Beta Apodis

	Beta Apodis
Observationsdata; Epok: J2000
Stjärnbild	Paradisfågeln
Rektascension	16t 43m 04,65651s
Deklination	−77° 31′ 02,7629″
Skenbar magnitud ()	+4,24
Stjärntyp
Spektraltyp	K0 III
U–B	+0,95
B–V	+1,06
Astrometri
Radialhastighet ()	-30,3 ± 0,7 km/s
Egenrörelse (µ)	RA: -280,588 ± 0,440 mas/år; Dek.: -355,704 ± 0,576 mas/år
Parallax ()	21,8518 ± 0,2620
Avstånd	149 ± 2 lå (45,8 ± 0,5 pc)
Absolut magnitud ()	0,819
Detaljer
Massa	1,84 M☉
Radie	11 R☉
Luminositet	60,79 L☉
Temperatur	4 900 K
Metallicitet	-0,02
Andra beteckningar
	CP-77 1221, FK5 3319, HD 149324, HIP 81852, HR 6163, SAO 257424.

Beta Apodis (β Apodis förkortat Beta Aps, β Aps) är en ensam stjärna i mellersta delen av i stjärnbilden Paradisfågeln. Den har en magnitud av 4,24^[2] och är synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 21,9 mas,^[5] beräknas den befinna sig på ett avstånd av ca 150 ljusår (ca 46 parsek) från solen.

Egenskaper

Beta Apodis är en orange till gul jättestjärna av spektralklass K0 III,^[3] vilket anger att den har förbrukat vätet i dess kärna och har utvecklats till en jättestjärna. Den har en massa som är ca 1,8^[7] gånger solens massa, en radie som, baserat på uppmätt vinkeldiametern för stjärnan på 2,09 ± 0,11 mas,^[12] är ca 11^[8] gånger solens radie och avger ca 60^[9] gånger mer energi än solen från dess fotosfär vid en effektiv temperatur på ca 4 900 K.^[10]

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, 27 januari 2019.

Noter

^ [a b] van Leeuwen, F. (November 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.
^ [a b c d] 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.
^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in 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.
^ [a b c d] 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. Gaia DR2 record for this source at VizieR.
^ Liu, Y. J.; et al. (2007), "The abundances of nearby red clump giants", Monthly Notices of the Royal Astronomical Society, 382 (2): 553–66, Bibcode:2007MNRAS.382..553L, doi:10.1111/j.1365-2966.2007.11852.x.
^ [a b] Liu, Y. J.; Zhao, G.; Shi, J. R.; Pietrzyński, G.; Gieren, W. (2007). "The abundances of nearby red clump giants". Monthly Notices of the Royal Astronomical Society. 382 (2): 553–66. Bibcode:2007MNRAS.382..553L. doi:10.1111/j.1365-2966.2007.11852.x.
^ [a b] Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), 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] https://www.universeguide.com/star/betaapodis.Hämtad 2019-01-27.
^ [a b c] Jones, K. L.; et al. (June 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, doi:10.1093/mnras/256.3.535.
^ "bet Aps". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2012-06-28.
^ Richichi, A.; Percheron, I.; Khristoforova, M. (February 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

Externa länkar

https://www.universeguide.com/star/betaapodis

[A-1] [a b] van Leeuwen, F. (November 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.

[B-2] [a b c d] 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.

[C-3] [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.

[D-4] Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in 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.

[E-5] [a b c d] 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. Gaia DR2 record for this source at VizieR.

[F-6] Liu, Y. J.; et al. (2007), "The abundances of nearby red clump giants", Monthly Notices of the Royal Astronomical Society, 382 (2): 553–66, Bibcode:2007MNRAS.382..553L, doi:10.1111/j.1365-2966.2007.11852.x.

[G-7] [a b] Liu, Y. J.; Zhao, G.; Shi, J. R.; Pietrzyński, G.; Gieren, W. (2007). "The abundances of nearby red clump giants". Monthly Notices of the Royal Astronomical Society. 382 (2): 553–66. Bibcode:2007MNRAS.382..553L. doi:10.1111/j.1365-2966.2007.11852.x.

[H-8] [a b] Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), Birkhäuser, ISBN 3-540-29692-1. The radius (R*) is given by:: ${\begin{aligned}2\cdot R_{*}&={\frac {(48\cdot 2.09\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 22\cdot R_{\bigodot }\end{aligned}}$

[I-9] [a b] https://www.universeguide.com/star/betaapodis.Hämtad 2019-01-27.

[J-10] [a b c] Jones, K. L.; et al. (June 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, doi:10.1093/mnras/256.3.535.

[K-11] "bet Aps". SIMBAD. Centre de données astronomiques de Strasbourg. Hämtad 2012-06-28.

[L-12] Richichi, A.; Percheron, I.; Khristoforova, M. (February 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

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Observationsdata Epok: J2000
Beta Apodis

Stjärnbild	Paradisfågeln
Rektascension	16^t 43^m 04,65651^s^[1]
Deklination	−77° 31′ 02,7629″^[1]
Skenbar magnitud ( $V$ )	+4,24^[2]
Stjärntyp
Spektraltyp	K0 III^[3]
U–B	+0,95^[2]
B–V	+1,06^[2]
Astrometri
Radialhastighet ( $R_{v}$ )	-30,3 ± 0,7^[4] km/s
Egenrörelse (µ)	RA: -280,588 ± 0,440^[5] mas/år Dek.: -355,704 ± 0,576^[5] mas/år
Parallax ( $\pi$ )	21,8518 ± 0,2620^[5]
Avstånd	149 ± 2 lå (45,8 ± 0,5 pc)
Absolut magnitud ( $M_{V}$ )	0,819^[6]
Detaljer
Massa	1,84^[7] M_☉
Radie	11^[8] R_☉
Luminositet	60,79^[9] L_☉
Temperatur	4 900^[10] K
Metallicitet	-0,02^[10]
Andra beteckningar
CP-77 1221, FK5 3319, HD 149324, HIP 81852, HR 6163, SAO 257424. ^[11]