Red shift, gravity, and dark energy.

  • Thread starter Sci1
  • Start date
6
0
When matter is transformed into light energy within a star, the gravity associated with the matter is now associated with the light's energy. As space expands, the redshift is dilluting the light's energy and reducing the gravity associated with that energy. Would the energy dillution further weaken the gravitational bonds between galaxies in addition to the expansion itself, giving the appearence of dark energy acceleration?
 

Ich

Science Advisor
1,931
1
Last edited by a moderator:

Chalnoth

Science Advisor
6,192
441
When matter is transformed into light energy within a star, the gravity associated with the matter is now associated with the light's energy.
Nope, doesn't work this way. The energy emitted as light from a star stems directly from the nuclear reaction at its core. Except for brown dwarfs, stars are stable objects which do not collapse under gravity for the majority of their life cycle. The gravity of a star is entirely separate.

As space expands, the redshift is dilluting the light's energy and reducing the gravity associated with that energy. Would the energy dillution further weaken the gravitational bonds between galaxies in addition to the expansion itself, giving the appearence of dark energy acceleration?
Nope.
 
This is a result of frame-dependence in the measurement which leads to the appearance of energy attenuation, right?
 
6
0
Nope, doesn't work this way. The energy emitted as light from a star stems directly from the nuclear reaction at its core. Except for brown dwarfs, stars are stable objects which do not collapse under gravity for the majority of their life cycle. The gravity of a star is entirely separate.
Chal, I am going to post another topic on this to better understand.
 

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top