Interferometric Observations of V1663 Aquilae (Nova Aql 2005)

Details Interferometric Observations of V1663 Aquilae (Nova Aql 2005) Interferometric Observations of V1663 Aquilae (Nova Aql 2005)

2007-10-10

arxiv.org/abs/0710.2128v1

Astronomy and Astrophysics

Astrophysics

6 Pages, Accepted for publication in ApJ

Scientific paper

10.1086/521700

We have resolved the classical nova V1663 Aql using long-baseline near-IR interferometry covering the period from 5--18 days after peak brightness. We directly measure the shape and size of the fireball, which we find to be asymmetric. In addition we measure an apparent expansion rate of 0.21 +/- 0.03 mas/day. Assuming a linear expansion model we infer a time of initial outburst approximately 4 days prior to peak brightness. When combined with published spectroscopic expansion velocities our angular expansion rate implies a distance of 8.9 +/- 3.6 kpc. This distance measurement is independent of, but consistent with, determinations made using widely available photometric relations for novae.

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