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A note on the discovery of a 2M_\odot pulsar
dense matter elementary particles pulsars general —stars neutron
2010/11/10
It is conventionally thought that the state equation of dense matter softens and thus cannot result in high maximum mass if pulsars are quark stars, and that a recently discovered 2M⊙ pulsar (PSR J161...
A Note on the Inverse Problem with LTB Universes
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
2010/12/23
The inverse problem with Lema\^itre-Tolman-Bondi (LTB) universe models is discussed. The LTB solution for the Einstein equations describes the spherically symmetric dust-filled spacetime. The LTB solu...
On the PMS Star HBC 498 and Its Associated Nebulous Stars (Research Note)
PMS Star Associated Nebulous Stars HBC 498
2009/6/25
On the PMS Star HBC 498 and Its Associated Nebulous Stars (Research Note)。
An interesting thought experiment claiming to highlight the connection
between singularities and the global arrow of time is re-analyzed, and a
further specification suggested. Against the criticism...
23 April 2007，Professor Robert (Erdelyi) von Fay-Siebenburgen and Dr Youra Taroyan, of the Solar Physics and Space Plasma Research Centre (SP2RC) at the University of Sheffield, combined observ...
Research Note On New Limits of the Coefficient of Gravitation Shielding
Gravitation shielding lower limits
2010/9/16
New limits of the shielding coefficients in the supposed phenomenon of gravitation shielding have recently become available. The new values are briefly reviewed and discussed in order to update the st...
A Note on Cosmological Parameters and the Topology of the Universe
Cosmological Parameters the Topology of the Universe
2010/10/15
Given the wealth of increasingly accurate cosmological observations, especially the recent results from the WMAP, and the development of methods and strategies in the search for cosmic topology, it is...