Results 351 to 360 of about 7,751,768 (367)
Nature, 1960 THE luminosity equation for the trail of a meteor is: where I is the luminous intensity at any point of the trail, is the rate of ablation of the meteoroid at that point, ν is the velocity of the meteoroid ...
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International Astronomical Union Colloquium, 1988
AbstractWe use a semi–analytical model of supernova light curves that extends Arnett’s scheme [1,2] to include the effect of recombination of hydrogen, helium and heavy elements in the expanding ejecta. Introducing in the model the physical parameters of Sanduleak −69 202, the salient characteristics of the light curve of SN 1987 A are reasonably ...
R. Schaeffer +3 more
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AbstractWe use a semi–analytical model of supernova light curves that extends Arnett’s scheme [1,2] to include the effect of recombination of hydrogen, helium and heavy elements in the expanding ejecta. Introducing in the model the physical parameters of Sanduleak −69 202, the salient characteristics of the light curve of SN 1987 A are reasonably ...
R. Schaeffer +3 more
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Light curve analysis of contact binaries: Characteristic quantities of the light curve
Astrophysics and Space Science, 1981Quantities characterizing light curves of contact binaries of W UMa-type are introduced. For 2700 cases, theoretical light curves of contact binaries are computed by the light curve synthesis method, and characteristic quantities for these light curves are tabulated. An example of application of the table to the light curve analysis of contact binaries
Atsuma Yamasaki, Atsuma Yamasaki
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Light-Response Curves in Land Plants
2018Light is the driving force for photosynthesis. Two techniques are commonly employed to help characterize the relationship between the light environment and photosynthesis in plants.Chlorophyll a fluorescence analysis is used to examine both the capacity for and the efficiency of the conversion of absorbed light into energy for photosynthesis ...
Robert A. Coe, Hsiang-Chun Lin
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1990
The supernova phenomenon was discovered because stellar explosions are prodigious sources of optical light. Although we know today that the energy budget for the core collapse of a massive star allocates 99% of the energy released to neutrinos and 1% to kinetic energy, the 10−4 part that becomes light makes super-novae the most luminous stars in the ...
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The supernova phenomenon was discovered because stellar explosions are prodigious sources of optical light. Although we know today that the energy budget for the core collapse of a massive star allocates 99% of the energy released to neutrinos and 1% to kinetic energy, the 10−4 part that becomes light makes super-novae the most luminous stars in the ...
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2014
In this chapter we use the multi-frequency single dish observations of CTA 102 to study the flaring behavior of the source. For our analysis we focused on the radio flare around April 2006 and used observations spanning from 4.8 to 340 GHz (see Fig. 3.1).
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In this chapter we use the multi-frequency single dish observations of CTA 102 to study the flaring behavior of the source. For our analysis we focused on the radio flare around April 2006 and used observations spanning from 4.8 to 340 GHz (see Fig. 3.1).
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Light curve variations in V471 Tauri
Astrophysics and Space Science, 1986The light curves of V471 Tau obtained in four successive years from 1981 to 1984 are presented. The light variations due to the tidally distorted red dwarf have been computed and subtracted out from the light curves obtained so far. A pure shape of the wave-like distortion has therefore been derived.
Ibanoğlu C. +3 more
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The distortions in the light curves of MM herculis [PDF]
Astrophysics and Space Science, 1987 The RS CVn-type eclipsing binary MM Her was observed photoelectrically inB andV colours. The light curves obtained in 1984 and 1985 are presented. It was found that the depths of the primary minima are decreased from 1983 to 1985. However, the amplitude of the wave-like distortion outside the eclipses was detected to increase since 1976.
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The light curve variations in AR Lacertae
Astrophysics and Space Science, 1982The eclipsing binary AR Lac has been observed in two colours,B andV, in 1980 and 1981. The new times of minimal obtained during the observatons indicate that the period of the system is still continuing its decrease. The wave-like distortions outside eclipses have two maxima and are very similar in shape in successive two years.
Evren, S +5 more
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