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- Alpha_Pavonis abstract "Alpha Pavonis (α Pav) is a star in the southern constellation Pavo, near the shared border with the Telescopium constellation. It is also known by the name Peacock, which was assigned by Her Majesty's Nautical Almanac Office in the late 1930s during the creation of the Air Almanac, a navigational almanac for the Royal Air Force. Of the fifty-seven stars included in the new almanac, two had no classical names: Epsilon Carinae and Alpha Pavonis. The RAF insisted that all of the stars must have names, so new names were invented. Alpha Pavonis was named "Peacock" ('pavo' is Latin for 'peacock') whilst Epsilon Carinae was called "Avior".At an apparent magnitude of 1.94, this is the brightest star in Pavo. Based upon parallax measurements, this star is about 179 light-years (55 parsecs) distant from the Earth. It has an estimated six times the Sun's mass and 5–6 times the Sun's radius, but 2,200 times the luminosity of the Sun. However, Tetzlaff et al. (2011) suggest a much higher mass of 9 times the mass of the Sun. The effective temperature of the photosphere is 18,000 K, which gives the star a blue-white hue. A stellar classification of B2 IV suggests it is a subgiant star that has begun to evolve from the main sequence with the exhaustion of the hydrogen at its core.Stars with the mass of Alpha Pavonis are believed not to have a convection zone near their surface. Hence the material found in the outer atmosphere is not processed by the nuclear fusion occurring at the core. This means that the surface abundance of elements should be representative of the material out of which it originally formed. In particular, the surface abundance of deuterium should not change during the star's main sequence lifetime. The measured ratio of deuterium to hydrogen in this star amounts to less than 5 × 10–6, which suggests this star may have formed in a region with an unusually low abundance of deuterium, or else the deuterium was consumed by some means. A possible scenario for the latter is that the deuterium was burned through while Alpha Pavonis was a pre-main-sequence star.Alpha Pavonis is a spectroscopic binary consisting of a pair of stars that orbit around each other with a period of 11.753 days. However, in part because the two stars have not been individually resolved, little is known about the companion. The system may be a member of the Tucana-Horologium association of stars that share a common motion through space. The estimated age of this association is 30 million years, which, as the members share a common origin, suggests a similar age for Alpha Pavonis. However, Tetzlaff et al. (2011) suggest an age for this star of only 200,000 years. This star has a peculiar velocity of 13 km s–1 relative to its neighbors.".
- Alpha_Pavonis thumbnail Pavo_IAU.svg?width=300.
- Alpha_Pavonis wikiPageID "1522379".
- Alpha_Pavonis wikiPageRevisionID "602157087".
- Alpha_Pavonis ageMyr "0.2".
- Alpha_Pavonis appmagV "1.94".
- Alpha_Pavonis bV "−0.20".
- Alpha_Pavonis class "B2 IV".
- Alpha_Pavonis constell Pavo_(constellation).
- Alpha_Pavonis epoch "J2000".
- Alpha_Pavonis gravity "3.8".
- Alpha_Pavonis hasPhotoCollection Alpha_Pavonis.
- Alpha_Pavonis luminosity "2200".
- Alpha_Pavonis mass "to".
- Alpha_Pavonis pError "0.52".
- Alpha_Pavonis parallax "18.24".
- Alpha_Pavonis propMoDec "−86.02".
- Alpha_Pavonis propMoRa "6.9".
- Alpha_Pavonis radialV "+2.0".
- Alpha_Pavonis radius "4.5".
- Alpha_Pavonis rotationalVelocity "39".
- Alpha_Pavonis temperature "18000".
- Alpha_Pavonis uB "−0.71".
- Alpha_Pavonis subject Category:B-type_subgiants.
- Alpha_Pavonis subject Category:Bayer_objects.
- Alpha_Pavonis subject Category:HR_objects.
- Alpha_Pavonis subject Category:Henry_Draper_Catalogue_objects.
- Alpha_Pavonis subject Category:Hipparcos_objects.
- Alpha_Pavonis subject Category:Pavo_(constellation).
- Alpha_Pavonis subject Category:Spectroscopic_binaries.
- Alpha_Pavonis subject Category:Stars_with_proper_names.
- Alpha_Pavonis type BayerObjects.
- Alpha_Pavonis type BinaryStar109221070.
- Alpha_Pavonis type CelestialBody109239740.
- Alpha_Pavonis type HIPObjects.
- Alpha_Pavonis type HRObjects.
- Alpha_Pavonis type HenryDraperCatalogueObjects.
- Alpha_Pavonis type NaturalObject100019128.
- Alpha_Pavonis type Object100002684.
- Alpha_Pavonis type PhysicalEntity100001930.
- Alpha_Pavonis type SpectroscopicBinaries.
- Alpha_Pavonis type Star109444100.
- Alpha_Pavonis type StarsWithProperNames.
- Alpha_Pavonis type Whole100003553.
- Alpha_Pavonis type CelestialBody.
- Alpha_Pavonis type Star.
- Alpha_Pavonis type PhysicalBody.
- Alpha_Pavonis comment "Alpha Pavonis (α Pav) is a star in the southern constellation Pavo, near the shared border with the Telescopium constellation. It is also known by the name Peacock, which was assigned by Her Majesty's Nautical Almanac Office in the late 1930s during the creation of the Air Almanac, a navigational almanac for the Royal Air Force. Of the fifty-seven stars included in the new almanac, two had no classical names: Epsilon Carinae and Alpha Pavonis.".
- Alpha_Pavonis label "Alfa Pavonis".
- Alpha_Pavonis label "Alpha Pavonis".
- Alpha_Pavonis label "Alpha Pavonis".
- Alpha_Pavonis label "Alpha Pavonis".
- Alpha_Pavonis label "Alpha Pavonis".
- Alpha_Pavonis label "Pauw (ster)".
- Alpha_Pavonis label "Peacock (estrella)".
- Alpha_Pavonis label "Peacock".
- Alpha_Pavonis label "Альфа Павлина".
- Alpha_Pavonis label "くじゃく座アルファ星".
- Alpha_Pavonis label "孔雀十一".
- Alpha_Pavonis sameAs Alpha_Pavonis.
- Alpha_Pavonis sameAs Peacock_(estrella).
- Alpha_Pavonis sameAs Alpha_Pavonis.
- Alpha_Pavonis sameAs Alpha_Pavonis.
- Alpha_Pavonis sameAs Alfa_Pavonis.
- Alpha_Pavonis sameAs くじゃく座アルファ星.
- Alpha_Pavonis sameAs 피콕_(항성).
- Alpha_Pavonis sameAs Pauw_(ster).
- Alpha_Pavonis sameAs Peacock.
- Alpha_Pavonis sameAs Alpha_Pavonis.
- Alpha_Pavonis sameAs m.057s9k.
- Alpha_Pavonis sameAs Q14240.
- Alpha_Pavonis sameAs Q14240.
- Alpha_Pavonis sameAs Alpha_Pavonis.
- Alpha_Pavonis wasDerivedFrom Alpha_Pavonis?oldid=602157087.
- Alpha_Pavonis depiction Pavo_IAU.svg.
- Alpha_Pavonis isPrimaryTopicOf Alpha_Pavonis.
- Alpha_Pavonis name "Alpha Pavonis".