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Messier 41
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M41, A Winter Favourite Four degrees due south of Sirius, you'll find the fine open star cluster M41. With a mix of hot blue-white stars and a few red giants, this cluster presents a range of contrasting colour and brightness. In dark skies, you can see this cluster with the naked eye. But it looks be...
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Blue Hook Stars
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Title: Blue Hook Stars in Globular Clusters Authors: A. Dieball, C. Knigge, T. J. Maccarone, K. S. Long, D. C. Hannikainen, D. Zurek, M. Shara Blue hook (BHk) stars are a rare class of horizontal branch stars that so far have been found in only very few Galactic globular clusters (GCs). The dominant me...
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NGC419
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Title: Discovery of two distinct red clumps in NGC419: a rare snapshot of a cluster at the onset of degeneracy Authors: Leo Girardi (1), Stefano Rubele (1,2), Leandro Kerber (3) ((1) Oss. Astron. Padova, (2) Dip. Astron. Padova (3), IAG-USP, Sao Paulo) Colour-magnitude diagrams (CMD) of the SMC st...
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HD 126367
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Washington Double Star catalogue number 14255-1958 Lunar Occultation (D) of quadruple star ZC2066 Click to Play | View Details 20x70 binoculars can split this star in the constellation Libra, and reveal two blue stars. Apparent magnitude: 6.61 Distance: 142.653 parsecs Position (J2000...
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BD+20 307
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A team of American astronomers discovered that two terrestrial planets underwent a collision only a few hundred thousand years ago. They were studying what was presumably a very dusty main sequence star in an attempt to determine its age. During this time independent research revealed this star w...
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Supersonic Cloud Collision
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Title: Supersonic Cloud Collision-II Authors: S. Anathpindika In this, second paper of the sequel of two papers, we present five SPH simulations of fast head-on cloud collisions and study the evolution of the ram pressure confined gas slab. Anathpindika (2008) (hereafter paper I) considered hi...
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M giant binaries
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Title: Spectroscopic binaries among Hipparcos M giants I. Data, orbits, and intrinsic variations Authors: B. Famaey, D. Pourbaix, A. Frankowski, S. Van Eck, M. Mayor, S. Udry, A. Jorissen This paper is a follow-up of the vast effort to collect radial velocity data for stars belonging to the Hippar...
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Brown Dwarf LS-RCr A1
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Title: Uncovering the Outflow Driven by the Brown Dwarf LS-RCr A1: H-alpha as a Tracer of Outflow Activity in Brown Dwarfs Authors: E.T. Whelan, T.P. Ray, F. Bacciotti It is now apparent that classical T Tauri-like outflows commonly accompany the formation of young brown dwarfs. To date two optica...
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Lynds 1622
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Title: A Limit on the Polarised Anomalous Microwave Emission of Lynds 1622 Authors: B.S. Mason, T. Robishaw, C. Heiles, D. Finkbeiner, C. Dickinson The dark cloud Lynds 1622 is one of a few specific sites in the Galaxy where, relative to observed free-free and vibrational dust emission, there is a c...
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CSS 081231:071126+440405
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Newly discovered eclipsing cataclysmic variable CSS 081231:071126+440405. Date: 2009 01 02 Magnitude: 15.2 - ? Period: 0.0813 days Satellite period: unknown Type: AM Her subtype Position(2000): RA=07 11 26.0, Dec=+44°04'05.0"
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IQ Eridani
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The new cataclysmic variable IQ Eridani is still in outburst. The new outburst was discovered on the 20th December, 2008, by L. Monard. Date: 2008 12 11 Magnitude: 11.8 - ? Period: unknown Satellite period: unknown Type: unknown Position(2000): RA: 02 55 37.94 , Dec: -22 47 02.3
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White Dwarf GD66
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Title: Spitzer Planet Limits around the Pulsating White Dwarf GD66 Authors: Fergal Mullally, William T. Reach, Steven Degennaro, Adam Burrows We present infrared observations in search of a planet around the white dwarf, GD66. Time-series photometry of GD66 shows a variation in the arrival tim...
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IGR J16207-5129
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Title: An XMM-Newton Spectral and Timing Study of IGR J16207-5129: An Obscured and Non-Pulsating HMXB Authors: John A. Tomsick (SSL/UCB), Sylvain Chaty (AIM - Univ. Paris VII and CEA Saclay), Jerome Rodriguez (AIM - Univ. Paris VII and CEA Saclay), Roland Walter (ISDC, Observatoire de Geneve), P...
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EE Cephei
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Every 5.6 years, EE Cephei is eclipsed by an unseen companion. The eclipse of the 10.9-magnitude long period eclipsing binary in the constellation Cepheus lasts 17 days. The long period variability of B5 star EE Cephei was first identified by the Italian astronomer Romano in 1956. The star syste...
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2MASS J09393548-2448279
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The two faintest star-like objects ever found, a pair of twin "brown dwarfs" each just a millionth as bright as the sun, have been spotted by a team led by MIT physicist Adam Burgasser. "These brown dwarfs are the lowest power stellar light bulbs in the sky that we know of" - Adam B...
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