Red dwarf
This article is about red dwarfs, the type of star. Red Dwarf is also the name of a British television series.
Red Dwarf
Red dwarfs are small (0.08-0.5 M⊙), low-surface temperature (2500-4000 K) Main Sequence stars with a spectral type of K or M. It is their low temperature which dictates their red appearance.
Red Dwarfs
A small, relatively cool star of the main sequence. Red dwarfs constitute the majority of stars and have a mass of less than one-half of the Sun.
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Red dwarf stars within 10 parsecs
Larger map.
Today, over 260 red dwarf stars
are known to be located within
10 parsecs (pc) of Sol.
Red dwarf
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A red dwarf is a small, cool, very faint, main sequence star with a surface temperature under about 4,000 K. Red dwarves are the most common type of star.
Red dwarf
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red dwarf Small, cool faint star at the lower-right end of the main sequence on the Hertzsprung-Russell diagram.
red giant A giant star whose surface temperature is relatively low, so that it glows with a red color.
RED DWARF - Small, dim, low-mass main sequence star. Red dwarf stars are hard to detect because they are so dim.
red dwarf
a low-mass, main-sequence star much smaller, cooler, and less luminous than the sun
red giant ...
Red Dwarfs
Red dwarfs are small stars that never really managed to get fired up. With masses of about 40% that of our sun, they are relatively cool, with a surface temperature of less than 3,200C, so they have a dimmer, reddish appearance.
Red Dwarf
A main-sequence star with spectral type M. Red dwarfs are much fainter, cooler, and smaller than the Sun but are the most common type of star in the Galaxy, accounting for 70 percent of all stars.
Red Dwarf: Cool, low mass star on the lower main sequence.
Redshift: The shift of all the spectral lines toward longer wavelengths due to the object's recession as seen from the Earth, this recession, at great distances, ...
Red dwarf -- A small star, on the order of 100 times the mass of Jupiter.
Reflection -- The deflection or bouncing of electromagnetic waves when they encounter a surface.
Red dwarf. A star that is smaller and cooler than the Sun. Most red dwarfs are about one-tenth the mass and diameter of the Sun.
Red Dwarf is a United Kingdom science fiction television situation comedy Media franchise, primarily comprising eight series of a television sitcom that ran on BBC Two between 1988 and 1999 and gained a cult following....
star which is a scant 20.
Red dwarfs are small and dim compared to stars like our Sun, and as a result are difficult to detect.
Red Dwarf Star (Main Sequence). Once thought to be the most abundant type of star in the galaxy but surprisingly found to be very rare. Unsolved Mystery.
How Far Away:
25 light years away ...
Red dwarfs are the only active (undergoing hydrogen fusion) type of dwarf (other types are brown, white, and black). Red dwarfs range between 1/3 and 1/12 the sun's mass, and shine only 1/100 to 1/1,000,000 as brightly.
Red Dwarf Star Systems
Resonances -- Solar System
Rising & Setting Times -- Solar System Objects & Stars ...
Red Dwarf
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Red dwarf: Small main sequence star.
Red giant: The phase of a star when all the core hydrogen is used up and the star becomes enlarged. It cycles between shell burning and core burning of successivly heavier elements, up to iron.
11. Red dwarfs lie in the lower left part of the H-R diagram. (Hint)
12. The brightest stars visible in the night sky are all found in the upper part of the H-R diagram. (Hint) ...
(a) Dim red dwarf star that suddenly lights up with great - but brief - luminosity, corresponding to an equally powerful but short-lived burst of radio emission.
This is a red dwarf, with a visual magnitude of only 9.5, and consequently not easily found. Burnham has a finder's chart, page 1253, but since that chart was published the star has moved north 1.1 centimetres.
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red dwarf stars (NASA Thesaurus) Red stars of low luminosity, so designated by E. Hertzsprung. Red Dwarf stars are commonly those main sequence stars fainter than an absolute magnitude of plus 1, and are the faintest and coolest of the dwarfs.
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336. Red Dwarf
Cool, low mass stars on the lower main sequence.
In the TV series Red Dwarf, and also in the Red Dwarf book Backwards, the crew happen upon a reality where time is traveling backwards.
Wolf 359 This red dwarf star in the constellation Leo is the weakest light producer among our neighbors and it is one of the dimmest stars known.
Small stars (called red dwarfs) burn their fuel very slowly and last tens to hundreds of billions of years (far longer than the time elapsed in the universe so far).
Stars that are at extremes fascinate: high mass ones that may be ready to blow up, like Betelgeuse, Antares, Eta Carinae, and so many others; low mass feeble red dwarfs like Proxima Centauri that produce occasional flares; ...
The same lensing calculations also apply locally, forming the heart of several massive projects aimed at seeing what the contribution of white dwarfs, red dwarfs, brown dwarfs, and loose "rogue" planets is to the Milky Way's mass.
Even closer lies Proxima Cen, a red dwarf of 11th mag, the closest star to our our sun. Proxima Cen is about 2 degrees apart from its brighter companions.
To split the pair gamma Cen telescopes with an aperture of at least 300mm are necessary.
Some of the optical features of AM Her's light curve are explainable in terms of the red dwarf secondary. First, the red dwarf is distorted into an egg-shape by the attraction of its companion, toward which the long axis of the egg points.
55 Cancri consists of a yellow dwarf and a smaller red dwarf, with five planets orbiting the primary star; one terrestrial planet and four gas giants. It is the only planetary system discovered to have five planets and possibly more.
The first image of a MACHO - in this case a red dwarf star - indicated by the arrow to the upper left of the more distant blue background star.
Here are some sentences off the abstract: "Unfortunately, standard four-color photometry does not distinguish between red dwarfs and giants. ... Every star of the correct spectral type and magnitude must be scrutinized. ...
The stars in the lower right corner of the main sequence are frequently called red dwarfs, and the stars between the main sequence and the giant branch are called subgiants.
Red dwarfs are so cool, that any planets harboring any kind of life would have to be very close to the star.
The red dwarf Proxima Centauri, the closest star to the solar system, would appear to be magnitude 15.6, the tiniest little glimmer visible in a 16-inch telescope! ...
Since stars become more common as they get smaller, then it's logical that brown dwarves should be even more common than the numerous little red dwarf stars that litter up our Galaxy, ...
EZ Aquarii is actually a triple system of red dwarf stars.
61 Cygni was the first star successfully observed for parallax. Friedrich Wilhelm Bessel (1784 - 1846) measured the parallax between 1837 and 1840.
Alpha centauri is a bright binary star system with the faint red dwarf star Proxima bound to them by gravity.
Beta Centauri known as Hader is also a bright star in the southern sky. It is a first magnitude star.
Apart from the Sun, currently the closest star to us is a small red dwarf M5 class star, Proxima Centauri. It has a parallax of 0.772". Therefore its distance is:
d = 1/p
so d = 1/0.772
∴ d = 1.30 pc ...
As we enter the near-infrared region, the hot blue stars seen clearly in visible light fade out and cooler stars come into view. Large red giant stars and low mass red dwarfs dominate in the near-infrared.
These stars are faint, small, and red, so they tend to be referred to as red dwarfs. While these are not the brightest stars out there, they are the most common. K and M types easily outnumber the O and B types by a wide margin.
After the sun the next nearest star is a red dwarf called Proxima Centauri which is over 250,000 times the distance away. If you were to travel out to Proxima Centauri and look back at the sun you would see it as a small faint yellow star.
The searches have so far focussed on stars similar to the Sun, though a couple of systems have planets orbiting a pulsar (a type of ultra-compact, dead star discussed in the stellar evolution chapter), six systems have M-type red dwarf stars ...
o2 Eridani is a wide double star containing - its fainter component is actually a close dougle itself composed of low mass 10.8 mag. red dwarf and 9.7 mag. white dwarf.
Smaller stars, such as red dwarfs, burn their fuel so slowly that they can live for trillions of years. Our Sun is believed to be about 4.5 billion years old. It should shine for about another 5 billion years.
 See also: Dwarf, Star, Light, Sun, Earth
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