Subject: The freezing/unfreezing of cold dark matter
Date: Wed, 21 Apr 2004 16:16:12 +0300
From: Dimi Chakalov <dimi@chakalov.net>
To: Peter Meszaros <pmeszaros@astro.psu.edu>
CC: Andrei Beloborodov <amb@phys.columbia.edu>,
     R G Vishwakarma <vishwa@iucaa.ernet.in>,
     Angelo Loinger <Angelo.Loinger@mi.infn.it>,
     Masahiro Kawasaki <kawasaki@resceu.s.u-tokyo.ac.jp>,
     Robert S Mallozzi <mallors@crazyhorse.msfc.nasa.gov>,
     Jim Brainerd <jim.brainerd@msfc.nasa.gov>,
     Martin Rees <mjr@ast.cam.ac.uk>
 

Dear Professor Meszaros,

I learned from your web site that you've been studying the freezing of cold dark matter since 1974, but the actual nature of the dark matter still remains elusive. [Ref. 1]

Given our lack of knowledge about the cold dark matter and the so-called black holes [Ref. 2], I wonder what is your guess about the engine of Gamma-Ray Bursts,

Gamma-Ray Burst Physics,
http://www.astro.psu.edu/users/nnp/grb.html

http://www.astro.psu.edu/users/nnp/hypernova.jpg

How much "dark matter", and what kind of "dark matter" might be involved in these Gamma-Ray Bursts? I'm particularly curios about the jet, as depicted in the picture at the URL above, hypernova.jpg.

Since you've been studying the freezing of dark matter in the past thirty years, I suppose you have some insights on how it could be unleashed. It happens on a daily basis,

http://science.nasa.gov/newhome/pad/batse/batseskymap.htm

I would appreciate the opinion of your colleagues as well.

BTW I presume that you are aware of the controversial nature of the so-called black holes,

http://members.aon.at/chakalov/Loinger.html

I also presume that you are an open-minded scientist and can address these questions, unlike, say, Sir Martin Rees.

Best regards,

Dimi Chakalov
--
http://God-does-not-play-dice.net
 

References

[Ref. 1] Peter Meszaros, Cosmology with Gamma-Ray Bursts,
http://www.astro.psu.edu/users/nnp/cosm.html

"The earliest quantitative investigation of the importance of the gravitational effects of CDM on the baryonic fluctuations which give rise to galaxies was presented in Meszaros (1974) and (1975). These papers discussed the freezing of what came to be considered as cold dark matter fluctuations in the cosmological radiation, and the formation of galaxies and large scale structure mediated by such cold dark matter. This effect is used in all subsequent CDM calculations of structure evolution. Large scale structure observations, modeling and simulations are now a major activity in cosmology, but the actual nature of the dark matter still remains elusive."
 

[Ref. 2] Andrei M. Beloborodov, Theoretical Aspects of Gamma-Ray Bursts,
http://xxx.lanl.gov/abs/astro-ph/0404368

"Most of the proposed scenarios are based on the gravitational source of energy.[2] It can be a neutron-star merger, a collapse of a rotating massive star ("collapsar"), or a delayed collapse of a spinning neutron star ("supranova"), all of which lead to the formation of a black hole and an accretion disk of debris. GRBs can also be produced by just born neutron stars, however, we shall focus here on the accretion scenario as it is directly related to the subject of this meeting: black holes."
--
[2] P. Meszaros, ARAA, 40 (2002), 137.
 
 




Note: There are three kinds of particles, as explained by Yakov Terletsky (Ya.P. Terletsky, Paradoxes in the Theory of Relativity, New York: Plenum, 1968, available from DirectTextbooks). See the final remarks in Ch. VI, "the queer hypothesis of gravitational collapse" (translated from the 1961 Russian edition by D.C.).

There is plenty of energy for GRBs, but how do we get the jet? I don't think Einstein's GR could handle the three kinds of particles. Maybe Andrei Beloborodov [Ref. 2] can shed some light on this jet puzzle, since Russian theorists can explain just about everything.
 

D.C.
April 21, 2004