Wetensch. publicatieFaculteit der Wiskunde en Natuurwetenschappe

Ehrenfreund, P.

Foing, B.H.

NARCIS 

Search for fullerenes and PAHs in the diffuse interstellar medium

Leiden University Scholary Publications

Abstract. Recent studies suggest carbon-containing moleGuIes as the best candidates for carriers of the unidentified diffuse interstellar bands (DIBs),  con-sidering their abundance and ability to form stable bonds in interstellar space. We have searched for new DIBs in the near-IR and have detected two new dilfuse bands that are consistent with laboratory measure-ments of C &amp; in a neon matrix. Criteria for this possible identification are discussed. From these observations and the DIB measured absorption, we estimate that up to 0.9 % of interstehe carbon could be in the form of C&amp;,  We also searched for polycyclic aromatic hydro-carbon (PAH) cations and have derived corresponding limits for the presence of the coronene Cz4Hkz and ova-lene C&amp;I &amp; cations in space. We have studied the ion-ization properties of these PAH cations, which could explain their selective destruction. From these results we discuss the role of fuller-en &amp;  and PAHs as possible DIB carriers. Diffuse interstellar bands, polycyclic aromatic hydrocarbons and fullerenes Astronomical observations to date have revealed 150 diffuse interstellar bands (DIBs)  at wavelengths ranging from the blue part of the visible spectrum to the near-I

P. Ehrenfreund

B. H. Foing

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Search for fullerenes and PAHs in the diffuse interstellar medium

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Leiden University Scholary Publications

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