KIC 8462852: Verskil tussen weergawes

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Wysiging soos op 11:57, 27 Mei 2016

KIC 8462852
’n Kunstenaarsvoorstelling van ’n swerm komete om KIC 8462852.
’n Kunstenaarsvoorstelling van ’n swerm komete om KIC 8462852.
Sterrebeeld Swaan
Spektraaltipe F3 V/IV
Soort Hoofreeksster
Waarnemingsdata (Epog J2000)
Regte klimming 20h 06m 15.457s
Deklinasie +44° 27′ 24.61″
Skynmagnitude (m) +11,705±0,017
Absolute magnitude (M) 3,08[1][2]
B-V-kleurindeks  0,557
Besonderhede
Massa (M☉) 1,43
Radius (R☉) 1,58
Ligsterkte (L☉) 4,7
Temperatuur (K) 6 750±120
Afstand (ligjaar) 1 480
Ander name
TYC 3162-665-1,[1] 2MASS J20061546+4427248[1]
Portaal  Portaalicoon   Sterrekunde

KIC 8462852,[1] is ’n tipe F-hoofreeksster in die sterrebeeld Swaan, sowat 1 480 ligjare van die Aarde af. Dit word ook genoem Tabby se Ster na die sterrekundige Tabetha S. Boyajian,[3] of Ster WTF, amptelik vir "Where's The Flux?",[4][5][6][7] maar ook in verwysing na ’n Engelse uitdrukking van ongeloof.[8]

Die ster se ongewone ligwisselings is in 2015 ontdek[1] uit data van die Kepler-ruimteteleskoop,[1][9][10][11][12] wat wisselings in die helderheid van verafgeleë sterre waarneem vir die moontlike opsporing van eksoplanete.[13] KIC 8462852 is tot dusver die enigste van die sowat 150 000 sterre wat die Kepler-sending monitor wat op dié manier optree.[14]

Verskeie hipoteses bestaan vir die ster se groot wisselings in helderheid. Die mees algemene een, gebaseer op die gebrek aan infrarooilig, is dat ’n swerm koue, stowwerige komeetstukke in ’n hoogs eksentrieke wentelbaan om die ster is.[15][16][17] Nog ’n voorstel is dat baie klein massas in "digte formasie" om die ster wentel.[9] Sommige glo die wisselings in helderheid word veroorsaak deur buiteaardse wesens wat ’n Dyson-swerm om die ster bou.[9][18][19][20] Die SETI-instituut se aanvanklike radioverkenning van KIC 8462852 het egter geen tekens opgelewer van tegnologiegebaseerde radioseine van die ster af nie.[21][22][23]

Verwysings

  1. ↑ 1,0 1,1 1,2 1,3 1,4 1,5 Boyajian, T. S.; LaCourse, D. M.; Rappaport, S. A.; Fabrycky, D.; Fischer, D. A.; et al. (April 2016). "Planet Hunters IX. KIC 8462852 – where's the flux?". Monthly Notices of the Royal Astronomical Society. 457 (4): 3988–4004. arXiv:1509.03622. Bibcode:2016MNRAS.457.3988B. doi:10.1093/mnras/stw218.
  2. ↑ Pecaut, Mark J.; Mamajek, Eric E. (September 2013). "Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-main-sequence Stars". The Astrophysical Journal Supplement. 208 (1). 9. arXiv:1307.2657. Bibcode:2013ApJS..208....9P. doi:10.1088/0067-0049/208/1/9.
  3. ↑ Wenz, John (9 Februarie 2016). "NASA's Next Great Telescope Will Settle This Alien Megastructure Mystery For Good". Popular Mechanics. Besoek op 13 Februarie 2016.
  4. ↑ Wright, Jason (15 Oktober 2015). "KIC 8462852: Where's the Flux?". AstroWright. Pennsylvania State University. Besoek op 16 Oktober 2015.
  5. ↑ Newsome, John (16 Oktober 2015). "Space anomaly gets extraterrestrial intelligence experts' attention". CNN News. Besoek op 16 Oktober 2015.
  6. ↑ "Discovery of a strange star could mean alien life". Fox News. 15 Oktober 2015. Besoek op 16 Oktober 2015.
  7. ↑ King, Bob (16 Oktober 2015). "What's Orbiting KIC 8462852 – Shattered Comet or Alien Megastructure?". Universe Today. Besoek op 16 Oktober 2015.
  8. ↑ Strom, Marcus (15 Oktober 2015), It's either aliens or a swarm of comets: scientists baffled by WTF 001, our galaxy's strangest star, The Sydney Morning Herald, http://www.smh.com.au/technology/sci-tech/astronomy/its-either-aliens-or-a-swarm-of-comets-scientists-baffled-by-wtf-001-our-galaxys-strangest-star-20151014-gk9iwj.html, besoek op 16 Oktober 2015 
  9. ↑ 9,0 9,1 9,2 Andersen, Ross (13 Oktober 2015). "The Most Mysterious Star in Our Galaxy". The Atlantic. Besoek op 13 Oktober 2015.
  10. ↑ Fecht, Sarah (13 Oktober 2015). "Have We Detected Megastructures Built By Aliens Around A Distant Star? Or Just A Cloud Of Comets? Scientists Want To Investigate Further". Popular Science. Besoek op 14 Oktober 2015.
  11. ↑ Wright, Jason T.; Cartier, Kimberly M. S.; Zhao, Ming; Jontof-Hutter, Daniel; Ford, Eric B. (Januarie 2016). "The Ĝ Search for Extraterrestrial Civilizations with Large Energy Supplies. IV. The Signatures and Information Content of Transiting Megastructures". The Astrophysical Journal. 816 (1). 17. arXiv:1510.04606. Bibcode:2016ApJ...816...17W. doi:10.3847/0004-637X/816/1/17.
  12. ↑ ASTRON (15 September 2015). "Good night, sleep tight: Advanced alien civilisations rare or absent in the local Universe". Persberig. https://www.astron.nl/about-astron/press-public/news/werp/good-night-sleep-tight-advanced-alien-civilisations-rare-or-abse. Besoek op 15 October 2015. 
  13. ↑ Grush, Loren (16 Oktober 2015). "Why it's so hard for astronomers to discuss the possibility of alien life". The Verge. Besoek op 17 Oktober 2015.
  14. ↑ https://www.cfa.harvard.edu/news/su201620
  15. ↑ Clavin, Whitney; Johnson, Michele (24 November 2015). "Strange Star Likely Swarmed by Comets". NASA. Besoek op 24 November 2015.
  16. ↑ Griffin, Andrew (25 November 2015). "Star that could have 'alien megastructure' around it is almost certainly covered by a swarm of comets, Nasa says". The Independent. Besoek op 26 November 2015.
  17. ↑ Bodman, Eva H. L.; Quillen, Alice (27 November 2015). "KIC 8462852: Transit of a Large Comet Family". [astro-ph.EP]. 
  18. ↑ Kaplan, Sarah (15 Oktober 2015). "The strange star that has serious scientists talking about an alien megastructure". The Washington Post. Besoek op 15 Oktober 2015.
  19. ↑ Aron, Jacob (18 September 2015). "Citizen scientists catch cloud of comets orbiting distant star". New Scientist. Besoek op 15 Oktober 2015.
  20. ↑ Plait, Phil (14 Oktober 2015). "Did Astronomers Find Evidence of an Alien Civilization? (Probably Not. But Still Cool.)". Slate. Besoek op 15 Oktober 2015.
  21. ↑ "Looking For Deliberate Radio Signals From KIC 8462852". 5 November 2015. Besoek op 5 November 2015.
  22. ↑ The SETI Institute (5 November 2015). "Looking for Deliberate Radio Signals from KIC 8462852". Persberig. http://www.seti.org/seti-institute/press-release/looking-deliberate-radio-signals-kic-8462852. Besoek op 8 November 2015. 
  23. ↑ Harp, G. R.; Richards, Jon; Shostak, Seth; Tarter, J. C.; Vakoch, Douglas A.; Munson, Chris (5 November 2015). "Radio SETI Observations of the Anomalous Star KIC 8462852". [astro-ph.EP]. 
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