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Are 2-micron absorptions and 11-micron emissions of M stars relatedThree properties of M stars are compared: (1) /3.5/ - /11/ colors, (2) two measures of 2.3-micron band absorption, and (3) two measures of 1.9-micron band absorption. We find that the 2.3-micron bands of 21 M giants and supergiants correlate with /3.5/ - /11/ colors at better than 99 per cent confidence. A comparable relation exists between the mean 1.9-micron bands and /3.5/ - /11/ colors of 23 M giants and Miras. The sum of the 1.9-micron + 2.3-micron band intensities correlates with /3.5/ - /11/ color at better than the 99.8 per cent level for 31 M stars. These relations are consistent with both CO and H2O cooling of M star boundaries. Binaries and Ia supergiants appear to depart from these relations.
Document ID
19740049369
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fay, T. D., Jr.
(Indiana University Bloomington, Ind.; Louisiana State University Observatory, Baton Rouge, La., United States)
Date Acquired
August 7, 2013
Publication Date
March 15, 1974
Publication Information
Publication: Astrophysical Journal
Volume: 188
Subject Category
Space Sciences
Accession Number
74A32119
Funding Number(s)
CONTRACT_GRANT: NGL-15-03-002
Distribution Limits
Public
Copyright
Other

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