The Daily Brew
Selected astro-ph abstracts for Thursday December 22
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A size of ~1 AU for the radio source Sgr A* at the centre of the Milky
Way
Zhi-Qiang Shen, K. Y. Lo, M.-C. Liang, Paul T. P. Ho, J.-H. Zhao
Comments: 18 pages, 4 figures
Journal-ref: Nature, 438(2005)62
astro-ph/0512515
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The 21 Centimeter Background from the Cosmic Dark Ages: Minihalos and
the Intergalactic Medium before Reionization
Paul R. Shapiro, Kyungjin Ahn, Marcelo A. Alvarez, Ilian T. Iliev,
Hugo Martel, and Dongsu Ryu
Comments: 10 pages, 8 figures, submitted to ApJ
astro-ph/0512516
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The Irradiation Origin of Beryllium Radioisotopes and Other Short-lived
Radionuclides
Matthieu Gounelle, Frank H. Shu, Hsien Shang, A. E. Glassgold, K. E.
Rehm, Typhoon Lee
Comments: 18 pages, 6 figures, 2 tables. ApJ in press
astro-ph/0512517
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Filtration of atmospheric noise in narrow-field astrometry with very
large telescopes
Petro F. Lazorenko, Galina A. Lazorenko
Comments: 18 pages, 17 figures
Journal-ref: Astron.Astrophys. 427 (2004) 1127
astro-ph/0512524
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Absolute measurement of the unresolved X-ray background in the 0.5--8
keV band with Chandra
Ryan C. Hickox and Maxim Markevitch (Harvard-Smithsonian Center for
Astrophysics)
Comments: 21 pages, 16 figures, 6 tables
astro-ph/0512542
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The Oxygen Abundance of HE 1327-2326
Anna Frebel, Norbert Christlieb, John E. Norris, Wako Aoki, Martin
Asplund
Comments: 13 pages, accepted for publication in ApJL
astro-ph/0512543
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