Dear Nereid and Phobos (seat belt on) can we talk about redshifts?

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Discussion Overview

The discussion revolves around the concept of redshift, particularly in relation to distance and the expansion of the universe. Participants explore theoretical models, including the implications of spacetime and gravitational effects on redshift measurements, with a focus on binary star systems and their relative ages.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes that redshift could indicate distance and suggests that different star systems might bend spacetime differently, affecting the observed redshift based on their age.
  • Another participant asserts that the expansion of the universe only occurs at inter-galactic distances and does not apply to gravitationally bound systems like binary stars.
  • A different participant questions the necessity of a new thread with the same name, indicating a potential overlap with existing discussions.
  • Another participant clarifies that the split of the thread was intentional to focus on specific ideas presented in a previous post, suggesting that the discussion is warranted in the current context.
  • One participant argues that redshift may not be visible at close ranges due to the proximity of gravitationally bound objects, referencing an analogy involving clocks to illustrate their point about spacetime differences.

Areas of Agreement / Disagreement

Participants express differing views on the applicability of redshift in gravitationally bound systems and the nature of spacetime effects, indicating that multiple competing perspectives remain without consensus.

Contextual Notes

Some assumptions about the nature of spacetime and redshift are not fully explored, and the discussion includes references to specific theoretical models that may not be universally accepted.

rob_we
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redshift difference theory...

Assuming that the redshift IS an indicator for distance there could be a possible explanation to the topic.:
Assuming furthermore the fact that according to Einstein space and time are just two sides of the same medal and using my thinking model ( www.donut-universe.info[/url] ), the two starsystems would bend the “torusskin” differently to the future as shown in the grafic ( [PLAIN]www.donut-universe.info/templates/twinstar.htm ).
Because the light would travel to the viewer from the big star (a) from a point further in future then from the small star (b), the small star would appear to have a bigger redshift. (its light travels from the past). Due to the expansion of the universe, and again according to my model, the viewer AND the bigstar are constatly increasing the spacetime distance which is causing the supposed acceleration of the smallstar(redshift).
Assuming that the timeline caused by expansion of the torus is linear (onedimesional) but the universe (space) and all inside of it is expanding in space (3 dimensional), this will cause an increasing arch in the torusskin.
So in this case we can not only think about space but about spacetime.
The differences in redshift of different twin-systems could be caused by their age.
Assuming two different twinsystems would have the same mass but a different age, the redshift difference will accordingly be different...
 
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Expansion of the universe only occurs at inter-galactic distances. It does not occur between gravitationally bound objects, such as binary star systems or stars within the same galaxy.
 
Ummm... why do we need another thread with the same name? Was this one split off from the other?

- Warren
 
Yes. I suggested that rob_we's post contained some interesting ideas, worthy of discussion ... here in Theory Development, and the rest of the thread could continue in General Astronomy & Cosmology. SelfAdjoint split the post off (I didn't realize it would have the same name).
 
Chronos, due to my idea it is not "simply not occurring" but not visible because of the "close range" we are in. Remember the experiment (I also mentioned in my theory), about the two clocks that start to differ in time immediately when one clock is put on Earth and one to space. Due to the space-time definition this IS the "redshift" just measured differently.
If the space time difference is now caused by a huge amount of mass-difference and a certain distance to the viewer, the redshift which is increasing on the torusskin that expands, would be definitely visible!
Its like a balloon-skin that swings while being pumped up (without increasing its skin-stress)! The greater the mass difference the greater the time difference.The longer the wave travels the bigger the shift...
Referrence:
www.donut-universe.info/templates/twinstar.htm[/URL]
[url]www.donut-universe.info[/url]
 
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