Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...581l..55s&link_type=abstract
The Astrophysical Journal, Volume 581, Issue 1, pp. L55-L58.
Astronomy and Astrophysics
Astronomy
19
Infrared: Ism, Ism: Individual: Name: Elias 1, Ism: Individual: Alphanumeric: Hd 97048, Ism: Lines And Bands, Ism: Molecules, Methods: Laboratory
Scientific paper
The formation and size of interstellar diamonds have been investigated by infrared spectroscopy in the laboratory. Employing hot-filament chemical vapor deposition (CVD) to synthesize the interstellar analogs, we successfully reproduced the infrared emission bands of nanodiamonds around HD 97048 and Elias 1. Analysis of the infrared absorption spectra of synthetic diamond crystallites (25-700 nm) from a commercial source reveals a strong size-dependent effect. The 3.53 μm feature emerges only for particles larger than 25 nm. Our experiments suggest that the carriers of the anomalous infrared emission bands at 3.43 and 3.53 μm could be nanodiamonds that are larger than 25 nm and are formed by a CVD-like process.
Chang Hung C.
Lee I.-P.
Lee Yin-Tat
Sheu Shyh-Yang
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