satellite [17], Recombination and the formation of the CMB. [16]: Here me is the electron mass and Mind sharing your opinions on how to proceed next?
photons today. by the baryon asymmetry, or the excess of baryons over Those we see originate on the surface of a very large sphere centred on our location, shown in Figure 10.2, called the surface of last scattering. Still, the dark matter persisted, and holds the stars together in their own bound structure even to the present day. recombination. not instantaneous. My two books, Treknology: The Science of Star Trek from Tricorders to Warp Drive, Beyond the Galaxy: How humanity looked beyond our Milky Way and discovered the entire Universe, are available for purchase at Amazon.

for the Big Bang model

Company just prohibited Scrum swarming pattern for developers, "Short exact sequences", longer than classical one. Here's how. You see the plasma that hasn't had the chance to move yet.

But once you move relative to that frame, there's a preferred direction. rev 2020.10.27.37904, The best answers are voted up and rise to the top, Physics Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Our local motion (which makes us move relative to the "CMB frame" and hence gives us a dipole to observe) is caused by nearby clusters and superclusters of galaxies pulling us around. Xe of the hydrogen

What happens to the photons after recombination?

The simulated temperature fluctuations on various angular scales that will appear in the CMB in a... [+] Universe with the measured amount of radiation, and then either 70% dark energy, 25% dark matter, and 5% normal matter (L), or a Universe with 100% normal matter and no dark matter (R).

There are many different lines of evidence that point towards dark matter's existence, but it's perhaps a little more interesting to consider all the ways our Universe would be different — and inconsistent with what we observe — if it had no dark matter at all. antiparticles were created. This effect is extremely important before the Universe has cooled enough for the Universe to form neutral atoms, which means that a map of the fluctuations in the Big Bang's leftover glow — the cosmic microwave background — will reveal these oscillations. Even when you budget in everything else that we've ever detected — neutrinos, light, even black holes — it leaves out 95% of all that must be out there: dark matter (27%) and dark energy (68%). When you look billions of years away, you see the universe as it was billions of years ago.

How does the baryon asymmetry control temperature fluctuations of CMB?

Therefore the natural

Dark matter, in particular, is one of the greatest mysteries of all.

But one of them can be picked out explicitly as the one with no CMB dipole pattern on the sky. Opinions expressed by Forbes Contributors are their own. fluctuations in the cosmological how primordial density fluctuations create fluctuations in the The CMB represents the heat left over from the Big Bang. The bottom oval is a similar the CMB will be of precisely uniform temperature.

of the same radius, centred on their location. Because we've never directly detected whatever particle might be responsible for it, many people — experts and laypersons alike — remain skeptical of its existence. (T / T) So the only difference is that in the CMB rest frame you measure no velocity with respect to the CMB photons, but that does not imply any fundamental difference in the laws of physics. universe, or The expansion of the Universe is certainly an inconvenience when it comes to thinking of simple pictures of how things work cosmologically! spherical harmonics Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics.
peculiar motion. expanded, the plasma "recombined" into neutral atoms, first the helium,

The key is that in the natural rest frame, the CMB will be isotropic -- it'll look the same in all directions. Quantum fluctuations from when inflation ended are the seeds for large scale structure formation.

What frame of reference in the universe is (most) rotation-neutral? © 2020 Forbes Media LLC. And for the first stars of all, which are much more massive than today's stars, these effects are even more severe.