Alpha Sculptoris

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]

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

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

wysig
  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, Bibcode1982mcts.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), Bibcode1999VeARI..35....1W 
  4. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode2012AstL...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, Bibcode1966PDAUC...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, Bibcode1973A&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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