Early photons from the early universe

Trimble, Virginia

doi:10.1016/j.newar.2006.09.003

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…5). Many authors (including T. Shmaonov) claimed that neither in Shmaonov's entourage nor in the Soviet scientific astronomical and physical community did anyone know about the interpretation of this discovery as an evidence of the validity of the hot Universe model proposed by Gamow, see for instance, [40][41][42]. But this statement does not seem to me to be completely accurate (as it was firstly noted in [43]).…”

Section: S E Khaikin As One Of the Brightest Representative Of The Ma...mentioning

confidence: 99%

Constraints on a Tidal Charge of the Supermassive Black Hole in M87* with the EHT Observations in April 2017

Zakharov

2022

Universe

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More than two years ago the Event Horizon Telescope collaboration presented the first image reconstruction around the shadow for the supermassive black hole in M87*. It gives an opportunity to evaluate the shadow size. Recently, the Event Horizon Telescope collaboration constrained parameters (“charges”) of spherical symmetrical metrics of black holes from an estimated allowed interval for shadow radius from observations of M87* in 2017. Earlier, analytical expressions for the shadow radius as a function of charge (including a tidal one) in the case of Reissner–Nordström metric have been obtained. Some time ago, Bin-Nun proposed to apply a Reissner–Nordström metric with a tidal charge as an alternative to the Schwarzschild metric in Sgr A*. If we assume that a Reissner–Nordström black hole with a tidal charge exists in M87*, therefore, based on results of the shadow size evaluation for M87* done by the Event Horizon Telescope collaboration we constrain a tidal charge. Similarly, we evaluate a tidal charge from shadow size estimates for Sgr A*.

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Section: S E Khaikin As One Of the Brightest Representative Of The Ma...mentioning

confidence: 99%

Constraints on a Tidal Charge of the Supermassive Black Hole in M87* with the EHT Observations in April 2017

Zakharov

2022

Universe

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“…Following the observation of the CMBR by Arno Penzias and Robert Wilson (1965), the interpretation by Dicke, Peebles, Roll, and Wilkinson (1965) gave no credit to Alpher, Herman, or Gamow's years of work on the problem of the early expanding Universe and the origin of the chemical elements.. They also did not provide references to other observations, many of which were made by Soviet physicists and radioastronomers (see Novikov, 1984;Trimble, 2006).…”

Section: Alpher Gamow and The Cmbr Predictionmentioning

confidence: 99%

Ralph A. Alpher, Robert C. Herman, and the Cosmic Microwave Background Radiation

Alpher

2012

Phys. Perspect.

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The first prediction of the existence of "relict radiation" or radiation remaining from the "Big Bang" was made in 1948. This derived from the seminal dissertation work of Ralph A. Alpher. He was a doctoral student of George A. Gamow and developed several critical advances in cosmology in late 1946, 1947, and 1948. Alpher developed the ideas of "hot" big bang cosmology to a high degree of physical precision, and was the first to present the idea that radiation, not matter, predominated the early universal adiabatic expansion first suggested by A. Friedmann in the early 1920s.Alpher & Herman predicted the residual relict black-body temperature in 1948 and 1949 at around 5 K. However, to this day, this prediction, and other seminal ideas in big bang cosmology, have often been attributed erroneously to the better-known George A. Gamow. This article reviews some of the more egregious and even farcical errors in the scholarly literature about Ralph A. Alpher and his place in the history of big bang cosmology. Two such errors are that (a) Alpher was a fictive person; or (b) that like the French mathematician Nicolas Bourbaki, Alpher was a "conglomerate" of theoreticians.©Anita Publications. All rights reserved.

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Early photons from the early universe

Cited by 2 publications

References 28 publications

Constraints on a Tidal Charge of the Supermassive Black Hole in M87* with the EHT Observations in April 2017

Constraints on a Tidal Charge of the Supermassive Black Hole in M87* with the EHT Observations in April 2017

Ralph A. Alpher, Robert C. Herman, and the Cosmic Microwave Background Radiation

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