Results 11 to 20 of about 386,815 (325)

The Protostellar Luminosity Function [PDF]

open access: yesThe Astrophysical Journal, 2011
The protostellar luminosity function (PLF) is the present-day luminosity function of the protostars in a region of star formation. It is determined using the protostellar mass function (PMF) in combination with a stellar evolutionary model that provides ...
Andre   +43 more
core   +3 more sources

Remarks on the maximum luminosity [PDF]

open access: yesPhysical Review D, 2018
The quest for fundamental limitations on physical processes is old and venerable. Here, we investigate the maximum possible power, or luminosity, that any event can produce.
Cardoso, Vitor   +3 more
core   +2 more sources

Luminosity by Attrition [PDF]

open access: yesNature, 1920
WITH reference to Sir Ray Lankester's suggestion in NATURE of November 4 that chemists should endeavour to ascertain the cause of the “empyreumatic” odour which accompanies the flashes of light produced by rubbing two quartz pebbles together, may I suggest also that the inquiry might be extended to include other substances which possess this property ...
  +17 more sources

Luminosity–time and luminosity–luminosity correlations for GRB prompt and afterglow plateau emissions [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2015
12 pages, 17 pictures accepted in MNRAS, 28 May ...
Maria Giovanna Dainotti   +6 more
openaire   +5 more sources

The nuclear to host galaxy relation of high redshift quasars [PDF]

open access: yes, 2007
We present near-infrared imaging with ESO VLT+ISAAC of the host galaxies of low luminosity quasars in the redshift range 1 < z < 2, aimed at investigating the relationship between the nuclear and host galaxy luminosities at high redshift.
Aldo Treves   +10 more
core   +3 more sources

Chemical and agronomic development of Kalanchoe brasiliensis Camb. and Kalanchoe pinnata (Lamk.) Pers under light and temperature levels

open access: yesAnais da Academia Brasileira de Ciências, 2011
This study compares the development of Kalanchoe brasiliensis and Kalanchoe pinnata, which are medicinal species known as "saião" and "folha da fortuna" that are used interchangeably by the population for medicinal purposes.
Bruna P. Cruz   +3 more
doaj   +1 more source

Precision luminosity measurements at LHCb [PDF]

open access: yesJournal of Instrumentation, 2014
100 pages, 57 ...
C. Santamarina Rios   +347 more
openaire   +20 more sources

The Luminosity Determination [PDF]

open access: yesHighlights of Astronomy, 1995
The Hertzprung-Russel (HR) diagram luminosity calibration relies basically on three kinds of data: trigonometric parallaxes, kinematical data (proper motions and radial velocities) and cluster distances obtained by the zero-age main sequence fitting procedure.
C. Turon, A.E. Gómez
openaire   +1 more source

A Novel Luminance-Based Algorithm for Classification of Semi-Dark Images

open access: yesApplied Sciences, 2021
Image classification of a visual scene based on visibility is significant due to the rise in readily available automated solutions. Currently, there are only two known spectrums of image visibility i.e., dark, and bright.
Mehak Maqbool Memon   +4 more
doaj   +1 more source

Efeito da luz e da quebra de dormência na germinação de sementes de espécies de plantas daninhas Effect of light and dormancy break on weed species seed germination

open access: yesPlanta Daninha, 2007
Objetivou-se com este trabalho verificar a quebra de dormência, utilizando ácido sulfúrico (H2SO4) e escarificação mecânica, e o efeito da luz na germinação das espécies Euphorbia heterophylla, Ipomoea nil, Sida glaziovii e Brachiaria plantaginea.
F.L. Salvador   +4 more
doaj   +1 more source

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