Polycyclic Aromatic Hydrocarbons Orbiting HD 233517, an Evolved Oxygen-rich Red Giant
The Astrophysical Journal2006Vol. 637(1), pp. L45–L48
Citations Over TimeTop 10% of 2006 papers
M. Jura, C. J. Bohac, B. Sargent, W. J. Forrest, J. Green, D. M. Watson, G. C. Sloan, F. Kemper, C. H. Chen, Joan Najita
Abstract
We report spectra obtained with the Spitzer Space Telescope in the X = 5-35 μm range of HD 233517, an evolved K2 III giant with circumstellar dust. For X > 13 μm, the flux is a smooth continuum that varies approximately as v-5/3. For X <13μm, although the star is oxygen-rich, PAH features produced by carbon-rich species at 6.3, 8.2, 11.3, and 12.7 μm are detected along with likely broad silicate emission near 20 μm. These results can be explained if there is a passive, flared disk orbiting HD 233517. Our data support the hypothesis that organic molecules in orbiting disks may be synthesized in situ as well as having been incorporated from the interstellar medium. © 2006. The American Astronomical Society. All rights reserved.
Related Papers
- → Low osmium solubility in silicate at high pressures and temperatures(2009)34 cited
- → Silicate anions formed in tetramethylammonium silicate methanolic solutions as studied by 29Si nuclear magnetic resonance(1989)45 cited
- → A possible explanation of immiscibility in silicate melts(1960)3 cited
- On the Way of Cultivating the Excellent Teaching Atmosphere in Nanjing Institute of PE(2008)
- Recent Advances in the Synthesis and Properties of Polymer-Layered Silicate Nanocomposite(2001)