A pr 2 00 7 Infrared High - Resolution Spectroscopy of Post - AGB Circumstellar Disks . I . HR 4049 – The Winnowing Flow Observed ?
نویسندگان
چکیده
High-resolution infrared spectroscopy in the 2.3-4.6 μm region is reported for the peculiar A supergiant, single-lined spectroscopic binary HR 4049. Lines from the CO fundamental and first overtone, OH fundamental, and several H2O vibration-rotation transitions have been observed in the near-infrared spectrum. The spectrum of HR 4049 appears principally in emission through the 3 and 4.6 μm region and in absorption in the 2 μm region. The 4.6 μm spectrum shows a rich ‘forest’ of emission lines. All the spectral lines observed in the 2.3-4.6 μm spectrum are shown to be circumbinary in origin. The presence of OH and H2O Operated by Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation
منابع مشابه
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