Results 241 to 250 of about 727,921 (273)
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1974
The supernova of 1923 in M83 has only a partial, but continuous light curve (Figure 1) based entirely on Lampland’s assiduous observations at Lowell Observatory from May 5 to July 1, 1923 (Lampland, 1936). There are only three other published observations from Harvard; the SN was invisible on patrol camera plates (m> 14.0 and m> 13.5) on April 6 and 23
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The supernova of 1923 in M83 has only a partial, but continuous light curve (Figure 1) based entirely on Lampland’s assiduous observations at Lowell Observatory from May 5 to July 1, 1923 (Lampland, 1936). There are only three other published observations from Harvard; the SN was invisible on patrol camera plates (m> 14.0 and m> 13.5) on April 6 and 23
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Hydrodynamical models of type II supernovae
Astrophysics and Space Science, 1983A series of hydrodynamical models of type-II supernova outbursts (SNII) has been calculated. Approximate relations connecting the total outburst energy e, the mass of envelope ejectedM, the presupernova radiusR, and the amount of ionizing quanta radiated by the supernovaeN H with such values as the duration of the light curve plateau Δt, and absolute ...
I. Yu. Litvinova, D. K. Nadyozhin
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An overview of real‐world data sources for oncology and considerations for research
Ca-A Cancer Journal for Clinicians, 2022Lynne Penberthy +2 more
exaly
Physics of Type II Supernova Explosions
1989Supernova explosions are so energetic that one of the following two basic mechanisms must be responsible for each such event: Either a star-size fusion bomb explodes more or less as a whole, or the central core of a massive star in an advanced evolutionary phase becomes unstable and collapses to nuclear densities, thereby releasing an enormous ...
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The Energetics of Type II Supernovae
1984The energetics of type II supernovae is considered within the gravitational implosion-explosion picture. The total (internal plus gravitational) energies of different parts of the star are calculated, when they are in, or close to, hydrostatic equilibrium.
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Health insurance status and cancer stage at diagnosis and survival in the United States
Ca-A Cancer Journal for Clinicians, 2022Jingxuan Zhao +2 more
exaly
Type II Supernovae Photospheres and Distances
1982The kinematical method of determining distances to supernovae is briefly reviewed. A program to compute the required continuum flux from model atmospheres of Type II supernovae is outlined. The results of a perturbed gray-body calculation are presented to indicate qualitatively some of the important features to be expected.
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Spectral Diagnostics og Type II Supernova
1991The investigation of the spectra of Type II supernovae (SN II) is important for different fields in astronomy and astrophysics. Firstly, SN II are one of the most luminous single objects and may reach the same brightness at maximum as a whole galaxy. Therefore, they can be used as candles (KIRSHNER and KWAN, [1]) to determine the distances of galaxies,
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An overview of precision oncology basket and umbrella trials for clinicians
Ca-A Cancer Journal for Clinicians, 2020Kristian Thorlund, Edward J Mills
exaly