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- Q1329631 subject Q7009834.
- Q1329631 subject Q7465903.
- Q1329631 subject Q8216920.
- Q1329631 subject Q8284780.
- Q1329631 subject Q8293947.
- Q1329631 subject Q8388794.
- Q1329631 abstract "Gamma Arae (γ Ara, γ Arae) is a star in the southern constellation of Ara. With an apparent visual magnitude of 3.3, it is the fourth brightest star in the constellation and is readily visible to the naked eye. From parallax measurements made during the Hipparcos mission, the distance to this star can be estimated as 1,110 light-years (340 parsecs) from Earth.This is an enormous star with 23 times the radius of the Sun. It is radiating 120,000 as much energy as the Sun from its outer envelope at an effective temperature of 21,500 K. This heat gives the star the blue-white glow of a B-type star. The spectrum shows it to match a stellar classification of B1 Ib, with the luminosity class of 'Ib' indicating this is a lower luminosity supergiant star. It is a relatively young body, with an estimated age of around 15.7 million years.Gamma Arae is rotating rapidly with a projected rotational velocity of 269 km s−1, causing it to complete a full rotation about every 4.8 days. In the spectrum of this star, this high rate of spin is causing absorption lines to blend together because of the Doppler effect, making them more difficult to analyze. It is a periodically variable star that undergoes non-radial pulsations with a primary period of 1.1811 days and a secondary period of 0.1281 days.There is some disagreement about the mass of this star in the literature. Tetzlaff et al. (2011) estimate the mass as 12.5 ± 0.6 solar masses, while Fraser et al. (2010) give a mass of around 19 and Lefever et al. (2007) lists a value of 25. It is shedding mass through its stellar wind at the rate of 3.0 × 10−8 solar masses per year, which is equivalent to losing the mass of the Sun every 33 million years. The wind is being effected by the star's rapid rotation, resulting in an enhanced outflow along the equator.Gamma Arae has an optical companion located at an angular separation of 17.9 arcseconds, which is an A-type main sequence star with an apparent magnitude of 10.5.".
- Q1329631 thumbnail Ara_IAU.svg?width=300.
- Q1329631 wikiPageExternalLink AladinPreview?-c=*+gam+Ara&ident=*+gam+Ara&submit=Aladin+previewer.
- Q1329631 wikiPageExternalLink VizieR-S?HR%206462.
- Q1329631 wikiPageWikiLink Q1054200.
- Q1329631 wikiPageWikiLink Q111130.
- Q1329631 wikiPageWikiLink Q124313.
- Q1329631 wikiPageWikiLink Q1357788.
- Q1329631 wikiPageWikiLink Q1426842.
- Q1329631 wikiPageWikiLink Q165074.
- Q1329631 wikiPageWikiLink Q179600.
- Q1329631 wikiPageWikiLink Q180892.
- Q1329631 wikiPageWikiLink Q193599.
- Q1329631 wikiPageWikiLink Q2.
- Q1329631 wikiPageWikiLink Q212111.
- Q1329631 wikiPageWikiLink Q22066400.
- Q1329631 wikiPageWikiLink Q471805.
- Q1329631 wikiPageWikiLink Q499138.
- Q1329631 wikiPageWikiLink Q523.
- Q1329631 wikiPageWikiLink Q555846.
- Q1329631 wikiPageWikiLink Q6243.
- Q1329631 wikiPageWikiLink Q6464.
- Q1329631 wikiPageWikiLink Q654182.
- Q1329631 wikiPageWikiLink Q654396.
- Q1329631 wikiPageWikiLink Q7009834.
- Q1329631 wikiPageWikiLink Q7465903.
- Q1329631 wikiPageWikiLink Q76436.
- Q1329631 wikiPageWikiLink Q8216920.
- Q1329631 wikiPageWikiLink Q8284780.
- Q1329631 wikiPageWikiLink Q8293947.
- Q1329631 wikiPageWikiLink Q8388794.
- Q1329631 wikiPageWikiLink Q845735.
- Q1329631 wikiPageWikiLink Q854050.
- Q1329631 wikiPageWikiLink Q8928.
- Q1329631 wikiPageWikiLink Q9253.
- Q1329631 wikiPageWikiLink Q984158.
- Q1329631 type Place.
- Q1329631 type CelestialBody.
- Q1329631 type Location.
- Q1329631 type Place.
- Q1329631 type Star.
- Q1329631 type Thing.
- Q1329631 comment "Gamma Arae (γ Ara, γ Arae) is a star in the southern constellation of Ara. With an apparent visual magnitude of 3.3, it is the fourth brightest star in the constellation and is readily visible to the naked eye. From parallax measurements made during the Hipparcos mission, the distance to this star can be estimated as 1,110 light-years (340 parsecs) from Earth.This is an enormous star with 23 times the radius of the Sun.".
- Q1329631 label "Gamma Arae".
- Q1329631 depiction Ara_IAU.svg.
- Q1329631 name "Gamma Arae".