Clarification on Inflation and Color Index

Reply Tue 24 Feb, 2015 12:05 pm
I have two questions:

1) We know that the Universe is expanding at an accelerating rate. And the proof for that is the graph where on the x axis we have redshift values and on the y axis we have magnitudes. From the data of observations we plot type Ia supernovae, now we can tell what Hubble's constants were at different times and so the conclusion is that the Universe is expanding at accelerating rate. I read that dark energy is said to explain the inflation, but where and how can i see that in the graph that i described? Maybe there is another graph that clearly shows the inflation caused by the dark energy? So this first question is about the relation of inflation and dark energy and what graph indicates that.
2) What is the physical importance of color index? My thoughts were that the calculation of color index consists of subtraction of magnitudes in different wavelengths, it cancels out the distance property to the star and therefore we can tell the temperature of the star without knowing the distance to it. Apparently, I was told that's not it, I wonder what is the real importance of this index.

Any explanations are appreciated, thank you!
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Question • Score: 0 • Views: 804 • Replies: 1
No top replies

Reply Tue 24 Feb, 2015 04:42 pm
It also uses color sequences of spectr as measured from points of known intensity and wavelength. I think it fits under the concept of "Stndard candles" (Although Im not certain). Also, Hubbles constant has been further refined down in the decimal level by the redshifting of various elemental spectra
0 Replies

Related Topics

New Propulsion, the "EM Drive" - Question by TomTomBinks
The Science Thread - Discussion by Wilso
Why do people deny evolution? - Question by JimmyJ
Are we alone in the universe? - Discussion by Jpsy
Fake Science Journals - Discussion by rosborne979
Controvertial "Proof" of Multiverse! - Discussion by littlek
  1. Forums
  2. » Clarification on Inflation and Color Index
Copyright © 2020 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.04 seconds on 04/08/2020 at 10:32:16