# Detection of C60 and C70 in a Young Planetary Nebula

@article{Cami2010DetectionOC,
title={Detection of C60 and C70 in a Young Planetary Nebula},
author={Jan Cami and Jeronimo Bernard-Salas and Els Peeters and Sarah E. Malek},
journal={Science},
year={2010},
volume={329},
pages={1180 - 1182}
}
• Published 3 September 2010
• Physics
• Science
Cosmic Fullerenes Since the discovery of the buckminsterfullerene C60 in laboratory experiments, it has been speculated that fullerenes could form abundantly in carbon-rich evolved stars and, because of their stability, survive the harsh radiation field in the interstellar medium as a gas-phase species. Cami et al. (p. 1180; published online 22 July; see the Perspective by Ehrenfreund and Foing) have detected large amounts of fullerenes in a peculiar planetary nebula with an extremely hydrogen…
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## References

SHOWING 1-10 OF 36 REFERENCES

### Infrared Space Observatory's Discovery of C4H2, C6H2, and Benzene in CRL 618

• Physics, Chemistry
• 2001
We report on the detection with the Infrared Space Observatory (ISO), for the first time in the circumstellar medium, of the polyacetylenic chains C4H2 and C6H2 and of benzene (C6H6) in the direction

### UNUSUAL DUST EMISSION FROM PLANETARY NEBULAE IN THE MAGELLANIC CLOUDS

• Physics
• 2009
We present a Spitzer Space Telescope spectroscopic study of a sample of 25 planetary nebulae (PNe) in the Magellanic Clouds (MCs). The low-resolution modules are used to analyze the dust features

### Circumstellar envelopes and Asymptotic Giant Branch stars

Summary. Red giants are sometimes surrounded by envelopes, the result of the ejection of stellar matter at a large rate ( $\dot M> 10^{-7}M_\odot$/yr) and at a low velocity (10 km/s). In this review

### SILICON CARBIDE ABSORPTION FEATURES: DUST FORMATION IN THE OUTFLOWS OF EXTREME CARBON STARS

• Physics
• 2009
Infrared carbon stars without visible counterparts are generally known as extreme carbon stars. We have selected a subset of these stars with absorption features in the 10–13 μm range, which has been

### The Search for Interstellar C60

The optical region of a number of reddened O-type stars has been examined on Keck I HIRES spectrograms (R = 45,000) for evidence of interstellar C60. No absorption features were detected near the

### Formation of polycyclic aromatic hydrocarbons in circumstellar envelopes

• Physics
• 1989
Production of polycyclic aromatic hydrocarbons in carbon-rich circumstellar envelopes was investigated using a kinetic approach. A detailed chemical reaction mechanism of gas-phase PAH formation and

### He, C, N, and O abundances in an ensemble of galactic planetary nebulae

• Physics
• 2009
The He, C, N, and O abundances in more than 120 planetary nebulae (PNe) of our Galaxy and the Magellanic Clouds have been redetermined by analyzing new PNe observations. The characteristics of PNe

### Detection of two interstellar absorption bands coincident with spectral features of C60+

• Physics
Nature
• 1994
MORE than a hundred well-defined absorption bands, arising from diffuse gas in the interstellar medium, have been observed in the visible and near-infrared spectra of stars 1–4. The identity of the

### Molecular survey of CRL618

• Physics
• 2007
We present the complete data set, model and line identification of a survey of the emission from the C-rich protoplanetary nebula CRL 618 performed with the IRAM-30m telescope in the following