EDP Sciences
Free access
Volume 409, Number 1, October I 2003
Page(s) 159 - 161
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20031051

A&A 409, 159-161 (2003)
DOI: 10.1051/0004-6361:20031051

Infrared spectra of ZrC presolar grain analogues

Y. Kimura and C. Kaito

Department of Nanophysics in Frontier Project, Ritsumeikan University, Kusatsu-shi, Shiga 525-8577, Japan
    e-mail: kaito@se.ritsumei.ac.jp
(Received 4 March 2003 / Accepted 16 June 2003)

The origins of spectral feature of stellar source are identified on the basis of laboratory studies. Although ZrC grains were identified as the crystalline presolar grains in meteorites, the spectral data of ZrC grains have not been measured in the laboratory. Therefore, ZrC grains with the same size as the presolar grains were produced in the laboratory. It has been found that the infrared spectrum of ZrC grains shows broad absorption features at 9.4 and 12.4 $\mu$m.

Key words: stars: AGB and post-AGB -- stars: carbon -- stars: circumstellar matter -- ISM: general -- infrared: ISM -- infrared: stars

Offprint request: Y. Kimura, rp092955@se.ritsumei.ac.jp

© ESO 2003