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Figure 1: Examples of the fits of reference spectra to the observed magnitudes of V838 Mon. Left panel: pre-eruption and eruption phases. Right panel: decline phase. Symbols - observed magnitudes. Full curves - supergiant spectra. Dotted curves - blackbody distributions. All reference spectra have been reddened with EB-V = 0.9. The curves are labelled with the epoch of observations (days since 1 Jan. 2002). Note that the curves and the data corresponding to days 40.8, 47.6 and 72.8 ( left panel) have been shifted by -2, -4 and -6 mag, respectively, while those corresponding to days 301, 503, 861 and 1075 (right panel) have been shifted by 2, 5, 8 and 10 mag, respectively. Parameters of the fits can be found in Table 1. |
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Figure 2: Evolution of the effective temperature ( upper), luminosity ( middle) and radius ( bottom) of V838 Mon. The luminosity and radius are in solar units. The abscissa gives the logarithm of time in days counted since 1 Jan. 2002. See text for explanation of the symbols and curves (in the middle and bottom panels). |
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Figure 3:
Mass loss rate derived assuming an optically thick wind model
(see text for more details) - large symbols. Small symbols - effective
radius (the same as in Fig. 2 but plotted as
3 log
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Figure 4:
Infrared excess in pre-eruption and eruption
( left panel) as well as in decline ( right panel). Symbols -
observed magnitudes. Full curves - fitted spectra.
Dotted and dashed curves ( right panel) - stellar and dust spectral components,
respectively.
The curves are labelled with
the epoch of observations (days since 1 Jan. 2002). A downward arrow for day 258
shows the upper observational limit at 18 ![]() |
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