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2003MNRAS.344.1107H - Mon. Not. R. Astron. Soc., 344, 1107-1118 (2003/October-1)
The identification of HCN and HNC in carbon stars: model atmospheres, synthetic spectra and fits to observations in the 2.7-4.0 µm region.
HARRIS G.J., PAVLENKO Y.V., JONES H.R.A. and TENNYSON J.
Abstract (from CDS):
We fit synthetic spectra in the 2.7-4.0 µm region to observed ISO spectra of the carbon stars WZ Cas and TX Psc obtained by Aoki et al. These fits allow us to identify absorption by HNC in the spectrum of WZ Cas at 2.8-2.9 µm, and to determine new independent estimates of effective temperature and log (NC/NO). The findings reported here indicate that absorption by both HCN and HNC is needed to fully explain the observed stellar spectra and represent the first identification of HNC in a star. Q-branch absorption by the HCN Δv21, Δv31 and Δv11, Δv2 -1 bands at 3.55 and 3.86 µm, respectively, is identified in the spectrum of WZ Cas.
Abstract Copyright: 2003 RAS
Journal keyword(s): molecular data - stars: AGB and post-AGB - stars: atmospheres - stars: carbon - infrared: stars
Simbad objects: 2
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