Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
 

S-type star

+ Save concept

An S-type star (or just S star) is a cool giant with approximately equal quantities of carbon and oxygen in its atmosphere. [1]

58 relations: Asymptotic giant branch, Balmer series, Barium, Barium star, BD Camelopardalis, BH Crucis, Binary star, Carbon, Carbon monoxide, Carbon star, Chi Cygni, Convection, Dredge-up, Forsterite, Galactic Center, Galactic plane, Giant star, Helium flash, Hydrogen spectral series, Infrared excess, Iron, Lanthanum, Long-period variable star, Mass transfer, Mira variable, Omicron1 Orionis, Oxygen, Paul W. Merrill, Period 5 element, Pi1 Gruis, R Andromedae, R Cygni, R Geminorum, Red-giant branch, RR Andromedae, S-process, Semiregular variable star, Silicate, Silicon carbide, Slow irregular variable, Sodium, Spectral bands, Spectral line, Stellar classification, Stellar wind, Strontium, Symbiotic binary, Technetium, Technetium star, Titanium carbide, ..., Titanium dioxide, Titanium(II) oxide, Vanadium, W Aquilae, X Andromedae, Yttrium, Zirconium, Zirconium carbide. Expand index (8 more) »

Asymptotic giant branch

The asymptotic giant branch (AGB) is a region of the Hertzsprung–Russell diagram populated by evolved cool luminous stars.

New!!: S-type star and Asymptotic giant branch · See more »

Balmer series

The Balmer series or Balmer lines in atomic physics, is the designation of one of a set of six named series describing the spectral line emissions of the hydrogen atom.

New!!: S-type star and Balmer series · See more »

Barium

Barium is a chemical element with symbol Ba and atomic number 56.

New!!: S-type star and Barium · See more »

Barium star

Barium stars are spectral class G to K giants, whose spectra indicate an overabundance of s-process elements by the presence of singly ionized barium, Ba II, at λ 455.4 nm.

New!!: S-type star and Barium star · See more »

BD Camelopardalis

BD Camelopardalis is an S star and symbiotic star in the constellation Camelopardalis.

New!!: S-type star and BD Camelopardalis · See more »

BH Crucis

BH Crucis, also known as Welch's Red Variable, is a star in the constellation Crux.

New!!: S-type star and BH Crucis · See more »

Binary star

A binary star is a star system consisting of two stars orbiting around their common barycenter.

New!!: S-type star and Binary star · See more »

Carbon

Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.

New!!: S-type star and Carbon · See more »

Carbon monoxide

Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.

New!!: S-type star and Carbon monoxide · See more »

Carbon star

A carbon star is typically an asymptotic giant branch star, a luminous red giant, whose atmosphere contains more carbon than oxygen; the two elements combine in the upper layers of the star, forming carbon monoxide, which consumes all the oxygen in the atmosphere, leaving carbon atoms free to form other carbon compounds, giving the star a "sooty" atmosphere and a strikingly ruby red appearance.

New!!: S-type star and Carbon star · See more »

Chi Cygni

Chi Cygni (χ Cyg, χ Cygni) is a variable star of the Mira type in the constellation Cygnus, and also an S-type star.

New!!: S-type star and Chi Cygni · See more »

Convection

Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock (rheid).

New!!: S-type star and Convection · See more »

Dredge-up

A dredge-up is a period in the evolution of a star where a surface convection zone extends down to the layers where material has undergone nuclear fusion.

New!!: S-type star and Dredge-up · See more »

Forsterite

Forsterite (Mg2SiO4; commonly abbreviated as Fo) is the magnesium-rich end-member of the olivine solid solution series.

New!!: S-type star and Forsterite · See more »

Galactic Center

The Galactic Center is the rotational center of the Milky Way.

New!!: S-type star and Galactic Center · See more »

Galactic plane

The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies.

New!!: S-type star and Galactic plane · See more »

Giant star

A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.

New!!: S-type star and Giant star · See more »

Helium flash

A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low mass stars (between 0.8 solar masses and 2.0) during their red giant phase (the Sun is predicted to experience a flash 1.2 billion years after it leaves the main sequence).

New!!: S-type star and Helium flash · See more »

Hydrogen spectral series

The emission spectrum of atomic hydrogen is divided into a number of spectral series, with wavelengths given by the Rydberg formula.

New!!: S-type star and Hydrogen spectral series · See more »

Infrared excess

An infrared excess is a measurement of an astronomical source, typically a star, that in their spectral energy distribution has a greater measured infrared flux than expected by assuming the star is a blackbody radiator.

New!!: S-type star and Infrared excess · See more »

Iron

Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

New!!: S-type star and Iron · See more »

Lanthanum

Lanthanum is a chemical element with symbol La and atomic number 57.

New!!: S-type star and Lanthanum · See more »

Long-period variable star

The descriptive term long-period variable star refers to various groups of cool luminous pulsating variable stars.

New!!: S-type star and Long-period variable star · See more »

Mass transfer

Mass transfer is the net movement of mass from one location, usually meaning stream, phase, fraction or component, to another.

New!!: S-type star and Mass transfer · See more »

Mira variable

Mira variables ("Mira", Latin, adj. - feminine form of adjective "wonderful"), named for the prototype star Mira, are a class of pulsating variable stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.

New!!: S-type star and Mira variable · See more »

Omicron1 Orionis

Omicron1 Orionis (ο1 Ori) is a binary star in the northeastern corner of the constellation Orion.

New!!: S-type star and Omicron1 Orionis · See more »

Oxygen

Oxygen is a chemical element with symbol O and atomic number 8.

New!!: S-type star and Oxygen · See more »

Paul W. Merrill

Paul Willard Merrill (August 15, 1887 – July 19, 1961) was an American astronomer whose specialty was spectroscopy.

New!!: S-type star and Paul W. Merrill · See more »

Period 5 element

A period 5 element is one of the chemical elements in the fifth row (or period) of the periodic table of the elements.

New!!: S-type star and Period 5 element · See more »

Pi1 Gruis

π1 Gruis (Pi1 Gruis) is a semiregular variable star in the constellation Grus around 530 light-years from Earth.

New!!: S-type star and Pi1 Gruis · See more »

R Andromedae

R Andromedae (R And) is a Mira-type variable star in the constellation Andromeda.

New!!: S-type star and R Andromedae · See more »

R Cygni

R Cygni is a variable star of the Mira type in the constellation Cygnus.

New!!: S-type star and R Cygni · See more »

R Geminorum

R Geminorum (R Gem) is a Mira variable and technetium star in the constellation Gemini.

New!!: S-type star and R Geminorum · See more »

Red-giant branch

The red-giant branch (RGB), sometimes called the first giant branch, is the portion of the giant branch before helium ignition occurs in the course of stellar evolution.

New!!: S-type star and Red-giant branch · See more »

RR Andromedae

RR Andromedae is a variable star in the constellation of Andromeda.

New!!: S-type star and RR Andromedae · See more »

S-process

The slow neutron-capture process or s-process is a series of reactions in nuclear astrophysics that occur in stars, particularly AGB stars.

New!!: S-type star and S-process · See more »

Semiregular variable star

Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities.

New!!: S-type star and Semiregular variable star · See more »

Silicate

In chemistry, a silicate is any member of a family of anions consisting of silicon and oxygen, usually with the general formula, where 0 ≤ x Silicate anions are often large polymeric molecules with an extense variety of structures, including chains and rings (as in polymeric metasilicate), double chains (as in, and sheets (as in. In geology and astronomy, the term silicate is used to mean silicate minerals, ionic solids with silicate anions; as well as rock types that consist predominantly of such minerals. In that context, the term also includes the non-ionic compound silicon dioxide (silica, quartz), which would correspond to x.

New!!: S-type star and Silicate · See more »

Silicon carbide

Silicon carbide (SiC), also known as carborundum, is a semiconductor containing silicon and carbon.

New!!: S-type star and Silicon carbide · See more »

Slow irregular variable

A slow irregular variable (ascribed the GCVS types L, LB and LC) is a variable star that exhibit no or very poorly defined periodicity in their slowly changing light emissions.

New!!: S-type star and Slow irregular variable · See more »

Sodium

Sodium is a chemical element with symbol Na (from Latin natrium) and atomic number 11.

New!!: S-type star and Sodium · See more »

Spectral bands

Spectral bands are part of optical spectra of polyatomic systems, including condensed materials, large molecules, etc.

New!!: S-type star and Spectral bands · See more »

Spectral line

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.

New!!: S-type star and Spectral line · See more »

Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

New!!: S-type star and Stellar classification · See more »

Stellar wind

A stellar wind is a flow of gas ejected from the upper atmosphere of a star.

New!!: S-type star and Stellar wind · See more »

Strontium

Strontium is the chemical element with symbol Sr and atomic number 38.

New!!: S-type star and Strontium · See more »

Symbiotic binary

A symbiotic binary is a type of binary star system, often simply called a symbiotic star.

New!!: S-type star and Symbiotic binary · See more »

Technetium

Technetium is a chemical element with symbol Tc and atomic number 43.

New!!: S-type star and Technetium · See more »

Technetium star

A technetium star, or more properly a Tc-rich star, is a star whose stellar spectrum contains absorption lines of the light radioactive metal technetium.

New!!: S-type star and Technetium star · See more »

Titanium carbide

Titanium carbide, TiC, is an extremely hard (Mohs 9–9.5) refractory ceramic material, similar to tungsten carbide.

New!!: S-type star and Titanium carbide · See more »

Titanium dioxide

Titanium dioxide, also known as titanium(IV) oxide or titania, is the naturally occurring oxide of titanium, chemical formula.

New!!: S-type star and Titanium dioxide · See more »

Titanium(II) oxide

Titanium(II) oxide (TiO) is an inorganic chemical compound of titanium and oxygen.

New!!: S-type star and Titanium(II) oxide · See more »

Vanadium

Vanadium is a chemical element with symbol V and atomic number 23.

New!!: S-type star and Vanadium · See more »

W Aquilae

W Aquilae (W Aql / SAO 143184 / GC 2525) is a variable star in the constellation of Aquila.

New!!: S-type star and W Aquilae · See more »

X Andromedae

X Andromedae is a variable star in the constellation of Andromeda.

New!!: S-type star and X Andromedae · See more »

Yttrium

Yttrium is a chemical element with symbol Y and atomic number 39.

New!!: S-type star and Yttrium · See more »

Zirconium

Zirconium is a chemical element with symbol Zr and atomic number 40.

New!!: S-type star and Zirconium · See more »

Zirconium carbide

Zirconium carbide (ZrC) is an extremely hard refractory ceramic material, commercially used in tool bits for cutting tools.

New!!: S-type star and Zirconium carbide · See more »

Redirects here:

Extrinsic S star, Extrinsic S-type star, Intrinsic S star.

References

[1] https://en.wikipedia.org/wiki/S-type_star

OutgoingIncoming
Hey! We are on Facebook now! »