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Title: Long-lasting super-Eddington luminosity of the classical nova V339 Del with strong dust emission
Authors: A. Skopal
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Description: The classical nova V339 Delphini was born on August 14, 2013 (= nova age 0) as a result of the explosive thermonuclear fusion on the surface of a white dwarf (WD) after accretion of the critical amount of material from its companion in a binary system. The nova was very bright, well seen by the naked eye around its maximum. Consequently, a large amount of observations has been performed from gamma-rays to the radio wavelengths, followed by a number of excellent studies by experts from all over the world. In this paper, using our original method of multiwavelength modeling the nova spectrum, we revealed new striking results: (i) At the nova age of 35 days, the WD photosphere was oblate in poles and a slow equatorially concentrated mass-outflow contained dust grains. (ii) From day 35 to 72, the nova significantly stopped-down the mass-outflow. (iii) On day 100, the co-existence of the strong dust emission and the luminous high-temperature WD confirmed the disk-like formation around the WD, where the dust can spend a long time. (iv) Our modeling revealed highly super-Eddington luminosity of the burning WD lasting, at least, for the first 100 days of the nova life. This finding represents a new challenge for theoretical modeling of the nova phenomenon.
Reference: The Astrophysical Journal, 878:28 (18pp), 2019 June 10
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Date and Time: 7.8. 2022 23:53:55 CEST
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