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Trumpler 14
(Preview)
Stellar Family Portrait Takes Imaging Technique to New Extremes The young star cluster Trumpler 14 is revealed in another stunning ESO image. The amount of exquisite detail seen in this portrait, which beautifully reveals the life of a large family of stars, is due to the Multi-conjugate Adaptive...
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T Andromedae
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Maxima of long period variable T Andromedae on the 8th April, 2010 Magnitude: 8.5-13.8 Type: Mira Position (2000): RA 00 22 23.1462, Dec +26 59 45.768
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Messier 67
(Preview)
Title: Deep 2MASS Photometry of M67 and Calibration of the Main Sequence J-Ks Colour Difference as an Age Indicator Authors: Ata Sarajedini, Aaron Dotter, Allison Kirkpatrick We present an analysis of Two Micron All Sky Survey (2MASS) calibration photometry of the old open cluster M67 (NGC 2682)...
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Sagittarius A*
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(Preview)
There is some evidence, though yet unconfirmed, that Sagittarius A*--the supermassive black hole at the Galactic centre--emits its radio waves modulated with a ~100-day period.
What is intriguing abou...
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62
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Stellar magnetic fields
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Title: Toroidal vs. poloidal magnetic fields in Sun-like stars: a rotation threshold Authors: P. Petit, B. Dintrans, S.K. Solanki, J.-F. Donati, M. Auriere, F. Lignieres, J. Morin, F. Paletou, J. Ramirez, C. Catala, R. Fares (Version v2) From a set of stellar spectropolarimetric observations,...
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Messier 92
(Preview)
Messier 92 (also known as M92 or NGC 6341) is a globular cluster of stars in the northern constellation of Hercules. It is visible to the naked eye under very good conditions. Read more
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Blobrana
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Kim 3
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Title: Kim 3: an Ultra-faint Star Cluster in the Constellation of Centaurus Author: Dongwon Kim, Helmut Jerjen, Dougal Mackey, Gary S Da Costa, Antonino P Milone We report the discovery of an ultra-faint star cluster in the constellation of Centaurus. This new stellar system, Kim 3, features a hal...
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Messier 34
(Preview)
Messier 34 (also M 34, NGC 1039 and OCL 382) is a magnitude +5.5 open star cluster located 1,500 light-years away in the constellation Perseus. The cluster was probably discovered by Italian astronomer Giovanni Battista Hodierna with a with a 20x Galilean telescope in the castle of his patron Carl...
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Blue straggler stars
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(Preview)
Title: Blue straggler stars in dwarf spheroidal galaxies Authors: M. Mapelli (1), E. Ripamonti (2), E. Tolstoy (2), S. Sigurdsson (3), M. J. Irwin (4), G. Battaglia (2) ((1) University of Zürich, (2) Kapteyn Astronomical Institute, University of Groningen, (3) Pennsylvania State University, (...
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18
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Alpha Persei Cluster
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Title: XMM-Newton Observation of the alpha Persei Cluster Authors: Ignazio Pillitteri, Nancy Remage Evans, Scott J. Wolk, Megan Bruck Syal We report on the analysis of an archival observation of part of the alpha Persei cluster obtained with XMM-Newton. We detected 102 X-ray sources in the band 0...
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NGC 2193
(Preview)
NGC 2193 (also ESO 86-SC57) is a magnitude +13.4 open star cluster located in the Large Magellanic Cloud in the constellation Dorado. The cluster was discovered by John Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at at Feldhausen, Claremont, Cape Town, on the 3rd December 1834. Ri...
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NGC 2509
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NGC 2509 (also ESO 561-SC7 and OCL 630) is a magnitude +9.3 open star cluster located 2975±49 light-years away in the constellation Puppis. The cluster was discovered by the German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector in Datchet, on the 3rd Dece...
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Messier 10
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Messier 10 or M10 (also designated NGC 6254) is a globular cluster of stars in the equatorial constellation of Ophiuchus. Read more Spoiler
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UltraCool White Dwarf
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COMBO-17 J114356.08-0144032
Christian Wolf of the University of Oxford has discovered a rare Ultra-cool white dwarf.
Only seven of these ultra cool white dwarfs, with surface temperatures below 4,000 kelvins, were known to exist before.
Regular white dwarfs are dead star...
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12
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NGC 2129
(Preview)
NGC 2129 (also Collinder 77 and OCl 467) is a magnitude +6.7 open cluster located ~7176 light-years-away inside the Local spiral arm in the constellation Gemini. It has an angular distance of 2.5 arcminutes that corresponds to a diameter of about 10.4 light years. NGC 2129 is a very young cluster who...
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