A Prediction of Supersoft X-Ray Phase of Classical Nova V5583 Sagittarii

Details A Prediction of Supersoft X-Ray Phase of Classical Nova V5583 Sagittarii A Prediction of Supersoft X-Ray Phase of Classical Nova V5583 Sagittarii

2009-12-27

arxiv.org/abs/0912.5056v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 2 figures, submitted to the Astrophysical Journal, Letters

Scientific paper

We have observed the fast nova V5583 Sagittarii with five B, V, y, R_C, and I_C bands, and found that these multi-band light curves are almost identical with those of V382 Vel 1999 until at least 100 days after outburst. A supersoft X-ray phase of V382 Vel was detected with BeppoSAX about six months after outburst. V5583 Sgr outbursted a few days ago the discovery on 2009 August 6.5 UT near its optical peak. From a complete resemblance between these two nova light curves, we expect a supersoft X-ray phase of V5583 Sgr six months after outburst. Detection of supersoft X-ray turn-on/turnoff dates strongly constrain the evolution of a nova and, as a result, mass range of the WD. For a timely observation of a supersoft X-ray phase of V5583 Sgr, we have calculated nova outburst evolution based on the optically thick wind theory, which predicts the supersoft X-ray phase: it will most probably start between days 100 and 140 and continue until days 200-240 after outburst. We strongly recommend multiple observations during 2009 December, and 2010 January, February, and March to detect the turn-on and turnoff times of the supersoft X-ray phase of V5583 Sgr.

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