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18 papers · 1 filter
Numerical Studies of Weakly Stochastic Magnetic Reconnection
G. Kowal, A. Lazarian, E. T. Vishniac +1
We study the effects of turbulence on magnetic reconnection using three-dimensional numerical simulations. This is the first attempt to test a model of fast magnetic reconnection p…
Is J 133658.3-295105 a Radio Source at z >= 1.0 or at the Distance of M 83?
Horacio Dottori, Ruben J. Diaz, Damian Mast
We present Gemini optical imaging and spectroscopy of the radio source J 133658.3-295105. This source has been suggested to be the core of an FR II radio source with two detected l…
An Alternative Origin for Hypervelocity Stars
Mario G. Abadi, Julio F. Navarro, Matthias Steinmetz
Halo stars with unusually high radial velocity ("hypervelocity" stars, or HVS) are thought to be stars unbound to the Milky Way that originate from the gravitational interaction of…
A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidates
C. J. Cyganowski, B. A. Whitney, E. Holden +12
Using images from the Spitzer GLIMPSE Legacy survey, we have identified more than 300 extended 4.5 micron sources (abbreviated EGO, Extended Green Object, for the common coding of…
The CaT strength in Seyfert nuclei revisited: analyzing young stars and non-stellar light contributions to the spectra
L. R. Vega, N. V. Asari, R. Cid Fernandes +4
In a former paper (Garcia-Rissmann et al. 2005; hereafter Paper I), we have presented spectra of 64 active, 9 normal and 5 Starburst galaxies in the region around the near-IR Calci…
On the relationship between environment and galaxy properties in clusters of galaxies
Hector J. Martinez, Valeria Coenda, Hernan Muriel
We study the correlation between different properties of bright (L>L*) galaxies in clusters and the environment in the Sloan Digital Sky Survey (SDSS). Samples of clusters of galax…