A multiwavelength light curve analysis of the very fast nova V1723 Sco

We have analyzed multiwavelength light curves of the very fast nova V1723 Sco, based on our fully self-consistent nova explosion models. The time-stretching method gives the distance modulus in the V band of (m-M) V = 15.3 plus or minus 0.2. Then the absolute V magnitude reaches M V, max= m V, max - (m-M) V= 6.77 - 15.3 plus or minus 0.2 = -8.5 plus or minus 0.2. Using our fully self-consistent nova outburst model combined with the optically thick winds on a 1.25 M white dwarf accreted by a mass accretion rate of acc=1 times 10-9 M yr-1, we successfully reproduce the overall V light curve with a free-free emission model as well as the supersoft X-ray light curve with a blackbody approximation model. The epoch of the first GeV gamma-ray detection is almost coincident with the epoch of our model V peak. This supports the shock formation mechanism that a strong shock arises soon after the optical V maximum far outside the WD photosphere. We conclude that the shocked shell is optically thin.