2.the quality of being intellectually brilliant, enlightened, inspired, etc. 3.something luminous. 4.the brightness of a star as compared with that of the sun. 5.Also calledluminos′ity fac`tor.the brightness of a light source of a certain wavelength as it appears to the eye, measured as...
Milne (NATURE, Mar. 22) against my treatment of the problem of stellar luminosity. The outcome of my investigation is a formula which predicts the luminosity of a star of given mass and radius (or mass and effective temperature). I have followed the common procedure of first employing ...
Modern hypothesis, which treats confidently of an 'electron gas' with an atomic weight, as Ramsay boldly and prematurely proposed long ago, and subject to the Maxwell-Boltzmann exponential energy formula for statistics of distribution, and to its consequences for the theory of dissociation of mixed...
A calibrated blend of radiant pearl mica embedded in an ultra-lightweight sheer to medium buildable formula mimics the reflective glow of just lit candles. This mica mélange mingles with refreshing purified water to give skin a burst of hydration and help foundation glide onto skin for lasting...
Power in Physics | Definition, Units & Formula from Chapter 8/ Lesson 12 78K What is power? Learn what is power in science and the definition of power in physics. See what is measured by power in physics and the units representing power. ...
Here [[PHI].sub.bol](L, z) is a bolometric luminosity function (defined for the luminosity L integrated over all wavelengths) and [bar.[eta]] represents an averaged radiation efficiency that is assumed not to depend on z or L in this formula. (12) The bolometric luminosity function of...
The Wide Field Planetary Camera 2 on board the Hubble Space Telescope (HST) has been used to obtain high-resolution images of NGC 3610, a dynamically young... BC Whitmore,F Schweizer,A Kundu,... - 《Astronomical Journal》 被引量: 150发表: 2002年 An empirical formula for the mass-loss ...
Precise trigonometric parallax measurements orders of magnitude more accurate than a milliarcsecond will contribute greatly to our understanding of peculiar, low luminosity stellar objects of several types. First, the volume of space out to which luminosities may be determined to the accuracy of the ...
OntheuniversalX-rayluminosityfunctionofbinarysourcesin 系统标签: luminosityraygalaxiesbinarysourcesfunction a r X i v : a s t r o - p h / 0 2 1 2 5 6 8 v 1 3 0 D e c 2 0 0 2 ONTHEUNIVERSALX-RAYLUMINOSITY FUNCTIONOFBINARYX-RAYSOURCESIN GALAXIES K.A.Postnov SternbergAstronomical...
unity. Although the Reimers formula provides a fair rep- resentation of the mass loss rates measured for G, K and (non-long-period-variable) M giants, it is well known that it predicts rates that are too low at the AGB-tip (e.g., de ...