Computer Science
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006noao.prop..581c&link_type=abstract
NOAO Proposal ID #2006B-0581
Computer Science
Scientific paper
Intermediate Polars (IP's) provide key opportunities to study the accretion/outflow process in the presence of high magnetic fields, within systems still in a state of dynamical evolution. Time-resolved optical spectroscopic campaigns have shown complex accretion geometry, with several equally-consistent interpretations in some cases. Near-IR time-resolved spectroscopic have tremendous potential to unlock the secrets of these complex systems, in three key areas: (i) by allowing joint IR-optical constraints on the velocity-evolution and thus the accretion geometry, (ii) by assessing if the puzzling C-underabundance in Cataclysmic Variables as a class also extends to the IP's, and (ii) by establishing metrics which will be essential in understanding the highly-obscured IP's such as XY Ari. However, at present no time- resolved near-IR spectroscopic results for IP's have ever been published. Building on our pilot near-IR observations of line variability from a newly-discovered IP, we will conduct a systematic radial-velocity study of a selection of bright, well-studied IP's, thus providing the first constraints on their nature from near-IR velocity- maps.
Clarkson Will
Lewis Fraser
Marsh Tom
Norton Andrew
Thorstensen John
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