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Confirmation of the presence of iron hydride in sunspots and cool stars

Wing, Robert F. and Cohen, Judith and Brault, James W. (1977) Confirmation of the presence of iron hydride in sunspots and cool stars. Astrophysical Journal, 216 . pp. 659-664. ISSN 0004-637X. doi:10.1086/155507.

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A high-resolution sunspot spectrum clearly shows the presence of the 9896 Å and 8691 Å bands of iron hydride (FeH). At least 332 lines of the two bands, accounting for 80% of the lines registered in the laboratory, can be identified with certainty in the spot spectrum; most of these are unblended. Our estimate that the 9896 Å band is 2.0 ± 0.2 times stronger than the 8691 Å band supports the idea, suggested earlier by laboratory deuteride experiments, that the 9896 Å band is the (0, 0) transition. No evidence for FeH is found in the spectrum of the solar disk. Image-tube spectrograms of M dwarfs and S stars have been taken in the near-infrared at 86 Å mm^(-1) to examine the feature which Nordh, Lindgren, and Wing have proposed is due to the 9896 Å band of FeH. At this dispersion enough band structure is evident to confirm the identification in both kinds of stars.

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Cohen, Judith0000-0002-8039-4673
Additional Information:© American Astronomical Society • Provided by the NASA Astrophysics Data System. Received 1976 December 17; accepted 1977 March 7.
Subject Keywords:line identifications — molecular processes — stars : late-type — Sun : spectra — Sun : sunspots
Record Number:CaltechAUTHORS:20190529-161903214
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95909
Deposited By: George Porter
Deposited On:31 May 2019 14:53
Last Modified:16 Nov 2021 17:16

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