Alpha Sculptoris

Alpha Sculptoris
Die ligging van Alpha Sculptoris (in die rooi sirkel).
Die ligging van Alpha Sculptoris (in die rooi sirkel).
Sterrebeeld Beeldhouer
Spektraaltipe B7 IIIp[1]
Soort Reusester
Waarnemingsdata (Epog J2000)
Regte klimming 00h 58m 36.35930s[2]
Deklinasie -29° 21′ 26.8247″[2]
Skynmagnitude (m) 4,3[3]
Absolute magnitude (M) -2,58[4]
B-V-kleurindeks  -0,155[5]
U-B-kleurindeks  0,515[5]
Besonderhede
Massa (M☉) 5,01[6]
Radius (R☉) 7,52[7]
Ligsterkte (L☉) 1 549[6]
Ouderdom (jaar) 93 miljoen[6]
Temperatuur (K) 13 600[8]
Afstand (ligjaar) 780
Rotasiespoed (km/s) 17[8]
Metaalinhoud [Fe/H] 0,90[9]
Eienskappe
Veranderlikheid SX Ari[10]
Ander name
CD−30° 297, FK5 35, HD 5737, HIP 4577, HR 280, SAO 166716[11]
Portaal  Portaalicoon   Sterrekunde

Alpha Sculptoris (afgekort as α Scl) is ’n blouwit ster in die suidelike sterrebeeld Beeldhouer (Sculptor). Met ’n skynbare magnitude van 4,3[3] is dit die helderste ster in hierdie andersins dowwe sterrebeeld. Volgens parallaksmetings is dit sowat 780 ligjare van die Son af.[2]

Dit is ’n B-tipe reusester en ’n SX Arietis-veranderlike. Sy helderheid wissel met minder as ’n 10de van ’n magnitude.[10]

Alpha Sculptoris se ligsterkte is sowat 1 500 keer dié van die Son en sy effektiewe temperatuur 13 600 K. Sy radius is sowat sewe keer en sy massa vyf keer die Son s'n.

Verwysings

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  1. ↑ Houk, Nancy (1979), "Michigan catalogue of two-dimensional spectral types for the HD stars", Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0 (Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan) 3, Bibcode: 1982mcts.book.....H 
  2. ↑ 2,0 2,1 2,2 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.
  3. ↑ 3,0 3,1 Wielen, R. et al. (1999), "Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions", Veröff. Astron. Rechen-Inst. Heidelb (Astronomisches Rechen-Institut Heidelberg) 35 (35), Bibcode: 1999VeARI..35....1W 
  4. ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  5. ↑ 5,0 5,1 Gutierrez-Moreno, Adelina et al. (1966), "A System of photometric standards", Publ. Dept. Astron. Univ. Chile (Publicaciones Universidad de Chile, Department de Astronomy) 1: 1–17, Bibcode: 1966PDAUC...1....1G 
  6. ↑ 6,0 6,1 6,2 Kochukhov, O.; Bagnulo, S. (2006). "Evolutionary state of magnetic chemically peculiar stars". Astronomy and Astrophysics. 450 (2): 763. arXiv:astro-ph/0601461. Bibcode:2006A&A...450..763K. doi:10.1051/0004-6361:20054596.
  7. ↑ Shulyak, D.; Paladini, C.; Causi, G. Li; Perraut, K.; Kochukhov, O. (2014). "Interferometry of chemically peculiar stars: Theoretical predictions versus modern observing facilities". Monthly Notices of the Royal Astronomical Society. 443 (2): 1629. arXiv:1406.6093. Bibcode:2014MNRAS.443.1629S. doi:10.1093/mnras/stu1259.
  8. ↑ 8,0 8,1 Saffe, C.; Levato, H. (2014). "On the nature of sn stars. I. A detailed abundance study" (PDF). Astronomy & Astrophysics. 562: A128. arXiv:1401.5764. Bibcode:2014A&A...562A.128S. doi:10.1051/0004-6361/201322091.
  9. ↑ Schmitt, A. (Maart 1973), "The weak-helium-line star α Sculptoris. I. The line-spectrum", Astronomy and Astrophysics Supplement 9: 427, Bibcode: 1973A&AS....9..427S 
  10. ↑ 10,0 10,1 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Oorspronklik gepubliseer in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  11. ↑ "alf Scl". Simbad. Centre de données astronomiques de Strasbourg. Besoek op 8 April 2012.

Bronne

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