dwarf star

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dwarf star:

see white dwarfwhite dwarf,
in astronomy, a type of star that is abnormally faint for its white-hot temperature (see mass-luminosity relation). Typically, a white dwarf star has the mass of the sun and the radius of the earth but does not emit enough light or other radiation to be easily
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dwarf star

(dwarf) Any star lying on the main sequence of the Hertzsprung–Russell diagram. The term arises from the early dual classification of stars into giants (g) and dwarfs (d ): the Sun was classified as d G2. This system has been superseded by that of luminosity classes (see spectral types), and these ‘dwarf’ stars are of luminosity class V. The term main-sequence star is now more common, especially to prevent confusion with white dwarfs; late-type main-sequence stars, however, are still referred to as red dwarfs.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Dwarf Star


a star of relatively small size and low luminosity. Most dwarf stars form the lower part of the main sequence of the Hertzsprung-Russell diagram. Their average density ranges from 1 to 60 g/cm3. Evidently, all stars of average and small mass are dwarf stars at a certain stage in their evolution, which is characterized by the start of nuclear reactions and the burning of hydrogen in the star’s nucleus. In addition, dwarfs include stars existing in a state of gravitational contraction for a long time because of their very small mass. Dwarf stars have well-developed convection zones and extended chromospheres; therefore, emission lines are encountered in their spectra. A typical dwarf star is our sun. Among dwarfs there are a considerable number of stars with variable characteristics. A large part of the spherical subsystem of the Milky Way Galaxy and of the planar subsystem excluding the spiral arms consists of dwarf stars. The white dwarfs considerably differ in their structure from ordinary (or red) dwarfs.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

dwarf star

[¦dwȯrf ′stär]
A star that typically has surface temperature of 5730 K, radius of 428,000 miles (690,000 kilometers), mass of 2 × 1033 grams, and luminosity of 4 × 1033 ergs per second. Also known as main sequence star.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The scientists calculated that elliptical galaxies have more red dwarf stars than predicted.
But in recently published research, a team of astronomers at The Ohio State University showed that the survey, nicknamed TESS, could also be used to monitor a particular type of supernova, giving scientists more clues about what causes white dwarf stars to explode -- and about the elements those explosions leave behind.
Pier-Emmanuel Tremblay from the University of Warwick's Department of Physics and largely based on observations taken with the European Space Agency's Gaia satellite, has led scientists to speculate that white dwarf stars may be billions of years older than previously believed.
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The study, titled "Two planetary systems with transiting Earth-size and super-Earth planets orbiting late-type dwarf stars," will be published in the Monthly Notices of the magazine Royal Astronomical Society and the (https://arxiv.org/abs/1806.01181) arXiv preprint of the paper is available online.
There are six types of dwarf stars: red, yellow, blue white, black and brownaour sun is a yellow dwarf.
London, June 3 ( ANI ): A new study has revealed that ruthless space weather might damage the atmosphere of any planet in the red dwarf star's habitable zone trajectory.
RED Dwarf star Daniel John-Jules was arrested yesterday on suspicion of attacking two bin men with a samurai sword.
Burns, Stare Green, Cannon Park, Coventry' Marie Foulstone, Dymond Road, Holbrooks, Coventry, have won a copy of the It2i2 DVD starring and signed by Red Dwarf star Robert Llewellyn.