Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216..659w&link_type=abstract
Astrophysical Journal, Part 1, vol. 216, Sept. 1, 1977, p. 659-664.
Astronomy and Astrophysics
Astrophysics
35
Cool Stars, Iron Compounds, Metal Hydrides, Solar Spectra, Stellar Spectra, Sunspots, Dwarf Stars, Infrared Stars, Line Spectra, M Stars
Scientific paper
A high-resolution sunspot spectrum clearly shows the presence of the 9896-A and 8691-A 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. An estimate that the 9896-A band is 2.0 + or - 0.2 times stronger than the 8691-A band supports the idea, suggested earlier by laboratory deuteride experiments, that the 9896-A 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 A/mm to examine the feature which Nordh, Lindgren, and Wing (1977) have proposed is due to the 9896-A band of FeH. At this dispersion enough band structure is evident to confirm the identification in both kinds of stars.
Brault James W.
Cohen Julien
Wing Robert F.
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