Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Fields, B. D."'
Publikováno v:
Space Science Reviews 143, 415-425 (2009)
Because of the dynamic nature of the interstellar medium, the Sun should have encountered a variety of different interstellar environments in its lifetime. As the solar wind interacts with the surrounding interstellar medium to form a heliosphere, di
Externí odkaz:
http://arxiv.org/abs/0810.0441
Publikováno v:
J.Phys.G36:055201,2009
The identification of point sources poses a great challenge for the high energy community. We present a new approach to evaluate the likelihood of a set of sources being a Galactic population based on the simple assumption that galaxies similar to th
Externí odkaz:
http://arxiv.org/abs/0710.0874
Publikováno v:
Astrophys.J.677:27-36,2008
The large majority of EGRET point sources remain without an identified low-energy counterpart, and a large fraction of these sources are most likely extragalactic. Whatever the nature of the extragalactic EGRET unidentified sources, faint unresolved
Externí odkaz:
http://arxiv.org/abs/0710.0619
Publikováno v:
Astrophys.SpaceSci.309:81-87,2007
The large majority of EGRET point sources remain to this day without an identified low-energy counterpart. Whatever the nature of the EGRET unidentified sources, faint unresolved objects of the same class must have a contribution to the diffuse gamma
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611271
Publikováno v:
Ap&SS, 309, 43 (2007)
The third EGRET catalog contains a large number of unidentified sources. This subset of objects is expected to include known gamma-ray emitters of Galactic origin such as pulsars and supernova remnants, in addition to an extragalactic population of b
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611273
Autor:
Prodanovic, T., Fields, B. D.
Publikováno v:
Astrophys.J. 645 (2006) L125-L128
Cosmic-ray interactions with interstellar gas produces both 6Li, which accumulates in the interstellar medium (ISM), and $\pi^0$ mesons, which decay to gamma-rays which propagate throughout the cosmos. Local 6Li abundances and extragalactic gamma-ray
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605675
We review recent observational studies of heavy element abundances in low metallicity stars and explore some implications of these results for nucleosynthesis and early Galactic chemical evolution.
Comment: 11 pages, 6 figures. To appear in Proc
Comment: 11 pages, 6 figures. To appear in Proc
Externí odkaz:
http://arxiv.org/abs/astro-ph/0101440
In the standard hot big bang nucleosynthesis (BBN) model the primordial abundances of H, H2, He3, He4, and Li7, fix the baryon density of the universe, $\Omega_b$, via the baryon-to-photon ratio, $\eta$, for a given Hubble parameter. Recent observati
Externí odkaz:
http://arxiv.org/abs/astro-ph/9905211
Publikováno v:
Phys.Rev. D48 (1993) 2563-2572
We discuss in detail the effect of neutrino oscillations in Big Bang nucleosynthesis, between active and sterile neutrinos, as well as between active and active neutrinos. We calculate the constraints on mixings between active and sterile neutrinos f
Externí odkaz:
http://arxiv.org/abs/astro-ph/9307027
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