radius of the planet. Use the data given in the text to estimate the density of this planet, and then use that information to explain why it must be a gas giant.
If the Orion Nebula is 8 pc in diameter and has a density of about 6.0 108 hydrogen atoms/m3, what is its total mass? (Notes: The volume of a sphere is 43r3; 1 pc = 3.1 1016 m; the mass of a hydrogen atom is 1.7 1027 kg.)
The best parallaxes obtained with Hipparcos have an accuracy of 0.001 arcsec. If you want to measure the distance to a star with an accuracy of 10%, its parallax must be 10 times larger than the typical error. How far away can you obtain a distance that is accurate to 10% with Hipparcos data? The disk of our Galaxy is 100,000 light-years in diameter. What fraction of the diameter of the Galaxy’s disk is the distance for which we can measure accurate parallaxes?
What is the escape velocity (in km/s) from the surface of a 1.5 M neutron star? From a 3.0 M neutron star? (Hint: Use the formula for escape velocity, Ve = 2GM r ; make sure to express quantities in units of meters, kilograms, and seconds. Assume a neutron star has a radius of 11 km and assume the mass of the Sun is 1.99 ✕ 1030 kg.) 1.5 M neutron star km/s3.0 M neutron star km/s
What is the average density of a neutron star that has the same mass as the sun but a radius of only 79.878 km? (express your answer in the proper SI unit and without scientific notation)
what is the answer for sub-item (b) if the radius of the neutron star is 78.795 km? (please express your answer in the proper SI unit and without scientific notation)