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SU Ursae Majoris
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There are three subtypes of U Geminorum star (UG):SS Cygni stars (UGSS), which increase in brightness by 2-6 mag in V in 1-2 days, and return to their original brightnesses in several subsequent days.SU Ursae Majoris stars (UGSU), which have brighter and longer "supermaxima" outburst...
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HD 15407
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Title: The Age of the HD 15407 System and the Epoch of Final Catastrophic Mass Accretion onto Terrestrial Planets around Sun-like Stars Authors: C. Melis (1), B. Zuckerman (2), Joseph H. Rhee (2), Inseok Song (3) ((1) UC San Diego, (2) UCLA, (3) University of Georgia) From optical spectroscopic mea...
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Be stars
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Title: Magnetic fields in classical Be stars Authors: R. Yudin, S. Hubrig, M. Pogodin, I. Savanov, M. Schoeller, G. Peters, M. Cure We report the results of our study of magnetic fields in a sample of Be stars using spectropolarimetric data obtained at the European Southern Observatory with the mul...
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carbon-dominated white dwarf stars
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Astronomers have discovered white dwarf stars with pure carbon atmospheres. These stars possibly evolved in a sequence astronomers didn't know before. They may have evolved from stars that are not quite massive enough to explode as supernovae but are just on the borderline. All but the most massi...
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Kemble's Cascade
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Kemble's Cascade (Kemble 1), located in the constellation Camelopardalis, is an asterism - a pattern created by unrelated stars. It is an apparent straight line of more than 20 colourful 5th to 10th magnitude stars over a distance of approximately five moon diameters, and the open cluster NGC 1502...
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PSR J1141-6545
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Title: Gravitational-radiation losses from the pulsar-white-dwarf binary PSR J1141-6545 Authors: N. D. Ramesh Bhat, Matthew Bailes, Joris P. W. Verbiest Pulsars in close binary orbit around another neutron star or a massive white dwarf make ideal laboratories for testing the predictions of g...
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Fullerene Planetary Nebulae
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Title: An Infrared Study of Fullerene Planetary Nebulae Authors: D. A. Garcia-Hernandez, E. Villaver, P. Garcia-Lario, J. A. Acosta-Pulido, A. Manchado, L. Stanghellini, R. A. Shaw, F. Cataldo We present a study of 16 PNe where fullerenes have been detected in their Spitzer spectra. This large s...
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Molecular clouds
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Title: A search for co-evolving ion and neutral gas species in prestellar molecular cloud cores Authors: Konstantinos Tassis (MPIfR), Talayeh Hezareh (MPIfR), Karen Willacy (JPL) Comparison of linewidths of spectral line profiles of ions and neutral molecules have been recently used to estim...
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G345.01+1.79
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Title: Discovery of Two New Class II Methanol Maser Transitions in G345.01+1.79 Authors: S. P. Ellingsen (1), A. M. Sobolev (2), D. M. Cragg (3), P. D. Godfrey (3) ((1) University of Tasmania, (2) Ural State University, (3) Monash University) We have used the Swedish ESO Submillimetre Telescope (S...
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h and chi Persei
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Title: Physical Properties of the B and Be Star Populations of h and chi Persei Authors: Amber N. Marsh Boyer, M. Virginia McSwain, Christina Aragona, Benjamin Ou-Yang (Lehigh University) We present a study of the B and Be star populations of the Double Cluster h and chi Persei. Blue optical spectro...
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Hot DB White Dwarfs
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Title: Hot DB White Dwarfs from the Sloan Digital Sky Survey
Authors: Daniel J. Eisenstein, James Liebert, Detlev Koester, S.J. Kleinmann, Atsuko Nitta, Paul S. Smith, J.C. Barentine, Howard J. Brewington, J. Brinkmann, Michael Harvanek, Jurek Krzesinski, Eric H. Neilsen Jr...
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Extrasolar Planet Migration
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A Decade of Extrasolar Planets around Normal Stars
Title: Planetary migration
Authors: Philip J. Armitage, W. K. M. Rice
Gravitational torques between a planet and gas in the protoplanetary disk result in orbital migration of the planet, and are likely to play an impor...
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Triangulum stream
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Title: A Cold Milky Way Stellar Stream in the Direction of Triangulum Authors: Ana Bonaca, Marla Geha, Nitya Kallivayalil We present evidence for a new Milky Way stellar tidal stream in the direction of the Andromeda and Triangulum (M31 and M33) galaxies. Using a matched-filter technique, we sear...
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SNR G290.1-0.8
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Title: On the origin of the jet-like radio/X-ray morphology of G290.1-0.8 Authors: Federico García (1,2), Jorge A. Combi (1,2), Juan F. Albacete-Colombo (3), Gustavo E. Romero (1,2), Fabrizio Bocchino (4), Javier López-Santiago (5) ((1) IAR-CONICET, Argentina, (2) FCAG-UNLP, Argentina, (3...
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G54.1+0.3
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A new image from NASA's Chandra and Spitzer space telescopes shows the dusty remains of a collapsed star. The dust is flying past and engulfing a nearby family of stars. It shows the Chandra X-ray Observatory data in blue, and data from the Spitzer Space Telescope in green (shorter wavelength) and re...
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