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Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..855..219t&link_type=abstract
ASTROCHEMISTRY: From Laboratory Studies to Astronomical Observations. AIP Conference Proceedings, Volume 855, pp. 219-224 (2006
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Atomic, Molecular, And Chemical, And Grain Processes, Absolute And Relative Line And Band Intensities, Vibronic, Rovibronic, And Rotation-Electron-Spin Interactions
Scientific paper
We observed a series of five or six DIBs lines with a nearly constant spacing of about 35 cm-1 around 6800 Å by using a spectrometer with a wavelength resolution of λ/Δλ=75,000. We obtained similar intensities in HD 21389, HD 41117, HD 43384, HD 198478, and HD 206165. As a candidate of these DIBs carrier, a perpendicular vibronic band of CH2X type molecules has been proposed by Glinski and Nuth (PASP, 107, 453, 1995), where X is a heavy atom or linear carbon chain. Although the 35 cm-1 intervals are interpreted by assuming only ortho lines are detected, we could find none of the spectral lines originating from para levels. We simulated the spectra of quasi-linear molecules such as HNCX, and found that a high temperature is required for explanation of the observed spectra. Thus we concluded that the carrier of series of DIBs appeared near 6800 Å is not explained by the perpendicular vibronic band of CH2X and quasi linear HNCX type molecules. Other candidates are discussed.
Civis Svatopluk
Izumiura Hideyuki
Kawaguchi Kentaro
Šedivcová Tereza
Tada H.
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