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Spectral Index as a Function of Mass Accretion Rate in Black Hole Sources. Monte-Carlo Simulations and an Analytical Description
black hole physics accretion disks radiation mechanisms
2010/11/16
We present herein a theoretical study of correlations between spectral indexes of X-ray emergent spectra and mass accretion rate (m˙ ) in black hole (BH) sources,which provide a definitive signature f...
Magnetars as Highly Magnetized Quark Stars: an analytical treatment
High Energy Astrophysical Phenomena (astro-ph.HE)
2011/1/6
We present an analytical model of a magnetar as a high density magnetized quark bag. The effect of strong magnetic fields (B > 5 x 10^{16} G) in the equation of state is considered. An analytic expres...
Comparison of the VIMOS-VLT Deep Survey with the Munich semi-analytical model - I. Magnitude counts, redshift distribution, colour bimodality, and galaxy clustering
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
This paper presents a detailed comparison between high-redshift observations from the VIMOS-VLT Deep Survey (VVDS) and predictions from the Munich semi-analytical model of galaxy formation.
Numerical versus analytical accuracy of the formulas for light propagation
Numerical versus analytical light propagation
2010/3/19
Numerical integration of the differential equations of light propagation in the Schwarzschild metric shows that in some situations relevant for practical observations the well-known post-Newtonian sol...
SEMI-ANALYTICAL FORMULAS FOR THE FUNDAMENTAL PARAMETERS OF GALACTIC EARLY B SUPERGIANTS
Stars: fundamental parameters Hertzsprung-Russell (HR) and C-M Stars: general
2010/10/29
The publication of new tables of calibration of some fundamental parameters of Galactic B0-B5 supergiants in the two classes Ia and Ib allows to particularize the eight parameters conjecture that mode...