The Daily Brew

Selected astro-ph abstracts for Friday 2009 March 27

J1536+0441 and the lack of evidence for close supermassive binary black holes.
C. Martin Gaskell
arXiv:0903.4447v1
Testing Fundamental Physics with Distant Star Clusters: Analysis of Observational Data on Palomar 14.
K. Jordi, E.K. Grebel, M. Hilker, H. Baumgardt, M. Frank, P. Kroupa, H. Haghi, P. Côté, S.G. Djorgovski
arXiv:0903.4448v1
Are symmetric tidal streams possible with long-range dark-matter forces?.
Michael Kesden
arXiv:0903.4458v1
Asteroid Distributions in the Ecliptic.
Erin L. Ryan, Charles E. Woodward, Andrea Dipaolo, Jacopo Farinato, Emanuele Giallongo, Roland Gredel, John Hill, Fernando Pedichini, Richard Pogge, Roberto Ragazzoni
arXiv:0903.4479v1
The covering factor of high redshift damped Lyman-$\alpha$ systems.
N. Kanekar (1), W. M. Lane (2), E. Momjian (1), F. H. Briggs (3), J. N. Chengalur (4) ((1) National Radio Astronomy Observatory (USA); (2) Naval Research Laboratory, USA; (3) Mt. Stromlo Observatory, ANU, Australia; (4) National Centre for Radio Astrophysics, India)
arXiv:0903.4483v1
A search for HI 21cm absorption in strong MgII absorbers in the redshift desert.
N. Kanekar (1), J. X. Prochaska (2), S. L. Ellison (3), J. N. Chengalur (4) ((1) National Radio Astronomy Observatory, USA; (2) UC-Santa Cruz, USA; (3) University of Victoria, Canada; (4) National Centre for Radio Astrophysics, India)
arXiv:0903.4487v1
Imaging faint brown dwarf companions close to bright stars with a small, well-corrected telescope aperture.
E. Serabyn, D. Mawet, E. Bloemhof, P. Haguenauer, B. Mennesson, K. Wallace, J. Hickey
arXiv:0903.4488v1
Supermassive Black Holes in the Hierarchical Universe: A General Framework and Observational Tests.
Yue Shen (Princeton)
arXiv:0903.4492v1
On the radial distribution of horizontal branch stars in ngc2808.
G. Iannicola, M. Monelli, G. Bono, P.B. Stetson R. Buonanno, A. Calamida, M. Zoccali, F. Caputo, M. Castellani, C.E. Corsi, M. Dall'Ora, A. Di Cecco, S. Degl'Innocenti, I. Ferraro, M. Nonino, A. Pietrinferni, L. Pulone, P.G. Prada Moroni, M. Romaniello, N. Sanna, A.R. Walker
arXiv:0903.4531v1
On the Carriers of the 21 Micron Emission Feature in Post-Asymptotic Giant Branch Stars.
K. Zhang, B. W. Jiang, A. Li
arXiv:0903.4541v1
Effects of Dark Matter Substructures on Gravitational Lensing: Results from the Aquarius Simulations.
D. D. Xu (1), S. Mao (1), J. Wang (2,3), V. Springel (2), L. Gao (3), S. D. M. White (2), C. S. Frenk (3), A. Jenkins (3), G. Li (4), J. F. Navarro (5) ((1) Jodrell Bank Centre for Astrophysics, (2) Max-Planck Institute for Astrophysics, (3) University of Durham, (4) University of Bonn, (5) University of Victoria)
arXiv:0903.4559v1
Evolution of the Lyman-alpha Halos around High-Redshift Radio Galaxies.
Andrew W. Zirm (1), Arjun Dey (2), Mark Dickinson (2), Colin J. Norman (1) ((1) Johns Hopkins University, (2) National Optical Astronomy Observatories)
arXiv:0903.4660v1
On the origin and properties of Ultrafaint Milky Way Satellites in a LCDM Universe.
Andrea V. Maccio' (1), Xi Kang (1), Fabio Fontanot (1), Rachel S. Somerville (1,2), Sergey E. Koposov (1,3,4), Pierluigi Monaco (5,6) ((1) MPIA, Heidelberg; (2) Space Telescope Science Institute, Baltimore;(3) Institute of Astronomy, Cambridge, UK, (4) Sternberg Astronomical Institute, Moscow, Russia, (5) INAF-Osservatorio Astronomico di Trieste; (6) Dipartimento di Astronomia, Universita' di Trieste)
arXiv:0903.4681v1

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