Single-Page Cosmology
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LearningTranscript
00:00G'day viewers. In this episode we're going to look at what's required to
00:04construct a single page summary of some of the most important numbers in
00:08cosmology in three steps. On screen you can see three boxes red, blue and magenta.
00:14Each box denotes a step. The first step yields the following outputs constrained
00:19by cosmic microwave background radiation temperature. Number one, the power
00:24spectrum Hubble constant. Number two, the cosmic distance ladder Hubble constant.
00:29Number three, total cosmological mass. Number four, cosmological age. Number five,
00:36cosmological mass density. And number six, the cosmological constant. The second
00:42step yields the following outputs constrained by cosmic microwave
00:46background radiation temperature. Number one, total galactic mass. Number two,
00:51virial radius. Number three, virial velocity. The third step yields the
00:57following outputs constrained by cosmic microwave background radiation
01:00temperature. Number one, the dark energy density parameter. Number two, the
01:06pressureless matter density parameter. Number three, the baryonic matter
01:10parameter. Number four, the dark matter parameter. Okay, let's now take a look at
01:15the building blocks of the single page summary. We can build a single page
01:20summary of cosmology by executing three steps. The first step involves deriving a
01:25relationship between the cosmic microwave background radiation
01:29temperature and the Hubble constant, as emphasized by the rounded purple box. You
01:34can locate its complete derivation by following the links appearing on screen.
01:38Once the relationship between the cosmic microwave background radiation
01:42temperature and the Hubble constant has been formulated, we can use it to
01:47constrain the values of important cosmological parameters, as emphasized by
01:51the rounded purple boxes. If you are interested in the derivation of these
01:55parameters, please follow the links appearing on screen. Some important
01:59takeaways from this first step are as follows. Number one, we assert that the
02:04cosmological constant is not truly constant, hence its value was zero when
02:09the universe was approximately 7.3 billion years old. Number two, the instant
02:14in cosmological time which the particle data group attributes spontaneous
02:18cosmological acceleration to have occurred actually relates to the instant
02:23at which the cosmological constant was zero, that is, when the universe was
02:27approximately 7.3 billion years old. Number three, cosmological acceleration
02:32actually occurred during the cosmological acceleration period, as
02:36indicated by T sub 1. Number four, because the standard model of cosmology does not
02:42recognize that the cosmological constant is actually a time-varying function, the
02:47particle data group mistakenly associates the experimentally observed
02:51value of lambda with the present epoch. However, the electrogravimagnetic
02:56construct insists that the particle data group value of lambda actually relates
03:01to a cosmological age of approximately 11 billion years. Electrogravimagnetics
03:07asserts that the true present epoch value of lambda is slightly lower, as
03:11appears on the right-hand side of the lower rounded purple box. Number five,
03:16cosmological acceleration transitioned from negative to positive when the
03:20universe was approximately 9.6 billion years old. This coincides with the
03:25Freeman assertion that cosmological acceleration commenced when the universe
03:29was approximately 10 billion years old. However, recalling our previous statement
03:34that cosmological acceleration actually began during the cosmological
03:38inflationary period means that the Freeman estimate actually relates to the
03:43cosmological instant when cosmological acceleration transitioned from negative
03:47to positive, not the actual commencement of cosmological acceleration, as Freeman
03:52asserts. Let's now move on to steps two and three. In step two, we utilize the
03:58cosmic microwave background radiation temperature and the power spectrum
04:02Hubble constant to constrain Milky Way mass. Please refer to the solution
04:07algorithm. Our value of Milky Way mass is approximately 43% of the value returned
04:13by a basic Google search. This is not unusual once you consider the broad
04:17spectrum of estimates which exists in the scientific literature. In fact, a key
04:22point we make in our published research article is that total Milky Way mass is
04:27a long-standing question without clear and precise resolution. An array of
04:31estimates exist, many of which seem to partially agree, partially disagree, or
04:36totally disagree with each other. For example, the Paris Observatory estimates
04:41the mass of the Milky Way to be approximately 2 billion solar masses
04:45rather than the 1.5 trillion solar masses returned by a simple Google
04:50search. That is, the Paris Observatory result is approximately 14% of the
04:55Google search result as of the date of this video presentation. So, the range in
05:00Milky Way mass estimates is quite broad. In step three, we constrain dark energy
05:05and dark matter to the cosmic microwave background radiation temperature and
05:09power spectrum Hubble constant. Needless to say, all of the results generated in
05:14this single-page cosmology summary align extremely well with the standard model
05:19of cosmology.