The Dog Stars: The hope-filled story of a world changed by global catastrophe

Product Information

Petit, P.; etal. (August 2011). "Detection of a weak surface magnetic field on Sirius A: are all tepid stars magnetic?". Astronomy and Astrophysics. 532: L13. arXiv: 1106.5363. Bibcode: 2011A&A...532L..13P. doi: 10.1051/0004-6361/201117573. S2CID 119106028. In Sanskrit, the star is known as Mrgavyadha, or “deer hunter,” representing Rudra (Shiva), or as Lubdhaka, meaning “hunter.” The orbital motion of the Sirius binary system brings the two stars to a minimum angular separation of 3 arcseconds and a maximum of 11arcseconds. At the closest approach, it is an observational challenge to distinguish the white dwarf from its more luminous companion, requiring a telescope with at least 300mm (12in) aperture and excellent seeing conditions. After a periastron occurred in 1994, [c]

See also: Sirius in fiction The position of Sirius on a radar map among all stellar objects or stellar systems within 9 light years (ly) from the map's center, the Sun (Sol). The diamond-shapes are their positions entered according to right ascension in hours angle (indicated at the edge of the map's reference disc), and according to their declination. The second mark shows each's distance from Sol, with the concentric circles indicating the distance in steps of one ly. Baker, Douglas (1977). The Seven Rays: Key to the Mysteries. Wellingborough, Herts.: Aquarian Press. ISBN 0-87728-377-X.Aitken, R. G. (1942). "Edmund Halley and Stellar Proper Motions". Astronomical Society of the Pacific Leaflets. 4 (164): 103–112. Bibcode: 1942ASPL....4..103A. a b c d e f g Bond, Howard E.; Schaefer, Gail H.; Gilliland, Ronald L.; Holberg, Jay B.; Mason, Brian D.; Lindenblad, Irving W.; etal. (2017). "The Sirius system and its astrophysical puzzles: Hubble Space Telescope and ground-based astrometry". The Astrophysical Journal. 840 (2): 70. arXiv: 1703.10625. Bibcode: 2017ApJ...840...70B. doi: 10.3847/1538-4357/aa6af8. S2CID 51839102. Bessel, F. W. (December 1844). "On the Variations of the Proper Motions of Procyon and Sirius". Monthly Notices of the Royal Astronomical Society. 6 (11): 136–141. Bibcode: 1844MNRAS...6R.136B. doi: 10.1093/mnras/6.11.136a. This article about a speculative fiction novel of the 2010s is a stub. You can help Wikipedia by expanding it.

Craig, John; Gravatt, William; Slater, Thomas; Rennie, George. "The Craig Telescope". craig-telescope.co.uk . Retrieved 3 January 2011. Sordiglioni, Gianluca (2016). "06451-1643 AGC 1AB (Sirio)". Double Star Database . Retrieved 17 April 2020. Kuchner, Marc J.; Brown, Michael E. (2000). "A Search for Exozodiacal Dust and Faint Companions Near Sirius, Procyon, and Altair with the NICMOS Coronagraph". Publications of the Astronomical Society of the Pacific. 112 (772): 827–832. arXiv: astro-ph/0002043. Bibcode: 2000PASP..112..827K. doi: 10.1086/316581. S2CID 18971656. The easiest way to locate Sirius in the night sky is by using the stars of the Orion’s Belt as pointers. The three bright belt stars – Alnilam, Alnitak, and Mintaka, point downward to Sirius to the left. Sirius is about 8 times as far from the Orion’s Belt as the belt is wide. Schlosser, W.; Bergmann, W. (November 1985). "An early-medieval account on the red colour of Sirius and its astrophysical implications". Nature. 318 (6041): 45–46. Bibcode: 1985Natur.318...45S. doi: 10.1038/318045a0. S2CID 4323130.Sirius appears bright because of its intrinsic luminosity and its proximity to the Solar System. At a distance of 2.64 parsecs (8.6 ly), the Sirius system is one of Earth's nearest neighbours. Sirius is gradually moving closer to the Solar System; it is expected to increase in brightness slightly over the next 60,000years to reach a peak magnitude of −1.68. Duarte, Paulo Araújo. "Astronomia na Bandeira Brasileira". Universidade Federal de Santa Catarina. Archived from the original on 2 May 2008 . Retrieved 9 July 2009. van Gent, R. H. (January 1987). "The colour of Sirius in the sixth century". Nature. 318 (325): 87–89. Bibcode: 1987Natur.325...87V. doi: 10.1038/325087b0. S2CID 186243165. Koester, D.; Chanmugam, G. (1990). "Physics of white dwarf stars". Reports on Progress in Physics. 53 (7): 837–915. Bibcode: 1990RPPh...53..837K. doi: 10.1088/0034-4885/53/7/001. S2CID 250915046.

Schaaf, Fred (2008). The Brightest Stars. Hoboken, New Jersey: John Wiley & Sons. p.94. ISBN 978-0-471-70410-2.To the Māori, the star marked the beginning of the winter season. They had the same name to describe both the star and the season: Takurua. Since 1894, irregularities have been tentatively observed in the orbits of SiriusA and B with an apparent periodicity of 6–6.4years. A 1995 study concluded that such a companion likely exists, with a mass of roughly 0.05solar mass—a small red dwarf or large brown dwarf, with an apparent magnitude of more than 15, and less than 3 arcseconds from Sirius A. [51] Sirius B is 10,000 times less luminous, but a brighter X-ray source of the two. It orbits around the primary component in a wide horizontal ellipse when observed from Earth. The star has an estimated surface temperature of 25,200 K. It is the nearest known white dwarf.