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Prof. Remo Ruffini Festschrift. A conference in celebration of Prof. Remo Ruffini 80° birthday

16–18 May 2022
Europe/Paris timezone

ICRANet secretariat

Session

Contributions from Far East

16 May 2022, 07:50

Conveners

Contributions from Far East: Connections with China and Taiwan

  • Yunlong Zheng

Contributions from Far East: Connections with Korea

  • Hyung Won Lee

Contributions from Far East: Connections with Asia

  • Jiangong Gao

Presentation materials

There are no materials yet.

  1. 98. Congratulatory Letter upon the 80th Birthday of Professor Remo Ruffini
    Xinhe Bao
    16/05/2022, 08:00

    see attached document

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  2. 51. TBD
    Yifu Cai
    16/05/2022, 08:10
  3. 97. Pulsar timing and binary black holes
    Ye-Fei Yuan (University of Science and Technology of China)
    16/05/2022, 08:20

    The merging binary black holes (BBHs) have been detected by the ground gravitational-wave observatories, but it is very difficult to detect BBHs before their mergers. Since millisecond pulsars (MSPs) are remarkable precise ‘clocks’ in Universe, they could be used to detect the hidden BBHs, if they exist in systems of BBHs. Doing so, we construct a triple system which consists of a BBH and a...

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  4. 53. TBD
    Zigao Dai
    16/05/2022, 08:30
  5. 94. The motion of photons around black holes
    Wenbiao Han
    16/05/2022, 08:40

    The motion of photons around black holes deter- mines the shape of shadow and match the ringdown proper- ties of a perturbed black hole. Observations of shadows and ringdown waveforms will reveal the nature of black holes. In this paper, we study the motion of photons in a general parametrized metric beyond the Kerr hypothesis. We inves- tigated the radius and frequency of the photon circular...

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  6. 18. Connecting ringdown and shadow with photo motions
    Wenbiao Han
    16/05/2022, 08:50

    To be added

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  7. 45. TBD
    Jong-Hyeok SHIM (President Sogang University)
    17/05/2022, 08:00
  8. 43. TBD
    LEE Hyung Won
    17/05/2022, 08:15
  9. 86. Remo Ruffini and Charged Black Holes
    Sang Pyo Kim (Kunsan National University)
    17/05/2022, 08:30

    Reissener-Nordstrom and Kerr-Newman black holes in the Einstein-Maxwell theory have electric and/or magnetic charges.ThiboutDamour and Remo Ruffini studied quantum electrodynamical (QED) effect in Kerr-Newman geometries that is the Sauter-Schwinger mechanism of pair creation from charged black holes [T. Damour and R. Ruffini, Phys. Rev. Lett. 35, 463 (1975)], and proposed the mechanism for...

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  10. 42. TBD
    Stefano Scopel (Sogang University)
    17/05/2022, 08:45
  11. 141. Greeting from Prof. Jiangong Gao
    Prof. Jiangong Gao
    18/05/2022, 08:00

    This is Gao Jian gong from China.
    Dear Remo,
    Happy 80th birthday! I hope you have an amazing 80th birthday, filled with love from family, friends, and happy memories. Life has gone by so fast! Do you still remember 40 years ago, after the Marcel Grossman meeting in Shanghai, when you traveled to Urumqi, Xinjiang, in the central area of Asia and northwestern border of China? You left...

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  12. 134. Three arguable concepts: point particle singularity, asymmetric action of EM on quantum wave functions, and the Left out restricted Lorentz gauge from U(1)*
    Yousef Sobouti
    18/05/2022, 08:15

    We address three concepts. i. The point particle assumption inherent to
    non-quantum physics is singular and entails divergent fields and integrals.
    ii. In quantum physics electromagnetism (EM) plays an asymmetric role.
    It acts on quantum wave fields (wave functions) but the wave fields do not
    react back. We suggest to promote the one sided action of EM on quantum
    waves into a mutual...

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  13. 9. Some words on the roled played by prof. Ruffini in my scientific growth
    Daniele Gregoris (danielegregoris@libero.it)
    18/05/2022, 08:25

    In my talk, I will briefly share some memories about the important role played by prof. Ruffini in some of the most important stages and scientific experiences of my career. I will speak about the time of when I was a master student in prof. Ruffini's group at La Sapienza first, and then as a PhD student in the Erasmus Mundus program. Finally, I will spend some words about the concept of...

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  14. 16. Boson Stars and Dark Matter
    Prof. Soroush Shakeri ( IUT and ICRANet-Isfahan)
    18/05/2022, 08:35

    The concept of boson stars (BSs) was first introduced by Kaup and Ruffini-Bonazzola in the 1960s. Following this, a lot of attention has been directed to the possible role of BSs in astrophysics whether as a dark matter (DM) candidate or as the less exotic alternative to different types of black holes.
    Here, for the first time, we introduce a new class of compact objects as a mixture of...

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  15. 90. Coordinates in general relativity: the time from perihelion to aphelion
    Prof. Wenbin Lin (University of South China)
    18/05/2022, 08:50

    With a coordinate transformation, the Schwarzschild metric in the standard coordinate can become the one in the Kerr-Schild coordinate. In this work, we derive the second post-Newtonian solutions for the test particle’s motion in the Schwarzschild spacetime under these two coordinates, and show that the calculation results for the time from the perihelion to the aphelion are different. Since...

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