« previous next »

Author Question: Explain why the Crab Nebula cannot involve a rapidly rotating white dwarf star. What will be an ... (Read 65 times)

ishan

  • Hero Member
  • *****
  • Posts: 546
on: Jul 27, 2018
Explain why the Crab Nebula cannot involve a rapidly rotating white dwarf star.
 
  What will be an ideal response?

Question 2

The diffraction-limited resolution of a 10-meter telescope is about 0.01 arcsecond for visible light.
 
  Would you expect the actual angular resolution of a Keck 10-meter telescope in Hawaii to be better than, equal to, or worse than 0.01 arcsecond? Explain.


huda

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jul 27, 2018
Answer to Question 1

The pulsar in the Crab Nebula rotates 30 times a second. A white dwarf rotating this quickly will literally fly apart, its gravity unable to withstand the enormous effects of rotation.

Answer to Question 2

It would be worse than 0.01 arcsecond because of the distortion caused by atmospheric turbulence.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Grey matter and white matter in the CNS. Grey matter and white matter in the CNS.
Welcome sign for Kenton, Tennessee, an example of competition for "White Squirrel Capital" Welcome sign for Kenton, Tennessee, an example of competition for "White Squirrel Capital"
For a differential white blood cell count, (A) the slide is examined under oil immersion. (B) Cells ... For a differential white blood cell count, (A) the slide is examined under oil immersion. (B) Cells ...
One of the cultural privileges of being white in the United States is less suspicion of wrongdoing. One of the cultural privileges of being white in the United States is less suspicion of wrongdoing.
Rapidly decreasing sequence costs have enabled the rapid expansion Rapidly decreasing sequence costs have enabled the rapid expansion
Video: Muscle cell structures - actin, myosin and titin filaments

For a complete list of videos, visit our video library