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W3100537037 abstract "We present a spectroscopic monitoring of the transient nova V4745 Sagittarii (Nova Sgr 2003 #1) covering ten months after its discovery. During this period the light curve showed a well expressed transient phase in the form of six rebrightenings, and the presented dataset is one of the best spectroscopic coverages of a classical nova during the transition phase. Low- and medium-resolution spectra revealed that the majority of spectral lines switched back to strong P-Cyg profiles during the mini-outbursts, similar to the spectra just after the major eruption. We interpret the observed phenomena as evidence for “echo-outbursts” resulting in episodes of secondary mass-ejections and propose that the transition phase in classical novae is driven by repetitive instabilities of the hydrogen shell burning on the surface of the white dwarf. From the available light curve data we estimate the absolute magnitude of the system of about . All spectrophotometric evidence point toward a very low () interstellar reddening, leading to a rough distance estimate of V4745 Sgr ()." @default.
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W3100537037 date "2004-12-17" @default.
W3100537037 modified "2023-09-25" @default.
W3100537037 title "Spectroscopic monitoring of the transition phase in nova V4745 Sgr" @default.
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W3100537037 doi "https://doi.org/10.1051/0004-6361:20035751" @default.
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