The Problem of U Coronae Borealis, RS Vulpeculae, and TV Cassiopeiae.
1945; IOP Publishing; Volume: 102; Linguagem: Inglês
10.1086/144776
ISSN1538-4357
Autores Tópico(s)Astronomical Observations and Instrumentation
Resumoview Abstract Citations (16) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Problem of U Coronae Borealis, RS Vulpeculae, and TV Cassiopeiae. Sahade, J. ; Struve, O. Abstract At principal minimum the spectra of U CrB and RS Vul show faint lines of Fe I, Fell, Ca i, and Sr ii, suggesting that the types of the secondaries are about A2. This confirms the discrepancy between the photometric and the spectrographic types aimounced previously. The reflection effect cannot account for this thscrepanc~, bUt the existence of a peculiarity in the structure of the H lines of U CrB near maximum radial velocity suggests that a stream of gas similar to that previously observed in AU Mon may account for the otherwise unexplained early type of the secondary spectrum. If this should be true, the eclipse would be partial, and the true spectrum of the secondary would be unobservable; the metallic lines at minimum would then be attributed to the absorption of the light of the partly eclipsed primary by the atoms of the stream Publication: The Astrophysical Journal Pub Date: November 1945 DOI: 10.1086/144776 Bibcode: 1945ApJ...102..480S full text sources ADS |
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