Interferometric Observations of RS Ophiuchi and the Origin of the Near-IR Emission

Details Interferometric Observations of RS Ophiuchi and the Origin of the Near-IR Emission Interferometric Observations of RS Ophiuchi and the Origin of the Near-IR Emission

2006-12-04

arxiv.org/abs/astro-ph/0612099v1

Astrophys.J.658:520-524,2007

Astronomy and Astrophysics

Astrophysics

17 pages, 4 figures. Accepted for publication in ApJ

Scientific paper

10.1086/511414

We report observations of the recurrent nova RS Oph using long-baseline near-IR interferometry. We are able to resolve emission from the nova for several weeks after the February 2006 outburst. The near-IR source initially expands to a size of approximately 5 milli-arcseconds. However, beginning around day 10 the IR source appears to begin to shrink, reaching approximately 2 milli-arcseconds by day 100. We combine our measured angular diameters with previously available interferometric and photometric data to derive an emission measure for the source, and hence are able to determine the mass-loss rate of the nova in the days following the outburst.

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