« previous next »

Author Question: Explain why the Crab Nebula cannot involve a rapidly rotating white dwarf star. What will be an ... (Read 70 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?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

White Lion - Bratislava Zoo, Slovakia. White Lion - Bratislava Zoo, Slovakia.
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation. Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.
Crab Crab
Buffy Helmetcrest and White-bearded Helmetcrest Buffy Helmetcrest and White-bearded Helmetcrest
All living apes possess rotating, suspensory shoulders, including humans. All living apes possess rotating, suspensory shoulders, including humans.
Video: Erythropoietin (EPO)

For a complete list of videos, visit our video library