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Home > General > Type-O Stars: O-Type Bright Giants, O-Type Giants, O-Type Main Sequence Stars, O-Type Supergiants, Cygnus X-1, Single X-Ray Star
Type-O Stars: O-Type Bright Giants, O-Type Giants, O-Type Main Sequence Stars, O-Type Supergiants, Cygnus X-1, Single X-Ray Star

Type-O Stars: O-Type Bright Giants, O-Type Giants, O-Type Main Sequence Stars, O-Type Supergiants, Cygnus X-1, Single X-Ray Star


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About the Book

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 23. Chapters: O-type bright giants, O-type giants, O-type main sequence stars, O-type supergiants, Cygnus X-1, Single X-ray star, X-ray dark star, V838 Monocerotis, Zeta Orionis, Zeta Puppis, Zeta Ophiuchi, Alpha Camelopardalis, Delta Orionis, AE Aurigae, Blue supergiant, Gamma Velorum, Blue giant, Mu Columbae, Lambda Orionis, Theta Orionis C, Iota Orionis, Xi Persei, Sigma Orionis, 53 Arietis, AFGL 2591, Upsilon Sagittarii, Sigma Scorpii, Krzeminski's Star, HD 93129A, O-type main-sequence star, Plaskett's star, LH54-425, Tau Canis Majoris, Sanduleak -69 202a, LY Aurigae, V560 Carinae, HD 35619, R136b, HD 93205, 29 Canis Majoris. Excerpt: Cygnus X-1 (abbreviated Cyg X-1) is a well-known galactic X-ray source in the constellation Cygnus. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources seen from Earth, producing a peak X-ray flux density of 2.310 WmHz (2.310 Jansky). Cygnus X-1 was the first X-ray source widely accepted to be a black hole candidate and it remains among the most studied astronomical objects in its class. It is now estimated to have a mass about 8.7 times the mass of the Sun and has been shown to be too compact to be any known kind of normal star or other likely object besides a black hole. If so, the radius of its event horizon is probably about 26 km. Cygnus X-1 belongs to a high-mass X-ray binary system about 6,000 light years from the Sun that includes a blue supergiant variable star designated HDE 226868 which it orbits at about 0.2 AU, or 20% of the distance from the Earth to the Sun. A stellar wind from the star provides material for an accretion disk around the X-ray source. Matter in the inner disk is heated to millions of kelvins (K), generating the observed X-rays. A pair of jets, arranged perpendicular to the disk, are carrying part of the infalling material aw...


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Product Details
  • ISBN-13: 9781157147299
  • Publisher: Books LLC, Wiki Series
  • Publisher Imprint: Books LLC, Wiki Series
  • Height: 246 mm
  • No of Pages: 24
  • Spine Width: 1 mm
  • Weight: 64 gr
  • ISBN-10: 1157147291
  • Publisher Date: 26 Jul 2011
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: O-Type Bright Giants, O-Type Giants, O-Type Main Sequence Stars, O-Type Supergiants, Cygnus X-1, Single X-Ray Star
  • Width: 189 mm


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