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Below is an excerpt from a quite speculative model I've been working
on for years and recently put up on my website, in all its glory... :-] While possibly "...not even wrong...", it may at least have value as a stimulant to 'crazy' physics in the sense of Bohr and Pauli, around which might coalesce better and, currently, somewhat estranged mainstream ideas in theoretical physics: "BLACK-HOLE-MEDIATED DAUGHTER-UNIVERSES AS SOURCES OF 'DARK MATTER' GRAVITATIONAL POTENTIAL (DMP, = -v^2), PROPAGATING BACK INTO OUR UNIVERSE. THE LARGE NUM- BERS HYPOTHESIS REVISITED. Where... The total black hole (bh) mass interior to a galactocentric spherical surface, with radius r, varies as DMP^2, or v^4. I explore a model, which contains some changing 'constants', giving current universe age as 13.82 Gyr, very near the recent results from WMAP (which gives a best fit age of 13.7 Gyr.), and which also yields an unusual 'Klein-Gordon' type equation relating the mass of a bh and that of the DU it links to. The resulting 'dark matter'-enhanced velocity field corresponds closely with the observed flat velocity curves of spiral galaxies, as an example. A. OVERVIEW. In the following I present a very incomplete model which nevertheless has a number of intriguing points of contact with the real world and with several outstanding problems in astrophysics. Our universe would be one of an infinite sequence of proliferating, branching universes, per- haps comparable to an infinite network of brane-universes. While young, our universe would be typical in that each black hole in it would connect to a separate, unique baby or daughter universe. In this re- spect, the model is a distant relative to the old Einstein-Rosen Bridge... where passage through the bh brings us to another part of our universe or to another universe entirely, via a "white hole". However, in the cur- rent model, each baby universe IS the 'white hole', on the -other- end of a bh bridge, while the bh itself lives in a parent universe one step back in the sequence. By extension, we would then live in but one of many daughter universes (DUs) connected to and expanding 'alongside' another parent-universe. This relationship continues without limit upward through super parent uni- verses, but not downward. An apparent conservation of fundamental fermions (or more precisely, their wavefunctions) falling into and through bh's constrains the maximum number of daughter and grandaughter uni- verses 'below' us. The total numbers of such particles entering a bh must be identical to the numbers of same-class-fermions emerging in the resulting DUs and cannot be subdivided arbitrarily. I suspect that this last may be related to a rough equality between a universe's 'cross-sec- tion', as it were, and the total sum of the 'cross sections' of its stable bar- yons, and that this may be connected to the Holographic Principle of G. 'tHooft, L. Susskind and others (see footnote #3 at this article's end). The model is driven by a large numbers hypothesis with certain fund- amental 'constants' changing from initial setpoint values at time-zero. It needs to be said that variable fundamental parameters, per se, are less significant than those which are actually dimensionless, such as particle mass ratios and ratios of strengths of interactions such as the gravitational fine structure constant. While G, Newton's constant, and Mpl, the Planck mass, are true con- stants, some parameters would change as shown below: @t_o - - - - - - - - - - - - - - - - - present - - - - - - - - - - - - - - in futu __________________________________________________ ____ Mp~Mpl - - - - - - - - - - - - - - Mp~10^-27kg - - - - - - - - - - - decreases Me~Mpl - - - - - - - - - - - - - - Me~10^-30kg - - - - - - - - - - - " hbar~10^-15 j*s- - - - - - - - h-bar~10^-34 j*s - - - - - - - - - - " Rp~5470m - - - - - - - - - - - -Rp~10^-15m - - - - - - - - - - - - " Rpl~5470m - - - - - - - - - - - Rpl~10^-35m - - - - - - - - - - - - " Co~10^-11m/s - - - - - - - - - Co~3*10^8m/s - - - - - - - - - - -increases Ru~5470m - - - - - - - - - - - -Ru~10^26m - - - - - - - - - - - - - " Mu~Mpl - - - - - - - - - - - - - - Mu~10^53kg - - - - - - - - - - - - " hbar*Co/G*Mp*Me..(reciprocal of 'grav'l fine structure constant)..., ~unity - - - - - - - - - - - - - - - 10^41 - - - - - - - - - - - - - - - - - " NOTE: While it does not seem required within the model, it seems possible that, additionally, the ratio of the proton to the electron mass increases from near unity at t_0, to ever larger values over time, thus: Mp/Me~unity - - - - - - - - - - -Mp/Me~1836 - - - - - - - - - - - - increases . (Mp, Me, and Mu are proton, electron and universe masses. hbar is Planck's constant/2 pi. Rp, Rpl are proton and Planck radii and Ru is universe radius-of-curvature. Co is vel. of light. Mpl is ~2.17*10^-8kg.) Regardless of its position in the postulated infinite sequence of universes, the mass of any universe is always: Mu = Mpl^4 / (Mn^2 * Me) or equivalently = h-bar^2 * Co^2 / (G^2 * Mn^2 * Me) , in the current values of fundamental parameters of that particular uni- verse. [Note, Mn is approximately the nucleon mass. Thus, while it could be the proton mass or the neutron mass, it could arguably be the sum of the proton and the electron masses. As it stands, the model is not clear enough to resolve this.] Radius of curvature of universe is always: Ru = 2 G * Mpl^4 / (Mn^2 * Me * Cd^2) or = 2 hbar^2 / (G * Mn^2 * Me). See (8) & (9) below. It is clear that if the above is at least approximately correct, that for Ru to increase at all over time, there must be commensurate change on the right hand side of the relations. The particular large numbers hypothesis here states that Ru is always = {[hbar*Co / (G*Mn^2)] * 2[Mn/Me]} * {hbar / (MnCo)} , where the factor inside the first braces is the reciprocal of the gravita- tional fine structure constant multiplied by twice the nucleon-electron mass ratio. The factor in the second braces is the Compton wavelength of the 'nucleon'. Note that 2G * Mu / Ru = Co^2 at all times, which is a defining Schwar- zschild criterion for black holes. Minimum (ie: stellar) mass of gravitationally formed black hole, the most extreme end state of a collapsar... [Mbh = Mpl^3 / Mn^2 = hbar^2 * Co^2 / (G^2 * Mn^2 * Mpl). Currently [Mbh = 3.681 * 10^30 kg., or ~1.85 Msol in our universe. This increased from ~Mpl @ t_0, and will increase in the future. I speculate that [Mbh is also an index of physically possible stellar masses over cos- mic time. Thus stars on average would have had smaller masses in the past. Due to an ever decreasing gravitational-fine-structure 'constant', alpha_g = G*Mn*Mn / hbar*Co, they will have to reach ever greater masses in the future in order for resulting pressures and temperatures to overcome proton-proton repulsion, initiating thermonuclear regimes. This means that the formation masses of typical proto-stars must in- crease indefinitely over cosmic time. It follows also that no mini-bhs with masses [Mbh would exist in such a universe (with the brief exception of those forming initially at the centers of massive stellar cores which are collapsing to form bhs with masses = or [Mbh.) The null result of searches for Hawking signatures of exploding mini-bhs in the universe is consistent with this......" snip For the following, Md and Rd are, respectively, effective mass and radius of curvature of daughter universe DU, and r is the radius of a galacto- centric sphere in our universe. Also, the 'DU' being considered is act- ually the net, collective effect of all the smaller DUs linked to all the individual black holes inside r, acting non-linearly, as though they were all located and propagating back through a *fictitious* super bh at the center of the galaxy: "With that caveat, it is worth noting that virtually -all- the Milky Way's bhs would likely reside within a distance of ~200,000 LY (=1.892*10^21m) with a resultant net DU mass Md = 9.61*10^42 kg and an Rd equal to 5.25*10^22 m, and so would give the following total potential (from both normal and 'dark matter') at that distance, using (11): Thus: normal potential + DMP = - G*Mgal / r - 2*G*Md/(r+Rd), or... normal + dark matter potential = - G*(M_stars+gas) / r - 2G*(9.61*10^42kg) / (r + 5.25*10^22 m). Letting M_star+gas = ~4*10^41 kg, and r = 1.892*10^21m gives a total potential TP - (118,700m/s)^2 - (153,500m/s)^2 = - (194,000m/s)^2. The first term on the left is due to normal matter deep inside r, and the larger second term is from the DU-generated potential, only attenuated somewhat at r due to its unusual keplerian nature. The values of M_star +gas, and especially the number and distribution of bhs in our galaxy are not well known, so this kind of calculation can only have the crudest back-of-the-envelope value at this time. Furthermore, even the orbital parameters of nearby satellite galaxies like the Large Magellanic Cloud are currently not known well enough to provide a clear 'pass or fail' test of this model. Yet, the above result is broadly compatible with the gen- eral trend of published observations in the literature on the distribution of dark and normal matter in galaxies and galaxy clusters. Incidentally, circumstantial support for this posited link between black hole content of a galaxy and its DMP is given in a paper by A. Ferrara and E. Tolstoy, "The role of stellar feedback and dark matter in the evo- lution of dwarf galaxies", 2000MNRAS.313..291F, which noticed a tight correlation between dark matter content and metallicity in dwarf gala- xies. Here the point is that metallicity is a fair index of bh content since metals are largely broadcast into the interstellar medium by the same supernova events which often create bhs...." It must be clear to the reader by now that I have rushed in where angels fear to tread! The full text of my rather loose model can be seen at http://home.earthlink.net/~stargene/ Cheers, Gene |
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