This topic contains a solution. Click here to go to the answer

Author Question: Describe interstellar reddening. What will be an ideal ... (Read 119 times)

ashley

  • Hero Member
  • *****
  • Posts: 584
Describe interstellar reddening.
 
  What will be an ideal response?

Question 2

Briefly explain T Tauri stars.
 
  Indicate whether the statement is true or false



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

aruss1303

  • Sr. Member
  • ****
  • Posts: 314
Answer to Question 1

If a cloud is less dense, the starlight may be able to penetrate it, and stars can be seen through the cloud; but the stars appear dimmer because the dust in the cloud scatters some of the light. Because shorter wavelengths are scattered more easily than longer wavelengths, the redder photons are more likely to make it through the cloud, and the stars appear redder than they should for their respective spectral types. This effect is called interstellar reddening. The same physical process makes the setting Sun look red. The fact that distant stars are dimmed and reddened by intervening gas and dust is clear evidence of an interstellar medium.

Answer to Question 2

T Tauri stars are protostars with about the mass of the Sun that show signs of active chromospheres as you might expect from young rapidly rotating stars with strong magnetic dynamos. T Tauri stars are also often surrounded by thick disks of gas and dust that are very bright at infrared wavelengths.



ashley

  • Hero Member
  • *****
  • Posts: 584

aruss1303

  • Sr. Member
  • ****
  • Posts: 314

 

Did you know?

Your heart beats over 36 million times a year.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

For a complete list of videos, visit our video library