Abstract
view Abstract Citations (3) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Spectral and luminosity variation of long-period red variable stars. Celis S., L. Abstract An analysis of the visual (V) apparent-magnitude observations with simultaneous determination of the spectral subtype (S) of a long-period type Me stars, mainly Mira variables, is presented. For each star, there is a linear correlation between V and S (dMV = GdS, σG = 0.25). For a total of 16 stars, the slopes G were determined in the range of 0.30 to 2.11 mag per spectral subtype. For any moment of observation, the absolute magnitude obeys a linear relation MV = MVa+G(S-Sa), where MVa and Sa are the absolute magnitudes and spectrum at maximum light, respectively. Thus, it is possible to conclude that the instantaneous MV of any given Mira star depends only on the physical characteristics that involve the instantaneous spectral subtype S. Moreover, a best estimation of MVa is given by the function MV(P, Sa), where P is the period. Publication: The Astronomical Journal Pub Date: February 1986 DOI: 10.1086/114019 Bibcode: 1986AJ.....91..405C Keywords: Red Giant Stars; Stellar Luminosity; Stellar Spectra; Variable Stars; Correlation; Mira Variables; Semiregular Variable Stars; Stellar Color; Stellar Magnitude; Astrophysics full text sources ADS | data products SIMBAD (16)
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