R Coronae Australis
S. Van Dyk, IPAC (2MASS Atlas Image Gallery)
Herbig Ae/Be star, R Coronae Australis -- larger image.
(See a Digitized Sky Survey image of R CrA from
the Nearby Stars Database.) ...
Rho Coronae Borealis (ρ CrB / ρ Coronae Borealis) is a 6th magnitude star in the constellation of Corona Borealis. It is, like our Sun, a yellow dwarf (spectral type G0 V or G2 V) and only slightly brighter.
Kappa Coronae Borealis
(The Planet Project)
Kappa Corona Borealis used to be a much hotter class A star, ...
Alphekka (Alpha Coronae Borealis)
Map 2003 Torsten Bronger
Also known as Gemma, the brightest star in the constellation Corona Borealis.
Coronae
On Venus, circular features, not caused by impacts, they are domed plains caused by the rising plumes of molten rock from below.
Coronagraph ...
R Coronae Borealis Stars
Unlike most variable stars, R Coronae stars spend most of their time at maximum brightness but sometimes decrease in brightness by up to 9 magnitudes at irregular intervals.
R Coronae Borealis Stars
A class of very luminous helium-rich, carbon-rich, hydrogen-poor eruptive variable supergiants. The prototype is R CrB, an F8-G0 Ib star with a large infrared excess and a rather high 7Li abundance.
Coronae. Coronae (Figure 21) are common on Venus and may be another consequence of the action of diapirs. They consist of circular to oval patterns of faults, fractures, and ridges and, like novae, are typically a few hundred kilometres in diameter.
Coronae
Pancake volcanoes
Magellan's images show a wide variety of interesting and unique features including pancake volcanoes (left) which seem to be eruptions of very thick lava and coronae (right) which seem to be collapsed domes over ...
Coronae (ovoid-shaped features) are named after fertility and Earth goddesses.
Coronae are easiest to see around the moon, because the moon is not too bright to look at, but occur just as commonly around the sun, where they are much brighter and potentially more spectacular.
R Coronae Australis lies 420 light years away in the heart of a star formation region in the constellation Corona Australis.
T Coronae Borealis, also known as Blaze Star, is a spectroscopic binary star with a red giant component. It is a recurrent nova that usually has a magnitude of 10.8, but reaches magnitude 2 or 3 when it erupts, as it did in 1866 and 1946.
R Coronae Borealis (R CrB) is the prototype star. Other examples include Z Ursae Minoris (Z UMi) and SU Tauri (SU Tau). DY Persei variables are a subclass of R CrB variables that have a periodic variability in addition to their eruptions.
The coronae of active stars
We can learn a lot more from the than from the continuum.
* The chemical composition of stars ...
Alpha Coronae Borealis
Arabic: "bright one of the dish" (Latin: gem)
2.22 ...
Both alpha Coronae Borealis and beta Coronae Borealis are spectroscopic binaries, with periods of 17.36 days and 10.5 years respectively.
Gamma CrB is also a spectroscopic binary (period uncertain) as well as a very close visual binary (see below).
This rich cluster of galaxies is located about 130' SW of b Coronae Borealis (see finder chart below). About 1.5 billion light years distant, it occupies area of the sky almost 1 across! ...
The corona, together with Solar flares, is the source of Solar X-rays. It is the corona, not the photosphere, that is studied by radio astronomers, except at very short wavelengths. [H76]
R Coronae Borealis Stars ...
Alfecca Meridiana Alpha Coronae Australis
Alfirk Beta Cephei
Algedi Alpha Capricorni
Al Giedi Alpha Capricorni
Algenib Alpha Persei
Algieba Gamma Leonis
Algol Beta Persei
Algorab Delta Corvi
Alhajoth Alpha Aurigae
Alhena Gamma Geminorum ...
In physical science, coronae (or "glories") are the coloured rings frequently seen closely encircling the sun or moon. Formerly classified by the ancient Greeks with halos, rainbows, &c.
[24] Their surfaces are heavily cratered, though all of them (except Umbriel) show signs of endogenic resurfacing in the form of lineaments (canyons) and, in the case of Miranda, ovoid race-track like structures called coronae.
Arachnoids are similar in form but generally smaller than coronae (circular volcanic structures surrounded by a set of ridges and grooves as well as radial lines). One theory concerning their origin is that they are a precursor to coronae formation.
Features called coronae are thought to have been caused by an upwelling of mantle material that, for unknown reasons, never developed into full convective motion.
There are strange volcanic structures such as coronae, arachnoids and pancakes located all over the place.
The venusian surface is peppered with volcanoes and roundish terraces called coronae. Coronae are several hundreds miles across and appear to form when hot blobs push and stretch the surface (see Figure 8).
Chamaeleon (Chamaeleontis) Circinus (Circini) Columba (Columbae)--> Coma Berenices (Comae Berenices) Corona Australis (Coronae Australis) Corona Borealis (Coronae Borealis) Corvus (Corvi) Crater (Crateris) Crux ...
Abbreviation: CrA
Genitive: Coronae Austrini
Translation: The Southern Crown
Peoria Astronomical Society Corona Austrina Page
Interactive star chart (Java applet) ...
Corona - A type of surface feature of Uranus's satellite Miranda. Coronae consist of parallel ridges and troughs producing a striped appearance. Coronae have sharp boundaries.
Alphecca; Alphacca; Gemma; Gnosia; The Jewel; Gnosia Stella Coronae; Ashtaroth.
Alpha Coronae Borealis
HR 5793
HD 139006 ...
This might be connected with the idea of Corona Borealis as a floral crown. Gnosia Stella Coronae is the Latin name applied to the star by the Roman poet Virgil in his Georgics composed in the first century C. E.
corona -- A circular to elongate feature which is surrounded by multiple concentric ridges. Coronae are thought to be formed by hot spots.
CORONA2 - Circular to elliptical feature observed on Venus. Although these superficially resemble craters, they consist of deep, curving, trench surrounding an elevated plain. Plural: coronae.
Disks may also generate winds and coronae that could produce some of the observed emission. Finally, if the angular momenta of the central object and accreting gas are misaligned, the disk may twist, precess, or exhibit damped oscillations.
look somewhat like pancakes and range in size from 20-50 km across, and 100-1000 m high; radial, star-like fracture systems called novae; features with both radial and concentric fractures resembling spiders' webs, known as arachnoids; and coronae, ...
 See also: Corona, Light, Solar, Sun, Star
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