Beta Apodis

Beta Apodis (β Aps, β Apodis) este denumirea Bayer dată pentru o stea aflată în constelația circumpolară sudică Pasărea Paradisului. Este aflată la aproximativ 158 al (48 parseci) distanță de Pământ,^[4] determinată prin măsurători ale paralaxei. Magnitudinea aparentă vizuală a stelei este de +4,24,^[2] ceea ce înseamnă că este destul de luminoasă pentru a putea fi observată cu ochiul liber.

Spectrul acestei stele are caracteristicile K0 III,^[3] care, în conformitate cu modelele evoluției stelare, indică faptul că steaua se află în faza de stea gigantă, adică rezervele de hidrogen din nucleu au fost consumate prin fuziune nucleară. Diametrul angular măsurat al stelei este de 2,09 ± 0,11 mas.^[9] Atmosfera exterioară a stelei Beta Apodis are o temperatură efectivă de aproximativ 4900 de K.^[7] Această căldură mare este cauza nuanței de portocaliu tipică pentru stelele de tip K.^[10]

Referințe

^ SIMBAD
^ ^a ^b Johnson, H. L.; et al. (1966), „UBVRIJKL photometry of the bright stars”, Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
^ ^a ^b Eggen, O. J. (1962), „Space-velocity vectors for 3483 stars with proper motion and radial velocity”, Royal Observatory Bulletin, 51, Bibcode:1962RGOB...51...79E.
^ ^a ^b ^c ^d ^e 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.
^ Evans, D. S. (20 d.Hr.), „The Revision of the General Catalogue of Radial Velocities”, În Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, Bibcode:1967IAUS...30...57E.
^ Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (ed. 3), Birkhäuser, ISBN 3-540-29692-1 . The radius (R_*) is given by:
${\begin{aligned}2\cdot R_{*}&={\frac {(48\cdot 2.09\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 22\cdot R_{\bigodot }\end{aligned}}$
^ ^a ^b ^c ^d Jones, K. L.; et al. (1992), „Spectroscopic investigation of cool giants and the authenticity of their reported microwave emission”, Monthly Notices of the Royal Astronomical Society, 256 (3): 535–544, Bibcode:1992MNRAS.256..535J.
^ „LTT 6652 -- High proper-motion Star”, SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, accesat în 28 iunie 2012
^ Richichi, A.; Percheron, I.; Khristoforova, M. (2005), „CHARM2: An updated Catalog of High Angular Resolution Measurements”, Astronomy and Astrophysics, 431: 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039
^ „The Colour of Stars”, Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, 21 decembrie 2004, arhivat din original la 3 decembrie 2013, accesat în 16 ianuarie 2012

v • d • m Stele din Pasărea Paradisului

Bayer	α • β • γ • δ¹ • δ² • ε • ζ • η • θ • ι • κ¹ • κ²

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