Analyses of Wolf-Rayet ultraviolet spectra     

Krzysztof Rochowicz 《Astrophysics and Space Science》1996,238(1):71-74

Ultraviolet spectra of population I WR stars obtained from IUE archive are used to determine fundamental stellar parameters. Terminal velocities for 85 galactic and LMC Wolf-Rayet stars were obtained by means of the empirical relation between spectral quantities easily measured in low resolution and high-resolution terminal velocity measurements. Temperatures and so-called transformed radii were derived based on available contour plots of spectral characteristics for a grid of NLTE models. The effect of the reddening law on stellar far ultraviolet continua is emphasized and the revised extinction curve towards WR stars is used for dereddening. For the sample of stars attributed to open clusters or associations we construct the stellar distance scale and adopt it for the other WR stars. The remaining fundamental parameters are derived and HR diagram for population I WR stars is presented.  相似文献   

Adaptive Smoothing Method For Computer Derivation of K-Indices     

Krzysztof Nowo&#;y&#;ski  Tomasz Ernst  Jerzy Jankowski 《Geophysical Journal International》1991,104(1):85-93

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On the origin of the auroral inverted-V electron spectra     

Krzysztof Stasiewicz 《Planetary and Space Science》1984,32(3):379-389

On the basis of quasi-linear theory of ion-acoustic turbulence it is shown that the angular and energy distribution of the electron spectra observed in quasi-static inverted-V structures are natural products of electron heating and runaway processes occuring in a region of current-driven turbulence located at h ≈ 1 Re. The power law population J ∞ E^?γ, with γ ≈ 1 observed in the energy range ~ 25–1000 eV, is interpreted as a quasi-stationary distribution of suprathermal electrons interacting resonantly with the ion sound waves. This spectrum is generated in the turbulent region and convectively transported earthward along the magnetic field lines. Field-aligned intense electron fluxes with collimation angle < 10° are explained as due to particles escaping from the turbulent region through the runaway cone—a characteristic feature of velocity-space in ion-acoustic turbulence. A complete, new interpretation of the observed electron spectra is given on the basis of the proposed physical acceleration mechanism along with many other implications of this theory.  相似文献   

Velocity field in nebulae around [WC] stars     

Krzysztof Gesicki  Agnès Acker 《Astrophysics and Space Science》1996,238(1):101-104

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Sunshine duration and its variability in the main ridge of the Karkonosze Mountains in relation to with atmospheric circulation     

Urban  Grzegorz  Migała  Krzysztof  Pawliczek  Piotr 《Theoretical and Applied Climatology》2018,131(3-4):1173-1189

Theoretical and Applied Climatology - Sunshine duration analysis was based on a series of measurements spanning the period from 1901 to 2014 for Śnieżka (1603&nbsp;m&nbsp;a.s.l.)...  相似文献   

Book review     

S. J. Gibowicz  Jeremy Bloxham  Petr Vaniček  Gerardo G. Tango  Gerardo G. Tango  Lev Truskinovsky  Konrad Bajer  Krzysztof Haman 《Pure and Applied Geophysics》1991,135(3):493-512

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Book reviews     

Geoffrey Abers  Robert D. Cicerone  Douglas J. Galpin  William Power  Tracy Rushmer  J. Leliwa-Kopystynski  Krzysztof Haman  Daniel Wójcik  Michal Herbich  Bogumil Jakubiak  Szymon P. Malinowski 《Pure and Applied Geophysics》1996,147(3):585-610

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The Taylor series method for the problem of the rotational motion of a rigid satellite     

Krzysztof Goździewski  Andrzej J. Maciejewski 《Astrophysics and Space Science》1995,232(1):167-184

This paper presents the Taylor series method for integration of differential equations describing the rotational motion of a rigid satellite. We compared the presented algorithm with other methods, and we show that it gives the most accurate results with reasonable efficiency.  相似文献   

On the gravitational fields of Pandora and Prometheus     

Krzysztof Goździewski  Andrzej J. Maciejewski 《Earth, Moon, and Planets》1995,69(1):25-50

Utilizing topographic models of Saturn's F-ring shepherd satellites Prometheus (S16 1980S27) and Pandora (S15 1980S26), derived by Stooke (1994), and supposing that their mass density is constant, we derived basic geometrical and dynamical characteristics of the moons. They include the volume and mass, the mean radii, the tensor of inertia, and Stokes coefficients of the harmonic expansions of external gravitational potential. The best fitting ellipsoid approximations of the topography were calculated. A simple method of determining the gravitational potential on the surface of an irregular satellite is presented. Examples of equipotential surfaces of the satellites are shown  相似文献   

Solutions homoclinic to regular precessions of a symmetric satellite     

Andrzej J. Maciejewski  Krzysztof Goźiewski 《Celestial Mechanics and Dynamical Astronomy》1995,61(4):347-368

The aim of this paper is to study numerically asymptotic manifolds and homoclinic solutions to the regular precessions of a rigid symmetric satellite in a circular orbit.  相似文献