Spectrophotometry of Mira Ceti.

Abstract

view Abstract Citations (5) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Spectrophotometry of Mira Ceti. Scott, Roderic M. Abstract The photometry of the continuous background of the spectrum of Mira Ceti at phases between 0 and 0.6 indicates that the entire variation in the photographic magnitude is the result of the variation of tem- perature and the variation of molecular and atomic absorption. The optical density of the first TiQ band varies from 0.4 to 1.1 during this interval. The monochromatic magnitude at X 4150 agrees with the magnitudes predicted from the radiometric temperatures and thus precludes any variation produced by nonselective absorption. The study of the variation of the intensities of the absorption lines of calcium indicates a great varia- tion in the electron pressure. Log P6 varies from -2.34 at maximum light to -7.73 at minimum. This variation indicates a large change in excitation conditions, but the value at minimum agrees with that obtained from other stars of similar character. The level within the atmosphere of the source of the hydrogen emission is definitely placed beneath the level of the calcium absorption. The quantitative behavior of the emission line located within the contour of the calcium absorption line is accurately explained by this assumption Publication: The Astrophysical Journal Pub Date: January 1945 DOI: 10.1086/144690 Bibcode: 1945ApJ...101...71S full text sources ADS |