2001/03/23 by David L. Lambert, N. Kameswara Rao, Gajendra Pandey +1 · 4 citations
Chemistry · Physics and Astronomy · #Astrophysics and Star Formation Studies #Fullerene Chemistry and Applications #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/321504
11 pages with 2 tables and 4 figures in ApJ print page form. Accepted for publication in ApJ
arxiv created 2001/03/23 · openalex publication_date 2001/07/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
Infrared Space Observatory 3-25 μm spectra of the R Coronae Borealis stars V854 Cen, R CrB, and RY Sgr are presented and discussed. Sharp emission features coincident in wavelength with the well-known unidentified emission features are present in the spectrum of V854 Cen but not in the spectra of R CrB and RY Sgr. Since V854 Cen is not particularly hydrogen-poor and has 1000 times more hydrogen than the other stars, the emission features are probably from a carrier containing hydrogen. There is a correspondence between the features and the emission from laboratory samples of hydrogenated amorphous carbon. A search for C 60 in emission or absorption proved negative. Amorphous carbon particles account for the broad emission features seen between 6 and 14 μm in the spectrum of each star.