For faster navigation, this Iframe is preloading the Wikiwand page for Alpha Muscae.

Alpha Muscae

Alpha Muscae
Die ligging van Alpha Muscae (in die rooi sirkel).
Die ligging van Alpha Muscae (in die rooi sirkel).
Sterrebeeld Vlieg
Spektraaltipe B2 IV-V[1]
Soort Hoofreeks-subreus
Waarnemingsdata (Epog J2000)
Regte klimming 12h 37m 11.01789s[2]
Deklinasie -69° 08′ 08.0332″[2]
Skynmagnitude (m) 2,69[3]
Absolute magnitude (M) -2,2[4]
B-V-kleurindeks  -0,219[3]
U-B-kleurindeks  -0,854[3]
Besonderhede
Massa (M) 8,8 ± 0,1[1]
Radius (R) 4,8[5]
Ligsterkte (L) 4 000[4]
Ouderdom (jaar) 18,3 ± 3,2 miljoen[1]
Temperatuur (K) 21 400[4]
Rotasiespoed (km/s) 114[6]
Eienskappe
Veranderlikheid Beta Cephei[7]
Ander name
CD-68 1104, CPD-68 1702, FK5 474, HD 109668, HIP 61585, HR 4798, SAO 251974[8]
Portaal  Portaalicoon   Sterrekunde

Alpha Muscae (afgekort as α Mus) is ’n ster in die suidelike sterrebeeld Vlieg (Musca). Met ’n skynbare magnitude van 2,7[3] is dit die helderste ster in die sterrebeeld. Volgens parallaksmetings is die ster sowat 315 ligjare van die Son af.[2]

Eienskappe

[wysig | wysig bron]

Met ’n sterreklassifikasie van B2 IV-V[1] lyk dit of die ster besig is om weg van die hoofreeks te evolueer en ’n subreus te word terwyl die waterstof in sy kern aan die opraak is. Dit is groter as die Son: Sy massa is sowat nege keer soveel[1] en sy radius amper vyf keer soveel.[5] Sy ligsterkte is sowat 4 000 keer die Son s'n[4] en die effektiewe temperatuur van sy buitenste atmosfeer is 21 400 K,[4] wat dit die blouwit kleur van ’n B-tipe ster gee.[9]

Dit lyk of Alpha Muscae ’n Beta Cephei-veranderlike is. Telting en kollegas was baie seker dat dit ’n Beta Cephei is vanweë gereelde pulse in sy spektrum in ’n ondersoek wat in 2006 gepubliseer is,[7] hoewel Stankov en Handler (2005) dit as ’n swak of verwerpte kandidaat lys in hulle Catalog of Galactic β Cephei Stars.[6] Die ster roteer vinnig, teen sowat 114 km s-1,[6] en is omtrent 18 miljoen jaar oud.[1]

Alpha Muscae is ’n eiebeweginglid van die Laer-Centaurus-Crux-subgroep in die Scorpius-Centaurus-assosiasie (’n OB-assosiasie), die naaste groep swaar sterre aan die Son wat saam deur die ruimte beweeg.[4] Alpha Muscae beweeg teen ’n besonder vinnige snelheid van 10 km s-1 wat, hoewel dit hoog is, nie hoog genoeg is dat dit as ’n dwaalster gereken kan word nie.[1]

Verwysings

[wysig | wysig bron]
  1. 1,0 1,1 1,2 1,3 1,4 1,5 1,6 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (Januarie 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, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode2011MNRAS.410..190T 
  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, doi:10.1051/0004-6361:20078357, Bibcode2007A&A...474..653V 
  3. 3,0 3,1 3,2 3,3 Gutierrez-Moreno, Adelina; Moreno, Hugo (Junie 1968), "A photometric investigation of the Scorpio-Centaurus association", Astrophysical Journal Supplement 15: 459, doi:10.1086/190168, Bibcode1968ApJS...15..459G 
  4. 4,0 4,1 4,2 4,3 4,4 4,5 de Geus, E. J.; de Zeeuw, P. T.; Lub, J. (Junie 1989), "Physical parameters of stars in the Scorpio-Centaurus OB association", Astronomy and Astrophysics 216 (1-2): 44–61, Bibcode1989A&A...216...44D 
  5. 5,0 5,1 Underhill, A. B. et al. (November 1979), "Effective temperatures, angular diameters, distances and linear radii for 160 O and B stars", Monthly Notices of the Royal Astronomical Society 189: 601–605, doi:10.1093/mnras/189.3.601, Bibcode1979MNRAS.189..601U 
  6. 6,0 6,1 6,2 Stankov, Anamarija; Handler, Gerald (June 2005), "Catalog of Galactic β Cephei Stars", The Astrophysical Journal Supplement Series 158 (2): 193–216, doi:10.1086/429408, Bibcode2005ApJS..158..193S 
  7. 7,0 7,1 Telting, J. H. et al. (Junie 2006), "A high-resolution spectroscopy survey of β Cephei pulsations in bright stars", Astronomy and Astrophysics 452 (3): 945–953, doi:10.1051/0004-6361:20054730, Bibcode2006A&A...452..945T 
  8. "HD 109668 -- Variable Star of Beta Cep type", SIMBAD Astronomical Database, http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=alpha+muscae, besoek op 2007-01-29 
  9. "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, archived from the original on 10 Maart 2012, https://www.webcitation.org/6630AbtJZ?url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html, besoek op 2012-01-16 

Bronne

[wysig | wysig bron]
{{bottomLinkPreText}} {{bottomLinkText}}
Alpha Muscae
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?