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Ba II lines as luminosity indicators: s‐Cepheids and non‐variable supergiants
Author(s) -
Andrievsky S. M.
Publication year - 1998
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2123190405
Subject(s) - cepheid variable , supergiant , astrophysics , physics , blue supergiant , luminosity , instability strip , amplitude , red supergiant , astronomy , stars , optics , galaxy
Abstract Ba II line equivalent widths appear to be well correlated with the absolute magnitudes for yellow supergiants. Two Ba II lines 5853.6 Å and 6141.7 Å were applied for investigation of the possible relation between their equivalent widths and M v for small‐amplitude Cepheids and non‐variable supergiants.