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Luminous blue variable

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Luminous blue variables (LBVs) are massive evolved stars that show unpredictable and sometimes dramatic variations in both their spectra and brightness. [1]

72 relations: AE Andromedae, AFGL 2298, AG Carinae, Allan Sandage, Alpha Cygni variable, BD+40° 4210, Centre de données astronomiques de Strasbourg, Cepheid variable, Chandra X-ray Observatory, Cygnus OB2, Cygnus OB2-12, Delta Scuti, Delta Scuti variable, Edwin Hubble, Eta Carinae, General Catalogue of Variable Stars, HD 160529, HD 168607, HD 168625, HD 5980, Hertzsprung–Russell diagram, HR Carinae, Hypergiant, IRC +10420, Large Magellanic Cloud, LBV 1806-20, List of most luminous stars, Messier 81, Monthly Notices of the Royal Astronomical Society, Nebula, NGC 2403, NGC 3603, P Cygni, Pair-instability supernova, Pinwheel Galaxy, Pistol Star, Quintuplet cluster, R85, R99, Red giant, Red supergiant star, Rho Cassiopeiae, Romano's Star, S Doradus, Sanduleak -69 202, Sher 25, SN 1961V, SN 1987A, SN 2005gl, SN 2009ip, ..., Solar mass, Stellar association, Stellar evolution, Stellar nucleosynthesis, Supergiant star, Superluminous supernova, Supernova, Supernova impostor, Triangulum Galaxy, Triple-alpha process, V1429 Aquilae, V4650 Sagittarii, V4998 Sagittarii, V509 Cassiopeiae, Var 83, Westerlund 1, Wide-field Infrared Survey Explorer, Wolf–Rayet star, WR 102ka, Wray 17-96, Yellow hypergiant, Zeta1 Scorpii. Expand index (22 more) »

AE Andromedae

AE Andromedae (AE And) is a luminous blue variable (LBV), a type of variable star.

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AFGL 2298

AFGL 2298, also known as IRAS 18576+0341, is a luminous blue variable star (LBV) located in the constellation Aquila, very close to the galactic plane.

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AG Carinae

AG Carinae (AG Car) is a star in the constellation Carina.

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Allan Sandage

Allan Rex Sandage (June 18, 1926 – November 13, 2010) was an American astronomer.

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Alpha Cygni variable

Alpha Cygni variables are variable stars which exhibit non-radial pulsations, meaning that some portions of the stellar surface are contracting at the same time others parts expand.

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BD+40° 4210

BD+40° 4210 is a hot luminous giant star located in the constellation Cygnus.

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Centre de données astronomiques de Strasbourg

The Centre de Données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.

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Cepheid variable

A Cepheid variable is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude.

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Chandra X-ray Observatory

The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a Flagship-class space observatory launched on STS-93 by NASA on July 23, 1999.

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Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

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Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

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Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

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Christmas traditions

Christmas traditions vary from country to country.

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Cygnus OB2

Cygnus OB2 is an OB association that is home to some of the most massive and most luminous stars known, including suspected Luminous blue variable Cyg OB2 #12.

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Cygnus OB2-12

Cygnus OB2 #12 is an extremely bright blue hypergiant with an absolute bolometric magnitude (all electromagnetic radiation) of −10.9, among the most luminous stars known in the galaxy.

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Delta Scuti

Delta Scuti (δ Sct, δ Scuti) is a giant star in the southern constellation Scutum.

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Delta Scuti variable

A Delta Scuti variable (sometimes termed dwarf cepheid) is a variable star which exhibits variations in its luminosity due to both radial and non-radial pulsations of the star's surface.

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Edwin Hubble

Edwin Powell Hubble (November 20, 1889 – September 28, 1953) was an American astronomer.

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Eta Carinae

Eta Carinae (η Carinae, abbreviated to η Car), formerly known as Eta Argus, is a stellar system containing at least two stars with a combined luminosity greater than five million times that of the Sun, located around 7,500 light-years (2,300 parsecs) distant in the constellation Carina.

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General Catalogue of Variable Stars

The General Catalogue of Variable Stars (GCVS) is a list of variable stars.

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HD 160529

HD 160529 (V905 Sco) is a Luminous Blue Variable (LBV) star located in the constellation of Scorpius.

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HD 168607

HD 168607 (V4029 Sgr) is a blue hypergiant and luminous blue variable (LBV) star located in the constellation of Sagittarius, easy to see with amateur telescopes.

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HD 168625

HD 168625 (V4030 Sgr) is a blue hypergiant and candidate luminous blue variable located in the constellation of Sagittarius easy to see with amateur telescopes.

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HD 5980

HD 5980 is a multiple star system in NGC 346 in the Small Magellanic Cloud (SMC) and is one of the brightest stars in the SMC.

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Hertzsprung–Russell diagram

The Hertzsprung–Russell diagram, abbreviated H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

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HR Carinae

HR Carinae is a luminous blue variable star located in the constellation Carina.

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Hypergiant

A hypergiant (luminosity class 0 or Ia+) is among the very rare kinds of stars that typically show tremendous luminosities and very high rates of mass loss by stellar winds.

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IRC +10420

IRC+10420, also known as V1302 Aql, is a yellow hypergiant star located in the constellation of Aquila at a distance of 4-6 kiloparsecs of the Sun.

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Large Magellanic Cloud

The Large Magellanic Cloud (LMC) is a satellite galaxy of the Milky Way.

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LBV 1806-20

LBV 1806-20 is a candidate luminous blue variable (LBV) and likely binary star located nearly 40,000 light-years from the Sun, towards the center of the Milky Way.

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List of most luminous stars

Below is a list of stars arranged in order of decreasing luminosity (increasing bolometric magnitude).

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Messier 81

Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a spiral galaxy about 12 million light-years away, in the constellation Ursa Major.

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Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.

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Nebula

A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

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NGC 2403

NGC 2403 (also Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis.

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NGC 3603

NGC 3603 is a nebula situated in the Carina spiral arm of the Milky Way around 20,000 light-years away from the Solar System.

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New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

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New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

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New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

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P Cygni

P Cygni (34 Cyg) is a variable star in the constellation Cygnus.

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Pair-instability supernova

A pair-instability supernova occurs when pair production, the production of free electrons and positrons in the collision between atomic nuclei and energetic gamma rays, temporarily reduces the internal pressure supporting a supermassive star's core against gravitational collapse.

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Pinwheel Galaxy

The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (six megaparsecs) away from Earth in the constellation Ursa Major.

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Pistol Star

The Pistol Star is a blue hypergiant star, one of the most luminous known in the Milky Way.

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Quintuplet cluster

The Quintuplet cluster is a dense cluster of massive young stars about 100 light years from the Galactic Center (GC).

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R85

R85 (or RMC 85, after the Radcliffe Observatory Magellanic Clouds catalog) is a luminous blue variable located in the LH-41 OB association in the Large Magellanic Cloud.

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R99

R99 (HD 269445) is a star in the Large Magellanic Cloud in the constellation Dorado.

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Red giant

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.

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Red supergiant star

Red supergiants are stars with a supergiant luminosity class (Yerkes class I) of spectral type K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous.

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Rho Cassiopeiae

Rho Cassiopeiae (ρ Cas, ρ Cassiopeiae) is a yellow hypergiant star in the constellation Cassiopeia.

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Romano's Star

Romano's Star (GR 290) is a luminous blue variable star located in the Messier 33 galaxy in the constellation of Triangulum.

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S Doradus

S Doradus (also known as S Dor) is located 160,000 light years away, and is one of the brightest stars in the Large Magellanic Cloud (LMC), a satellite of the Milky Way.

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Sanduleak -69 202

Sanduleak -69 202 (Sk -69 202, also known as GSC 09162-00821) was a magnitude 12 blue supergiant star, located on the outskirts of the Tarantula Nebula in the Large Magellanic Cloud.

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Sher 25

Sher 25 is a blue supergiant star in the constellation Carina, located approximately 25,000 light years from the Sun in the H II region NGC 3603 of the Milky Way.

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SN 1961V

SN 1961V was an abnormal, supernova-like event that was a potential supernova impostor. The potential impostor nature of SN 1961V was first identified by Fritz Zwicky in 1964. SN 1961V occurred in galaxy NGC 1058, about 9.3 Mpc away (about 30 million light years). Unlike many supernovae, the progenitor star is tentatively known: an extremely large, very bright blue star, similar to Eta Carinae. Mass estimates of the precursor star were as high as 2000 times the mass of the sun, but these are likely to be extreme overestimates. If SN 1961V was not a supernova then it was most likely an extremely large outburst by a luminous blue variable star. The remnant of SN 1961V's explosion is expanding at 2,000 km/s, which is much slower than the majority of supernovae. The profile of its light curve, with a gradual climb to maximum brightness, was unusual when compared to a supernova. This unusual light curve led to suspicion that it was some other event. If the star survived this would identify SN 1961V as an impostor supernova rather than a true supernova. Attempts to determine if the progenitor star is still present have been extensive and have included use of both the Hubble Space Telescope and the Spitzer Space Telescope. These attempts have been hampered by the cloud of debris from the event, which have left the area obscured. Christopher Kochanek at Ohio State University has compared the event to the confirmed supernova SN 2005gl and suggested that the low velocity of expansion can be explained by a pre-supernova mass loss event similar to that which was observed to occur in SN 2005gl. The analysis by Kochanek's group strongly suggests that SN 1961V was indeed a genuine supernova. Almost at the same moment, another team detected a highly luminous blue star, labeled Object 7, remaining at the site of the supernova, although they couldn't rule out this being a surviving companion of the exploded star.

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SN 1987A

SN 1987A was a peculiar type II supernova in the Large Magellanic Cloud, a dwarf galaxy satellite of the Milky Way.

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SN 2005gl

SN 2005gl was a supernova in the barred-spiral galaxy NGC 266.

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SN 2009ip

SN 2009ip was a supernova discovered in 2009 in the spiral galaxy NGC 7259 in the constellation of Piscis Austrinus.

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Solar mass

The solar mass is a standard unit of mass in astronomy, equal to approximately.

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Stellar association

A stellar association is a very loose star cluster, looser than both open clusters and globular clusters.

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Stellar evolution

Stellar evolution is the process by which a star changes over the course of time.

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Stellar nucleosynthesis

Stellar nucleosynthesis is the theory explaining the creation (nucleosynthesis) of chemical elements by nuclear fusion reactions between atoms within the stars.

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Supergiant star

Supergiants are among the most massive and most luminous stars.

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Superluminous supernova

A superluminous supernova (SLSN, plural superluminous supernovae or SLSNe; also known as hypernova) is a type of stellar explosion with a luminosity 10 or more times higher than that of standard supernovae.

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Supernova

A supernova (plural: supernovae or supernovas, abbreviations: SN and SNe) is a transient astronomical event that occurs during the last stellar evolutionary stages of a star's life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.

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Supernova impostor

Supernova impostors are stellar explosions that appear at first to be a type of supernova but do not destroy their progenitor stars.

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Triangulum Galaxy

The Triangulum Galaxy is a spiral galaxy approximately 3 million light-years (ly) from Earth in the constellation Triangulum.

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Triple-alpha process

The triple-alpha process is a set of nuclear fusion reactions by which three helium-4 nuclei (alpha particles) are transformed into carbon.

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V1429 Aquilae

V1429 Aquilae is a candidate luminous blue variable multiple star system located in the constellation of Aquila.

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V4650 Sagittarii

V4650 Sagittarii (qF362) is a luminous blue variable star (LBV) in the constellation of Sagittarius.

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V4998 Sagittarii

V4998 Sagittarii is a luminous blue variable star (LBV) in the constellation of Sagittarius.

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V509 Cassiopeiae

V509 Cassiopeiae (V509 Cas or HR 8752) is one of two yellow hypergiant stars found in the constellation Cassiopeia, which also contains Rho Cassiopeiae.

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Var 83

VHK 83 (Var 83 in the VHK survey) is a luminous blue variable (LBV) in the constellation Triangulum, in the Triangulum Galaxy.

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Westerlund 1

Westerlund 1 (abbreviated Wd1, sometimes called Ara Cluster) is a compact young super star cluster in the Milky Way galaxy, about 3.5–5 kpc away from Earth.

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Wide-field Infrared Survey Explorer

Wide-field Infrared Survey Explorer (WISE) is a NASA infrared-wavelength astronomical space telescope launched in December 2009, and placed in hibernation in February 2011.

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Wolf–Rayet star

Wolf–Rayet stars, often abbreviated as WR stars, are a rare heterogeneous set of stars with unusual spectra showing prominent broad emission lines of highly ionised helium and nitrogen or carbon.

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WR 102ka

WR 102ka, also known as the Peony star, is a Wolf–Rayet star that is one of several candidates for the most luminous-known star in the Milky Way.

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Wray 17-96

Wray 17-96 is a very luminous star in the Scorpius constellation, about away.

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Yellow hypergiant

A yellow hypergiant is a massive star with an extended atmosphere, a spectral class from A to K, and an initial mass of about 20–60 solar masses but having lost as much as half that mass.

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Zeta1 Scorpii

Zeta1 Scorpii (Zeta1 Sco, ζ1 Scorpii, ζ1 Sco) is a B-type hypergiant star in the constellation of Scorpius.

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2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

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2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

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Redirects here:

CLBV, HD 269700, Hubble-Sandage variable, Hubble–Sandage variable, Luminous Blue Variable, Luminous Blue Variables, Luminous blue varaible, Luminous blue variable star, P Cygni variable, S Dor variable, S Doradus variable.

References

[1] https://en.wikipedia.org/wiki/Luminous_blue_variable

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