Circumstellar acetylene in the infrared spectrum of IRC +10° 216

  title={Circumstellar acetylene in the infrared spectrum of IRC +10° 216},
  author={Stephen T. Ridgway and Donald B. Hall and Susan G. Kleinmann and Doreen A. Weinberger and Robert S. Wojslaw},
A THICK, expanding envelope of dust and gas surrounds the unusual object IRC +10° 216. Microwave studies have identified numerous molecular constituents of the envelope1, and the thermal infrared spectrum indicates the probable presence of both silicon carbide and graphite in the form of dust grains (ref. 2, and M. P. Campbell, et al., unpublished). We report here the detection of acetylene, C2H2, in the infrared spectrum. Although acetylene is expected to be an important constituent of some… 

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Medium- and high-resolution spectroscopy of U Equulei from 1 to 4 μm during 1997-2003 has revealed information about its unusual circumstellar envelope, observed previously at optical and radio

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Spectroscopy of circumstellar molecular species in the 2-14μm range provides evidence for a range of shell optical depths in the +10216 class of stars. In some cases a photospheric spectrum is

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  • B. McGuire
  • Physics, Geology
    The Astrophysical Journal Supplement Series
  • 2022
To date, 241 individual molecular species, composed of 19 different elements, have been detected in the interstellar and circumstellar medium by astronomical observations. These molecules range in

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The sections in this article are Introduction Astronomical Objects Interstellar Clouds and Evolution Star Formation Region Late-Type Stars and Planetary Nebula Cosmic Abundance Line Width


Absorption spectra and absorption cross sections of gaseous acetylene, C2H2, at 298 and 85 K were measured in the wavelength range 110–155 nm with a slit–jet system coupled to a synchrotron as a

Implications for Extraterrestrial Hydrocarbon Chemistry: Analysis of Acetylene (C2H2) and D2-acetylene (C2D2) Ices Exposed to Ionizing Radiation via Ultraviolet–Visible Spectroscopy, Infrared Spectroscopy, and Reflectron Time-of-flight Mass Spectrometry

The processing of the simple hydrocarbon ice, acetylene (C2H2/C2D2), via energetic electrons, thus simulating the processes in the track of galactic cosmic-ray particles penetrating solid matter, was

Microwave Spectra of Molecules of Astrophysical Interest. XX. Methane

The available data on methane are critically reviewed for information applicable to radio astronomy. Molecular data such as rotational constants, centrifugal distortion constants, and the distortion