Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session AAA01: V: Alternative Astrophysics |
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Sponsoring Units: DAP Chair: Gh. Saleh, Saleh Research Centre Room: Virtual Room 1 |
Wednesday, April 26, 2023 1:00PM - 1:12PM |
AAA01.00001: Avoiding the Mass Injection Problem for Astrophysical Jets by using Directed Gravity (Relativistic Beaming of the Gravitational Force.) Bradford C Blake Astrophysical jets emitted at the poles of many black holes are difficult to explain because the gravitational force is presumed too powerful to allow for the escape of massive particles from the hole. However, if Directed Gravity (relativistic beaming of the gravitational force) applies to black holes, then the gravitational force in the polar directions should be reduced, allowing the pressure differential to overcome gravity, such that jets of superfluid neutrons can escape the black hole at the poles. |
Wednesday, April 26, 2023 1:12PM - 1:24PM |
AAA01.00002: Experiments with lasers that will help to refine the value of the Hubble constant Firyuza Yanchilina In modern astrophysics, it is assumed that the redshift effect in a certain galaxy is caused by only one reason: the speed of removal of this galaxy from us. We believe that the growth of the gravitational potential of the universe, caused by the expansion of the universe, makes an additional contribution to the redshift in the spectrum of each galaxy. This contribution is because photons coming from the past already had a lower frequency at the moment of their birth. It is because they were born in a region of lower gravitational potential. According to our estimations, this contribution is about 1/3 of the observed redshift effect in the spectrum of each distant galaxy. Accordingly, the contribution caused by the Doppler effect is about 2/3. To test these estimations, we propose to carry out two different experiments, each of which will unambiguously either confirm or refute the presence of the effect we predicted. The first experiment will be with a highly stable laser (relative error 10-16-10-17) and ideal mirrors, the creation of which MIT announced in 2013. The second experiment uses a ground-based laser and corner reflectors on the Moon. If the predicted effect is confirmed, the results of the experiments will significantly refine modern estimates of the Hubble constant, the age of the Universe, the amount of dark energy and dark matter. |
Wednesday, April 26, 2023 1:24PM - 1:36PM |
AAA01.00003: A new single-length-scale similarity solution for an infinite homogeneous expanding universe using Einstein's averaged field equations. William K George, Gunnar Johansson A similarity solution is proposed [1] in which both time and space independent variables are scaled with a single time-dependent length scale, δ. It grows linearly with gravitational time t, but exponentially with atomic clock (or proper) time, τ. The resulting Ricci tensor is identically zero, so there is no critical density criterion. The energy density is shown to have evolved by a factor of -120 orders of magnitude to the currently measured values from the quantum field BIG BANG estimate (the so-called `Worst Prediction in the History of Physics’). There is no need for dark matter or dark energy. The Hubble parameter is H/Ho=to / t = 1+z where to is the age of the universe and z is the redshift. Ho =63.4 provides an excellent fit to the data, and corresponds to an age of the universe of 15.4 billion years. Excellent agreement is also shown with the supernovae data, previously believed to imply the universe is accelerating. |
Wednesday, April 26, 2023 1:36PM - 1:48PM |
AAA01.00004: Rate Change Science: Dark Matter and Energy Constructs Kenneth Strickland Rate Change Science (RCS) is a new frontier. It is just as much a reorganization of science as it is the modernization of “rate of change”. This discipline is a representation of objects, derivatives and attributes that have populated the universe since the big bang. Like stereoscopic vision this new science outlook sees the universe for all its geometrical grandeur. The first upgrade was to invent a rate change graph. This missing piece of the puzzle gives an observer views of the universe through the eyes of rate change objects, visible and invisible. |
Wednesday, April 26, 2023 1:48PM - 2:00PM |
AAA01.00005: Our universe is inside a black hole; dark energy is gravity David Parker In absolute space and time, the Schwarzschild metric has a coordinate singularity at the Schwarzschild radius. The coordinate singularity can be transformed away by changing the coordinate system. However, if the developers of our universe used absolute space and time for our coordinate system, then the coordinate singularity at the Schwarzschild radius is a real singularity in our universe. In which case, astronomical observations indicate that our universe is inside a black hole because in absolute space and time: 1) the singularity at radius 0 is repulsive, explaining the big bang, and 2) the singularity at the Schwarzschild radius attracts matter inside the black hole toward the inner surface and adds a gravitational redshift, explaining dark energy and the apparent accelerating expansion of our universe. It is within error bars that the inner surface of our black hole is plastered with a great shell 1.7E-15 meters thick at neutron star density, so the great shell could be a single layer of neutrons. Many other predictions arise, including that we may live in a bang-bang universe where matter is blasted back and forth between radius 0 and the great shell, and that event horizon expansion is increasing the size and mass of our universe. |
Wednesday, April 26, 2023 2:00PM - 2:12PM |
AAA01.00006: Periods of Mass Extinctions Are About 250 Million Years Relate To The Structure of The Milky Way Galaxy Dayong Cao 15 mass extinctions were known below: |
Wednesday, April 26, 2023 2:12PM - 2:24PM |
AAA01.00007: Can we measure component spins from black hole binaries? Zoe Ko, Simona J Miller, Katerina Chatziioannou, Thomas A Callister Gravitational wave (GW) observations of binary black hole (BBH) mergers provide measurements of BBH parameters such as mass and spin, which shed light on the evolutionary history of these systems. Data from the Laser Interferometer Gravitational-wave Observatory (LIGO) currently provides strong constraints on effective spin, a mass weighted average of each black hole's spin projected in the direction of the orbital angular momentum, while the individual spin magnitudes and tilt angles ("component spins") remain weakly constrained for individual events. In this talk, I explore whether we can differentiate synthetic populations with the same effective spin distributions but different underlying component spin distributions. I also discuss our ability to diagnose model misspecification by analyzing posterior predictive plots. This study provides insight into how much information we can extract about component spin of BBH mergers from LIGO data and how we can identify poor model fits, which will prove especially useful with LIGO's upcoming observing run (O4). |
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