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Binarity of Exoplanet Host Stars
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Limits on Binarity of Exoplanet Host Stars Though there are now many hundreds of confirmed exoplanets known, the binarity of exoplanet host stars is not well understood. This is particularly true of host stars which harbor a giant planet in a highly eccentric orbit since these are more likely to hav...
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Kappa Cassiopeiae
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The Shocking Behaviour of a Speedy Star Roguish runaway stars can have a big impact on their surroundings as they plunge through the Milky Way galaxy. Their high-speed encounters shock the galaxy, creating arcs, as seen in this newly released image from NASA's Spitzer Space Telescope. In this case...
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NGC 2461
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NGC 2461 is a magnitude +11.9 star located in the constellation Lynx. The star was discovered by Bindon Blood Stoney, assistant astronomer to William Parsons, using a 182.88 cm (72 inch) speculum reflector at Birr Castle on the 20th February 1851. Right Ascension 07h 56m 26.2s, Declination Dec +56...
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NGC 2464
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NGC 2464 is a magnitude +14.2 triple star system located in the constellation Lynx. The stars were discovered by Bindon Blood Stoney, assistant astronomer to William Parsons, using a 182.88 cm (72 inch) speculum reflector at Birr Castle on the 20th February 1851. Right Ascension 07h 57m 32.3s, Dec...
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NGC 2465
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NGC 2465 is a magnitude +14.2 star located in the constellation Lynx. The star was discovered by Bindon Blood Stoney, assistant astronomer to William Parsons, using a 182.88 cm (72 inch) speculum reflector at Birr Castle on the 20th February 1851. Right Ascension 07h 57m 26.1s, Declination Dec +56...
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NGC 2471
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NGC 2471 is a magnitude +12.9 pair of stars located in the constellation Lynx. The star were discovered by Bindon Blood Stoney, assistant astronomer to William Parsons, using a 182.88 cm (72 inch) speculum reflector at Birr Castle on the 20th February 1851. Right Ascension 07h 58m 33.2s, Declinati...
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NGC 2806
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NGC 2806 is a magnitude +10.9 star located in the constellation Cancer. The star was discovered by Danish-German astronomer Heinrich Louis d'Arrest using a 27.94 cm (11 inch) f/17.5 Merz-Refractor at the Copenhagen Observatory on the 17th February 1862. The star was rediscovered by Danish-Iri...
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HD 1976
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Title: Discovery of a magnetic field in the B pulsating system HD 1976 Author: C. Neiner, A. Tkachenko, the MiMeS collaboration The presence of a magnetic field can have a strong impact on the evolution of a binary star. However, only a dozen of magnetic OB binaries are known as of today and available t...
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PNV J09553246+6903202
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ATel 5885: PNV J09553246+6903202 - A Probable Luminous Nova
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WR48a
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Title: A Chandra Grating Observation of the Dusty Wolf-Rayet Star WR48a Author: Svetozar A. Zhekov, Marc Gagne, Stephen L. Skinner We present results of a Chandra High Energy Transmission Grating (HETG) observation of the carbon-rich Wolf-Rayet (WR) star WR48a. These are the first high-resolu...
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ULAS J222711-004547
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Red skies discovered on extreme brown dwarf The brown dwarf, named ULAS J222711-004547, caught the researchers' attention for its extremely red appearance compared to "normal" brown dwarfs. Further observations with the Very Large Telescope (VLT) in Chile and the use of an innovati...
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NGC 2378
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NGC 2378 is a magnitude +12.8 double star located in the constellation Gemini. The stars were discovered by French astronomer Edouard Jean-Marie Stephan using a 80.01 cm (31.5 inch) reflector at the Marseille Observatory on the 8th February 1878. Right Ascension 07h 27m 23.9s, Declination +33...
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J065140.54+480441.6
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ATel 5854: New Large Amplitude CV in Auriga detected by MASTER
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NGC 3339
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NGC 3339 is a single star located in the constellation Sextans. NGC 3339 is near the spiral galaxy NGC 3340 The star was discovered by German astronomer Albert Marth using a 121.92 cm (48 inch) reflector at William Lassell's Tigné Point observatory in Sliema, Malta, on the 30th January 1865. Righ...
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F-type Stars
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Title: Habitability around F-type Stars Author: S. Sato, M. ****z, C. M. Guerra Olvera, D. Jack, K.-P. Schroeder We explore the general astrobiological significance of F-type main-sequence stars with masses between 1.2 and 1.5 Msun. Special consideration is given to stellar evolutionary aspe...
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