Star in the constellation Aquarius
15 Aquarii , abbreviated 15 Aqr , is a single, blue-white star in the zodiac constellation of Aquarius . 15 Aquarii is the Flamsteed designation . It is a dim star that is just visible to the naked eye under good viewing conditions, having an apparent visual magnitude of 5.83. Based upon an annual parallax shift of 4.6 mas , it is located around 710 light years away. At that distance, the visual magnitude is diminished by an extinction of 0.18 due to interstellar dust . It is moving closer to the Earth with a heliocentric radial velocity of −9 km/s. Relative to its neighbors, 15 Aqr has a peculiar velocity of 28.7+2.9runaway star .
Hube (1970) found a stellar classification of B7 III for this star, which would suggest it is a B-type giant star . However, the Bright Star Catalogue (1964) listed it as a B-type main-sequence star with a class of B5 V, and multiple sources use this instead. The star is roughly 65 million years old with a projected rotational velocity of 20 km/s. It has an estimated 5.7 times the mass of the Sun and about 3.4 times the Sun's radius . 15 Aquarii is radiating 822 times the Sun's luminosity from its photosphere at an effective temperature of 14,318 K.
References
^ Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics 616 . A1. arXiv :1804.09365 . Bibcode :2018A&A...616A...1G . doi :10.1051/0004-6361/201833051 .
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^ Hube, Douglas P. (1970), "The radial velocities of 335 late B-type stars", Memoirs of the Royal Astronomical Society , 72 : 233, Bibcode :1970MmRAS..72..233H .
^ Hoffleit, Dorrit (1964), Catalogue of Bright Stars (3rd revised ed.), New Haven, Conn.: Yale University Observatory, Bibcode :1964cbs..book.....H .
^ Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters , 32 (11): 759–771, arXiv :1606.08053 , Bibcode :2006AstL...32..759G , doi :10.1134/S1063773706110065 , S2CID 119231169 .
^ van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664, arXiv :0708.1752 , Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 .
^ Tetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society , 410 (1): 190–200, arXiv :1007.4883 , Bibcode :2011MNRAS.410..190T , doi :10.1111/j.1365-2966.2010.17434.x , S2CID 118629873 .
^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics , 367 (Third ed.): 521–524, arXiv :astro-ph/0012289 , Bibcode :2001A&A...367..521P , doi :10.1051/0004-6361:20000451 , S2CID 425754 .
^ Takeda, Yoichi; et al. (October 2010), "Oxygen and Neon Abundances of B-Type Stars in Comparison with the Sun", Publications of the Astronomical Society of Japan , 62 (5): 1239–1248, arXiv :1008.1220 , Bibcode :2010PASJ...62.1239T , doi :10.1093/pasj/62.5.1239 .
^ Strom, Stephen E.; et al. (2005), "B Star Rotational Velocities in h and χ Persei: A Probe of Initial Conditions during the Star Formation Epoch?", The Astronomical Journal , 129 (2): 809–828, arXiv :astro-ph/0410337 , Bibcode :2005AJ....129..809S , doi :10.1086/426748 , S2CID 15059129 .
"15 Aqr" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved October 22, 2018.Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv :0806.2878 , Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x , S2CID 14878976 .
Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters , 38 (11): 694–706, arXiv :1606.09028 , Bibcode :2012AstL...38..694G , doi :10.1134/S1063773712110035 , S2CID 119108982 .
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