Solid-phase C60 in the peculiar binary XX Oph?
Article first published online: 7 FEB 2012
© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Monthly Notices of the Royal Astronomical Society: Letters
Volume 421, Issue 1, pages L92–L96, March 2012
How to Cite
Evans, A., van Loon, J. Th., Woodward, C. E., Gehrz, R. D., Clayton, G. C., Helton, L. A., Rushton, M. T., Eyres, S. P. S., Krautter, J., Starrfield, S. and Wagner, R. M. (2012), Solid-phase C60 in the peculiar binary XX Oph?. Monthly Notices of the Royal Astronomical Society: Letters, 421: L92–L96. doi: 10.1111/j.1745-3933.2012.01213.x
- Issue published online: 29 FEB 2012
- Article first published online: 7 FEB 2012
- Accepted 2011 December 22. Received 2011 December 7; in original form 2011 June 23
- binaries: symbiotic;
- circumstellar matter;
- stars: individual: XX Oph;
- infrared: stars
We present infrared spectra of the binary XX Oph obtained with the Infrared Spectrograph on the Spitzer Space Telescope. The data show some evidence for the presence of solid C60– the first detection of C60 in the solid phase – together with the well-known ‘unidentified infrared’ emission features. We suggest that, in the case of XX Oph, the C60 is located close to the hot component, and that in general it is preferentially excited by stars having effective temperatures in the range 15 000–30 000 K. C60 may be common in circumstellar environments, but unnoticed in the absence of a suitable exciting source.