THE FORMATION OF FULLERENES: CLUES FROM NEW C60, C70, AND (POSSIBLE) PLANAR C24 DETECTIONS IN MAGELLANIC CLOUD PLANETARY NEBULAE

@article{GarcaHernndez2011THEFO,
  title={THE FORMATION OF FULLERENES: CLUES FROM NEW C60, C70, AND (POSSIBLE) PLANAR C24 DETECTIONS IN MAGELLANIC CLOUD PLANETARY NEBULAE},
  author={Domingo An{\'i}bal Garc{\'i}a-Hern{\'a}ndez and Susana Iglesias-Groth and J. A. Acosta-Pulido and Arturo Manchado and Pedro Garcı́a-Lario and Letizia Stanghellini and Eva Villaver and Richard A. Shaw and Franco Cataldo},
  journal={The Astrophysical Journal Letters},
  year={2011},
  volume={737}
}
We present 10 new Spitzer detections of fullerenes in Magellanic Cloud Planetary Nebulae, including the first extragalactic detections of the C70 molecule. These new fullerene detections together with the most recent laboratory data permit us to report an accurate determination of the C60 and C70 abundances in space. Also, we report evidence for the possible detection of planar C24 in some of our fullerene sources, as indicated by the detection of very unusual emission features coincident with… 

Figures and Tables from this paper

A search for hydrogenated fullerenes in fullerene-containing planetary nebulae

Detections of C60 and C70 fullerenes in planetary nebulae (PNe) of the Magellanic Clouds and of our own Galaxy have raised the idea that other forms of carbon such as hydrogenated fullerenes

FULLERENES AND PROTO-FULLERENES IN INTERSTELLAR CARBON DUST

Laboratory spectra of hydrogenated amorphous carbon (HAC) particles prepared under a variety of conditions show spectral features at 7.05, 8.5, 17.4, and 18.9 μm (1418, 1176, 575, and 529 cm−1) that

INFRARED STUDY OF FULLERENE PLANETARY NEBULAE

We present a study of 16 planetary nebulae (PNe) where fullerenes have been detected in their Spitzer Space Telescope spectra. This large sample of objects offers a unique opportunity to test

A SEARCH FOR NEAR INFRARED BANDS OF THE FULLERENE CATION C IN THE PROTOPLANETARY NEBULA IRAS 01005+7910

IRAS 01005+7910 is a carbon-rich protoplanetary nebula with a recently reported detection of mid-IR vibrational transitions of the fullerene C60 by Zhang and Kwok. We present new high spectral

Infrared spectroscopy of fullerene C60/anthracene adducts

Recent Spitzer Space Telescope observations of several astrophysical environments such as Planetary Nebulae, Reflection Nebulae, and R Coronae Borealis stars show the simultaneous presence of

Search for Hydrogenated C60 (Fulleranes) in Circumstellar Envelopes

The recent detection of fullerene (C60) in space and the positive assignment of five diffuse interstellar bands to reinforce the notion that fullerene-related compounds can be efficiently formed in

A search for diffuse bands in fullerene planetary nebulae: evidence of diffuse circumstellar bands

Large fullerenes and fullerene-based molecules have been proposed as carriers of diffuse interstellar bands (DIBs). The recent detection of the most common fullerenes (C60 and C70) around some

Diffuse interstellar bands in fullerene planetary nebulae: the fullerenes - diffuse interstellar bands connection

We present high-resolution (R∼15,000) VLT/UVES optical spectra of two planetary nebulae (PNe; Tc 1 and M 1-20) where C60 (and C70) fullerenes have already been found. These spectra are of hi

ON THE EXCITATION AND FORMATION OF CIRCUMSTELLAR FULLERENES

We compare and analyze the Spitzer mid-infrared spectrum of three fullerene-rich planetary nebulae in the Milky Way and the Magellanic Clouds: Tc1, SMP SMC 16, and SMP LMC 56. The three planetary

A Catalog of Diffuse Interstellar Bands in Fullerene-Containing Planetary Nebulae

Abstract Large fullerenes and fullerene-based molecules have been proposed as carriers of diffuse interstellar bands (DIBs). The recent detection of the most common fullerenes (C60 and C70) around
...

References

SHOWING 1-10 OF 43 REFERENCES

FORMATION OF FULLERENES IN H-CONTAINING PLANETARY NEBULAE

Hydrogen depleted environments are considered an essential requirement for the formation of fullerenes. The recent detection of C60 and C70 fullerenes in what was interpreted as the hydrogen-poor

Detection of C60 and C70 in a Young Planetary Nebula

The environment of Tc 1, a peculiar planetary nebula whose infrared spectrum shows emission from cold and neutral C60 and C70, is studied, indicating that if the conditions are right, fullerenes can and do form efficiently in space.

Polycyclic Aromatic Hydrocarbons and Fullerenes as Decomposition Products of Hydrogenated Amorphous Carbon

The gaseous products evolved from solid hydrogenated amorphous carbon (HAC) under UV irradiation have been sampled using time of flight (TOF) mass spectrometry. A notable feature is the appearance of

ARE C60 MOLECULES DETECTABLE IN CIRCUMSTELLAR SHELLS OF R CORONAE BOREALIS STARS?

The hydrogen-poor, helium-rich, and carbon-rich character of the gas around R Coronae Borealis (RCB) stars has been suggested to be a site for formation of C60 molecules. This suggestion is not

A search for C60 in carbonaceous chondrites.

Infrared spectroscopy and integrated molar absorptivity of C60 and C70 fullerenes at extreme temperatures

The detection of C60 and C70 fullerenes in young planetary nebulae and in reflection nebulae suggests that these molecules are more common in certain astrophysical environments than previously

UNUSUAL DUST EMISSION FROM PLANETARY NEBULAE IN THE MAGELLANIC CLOUDS

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

Spitzer Infrared Spectrograph Observations of Magellanic Cloud Planetary Nebulae: The Nature of Dust in Low-Metallicity Circumstellar Ejecta

We present 5-40 μm spectroscopy of 41 planetary nebulae (PNe) in the Magellanic Clouds, observed with the Infrared Spectrograph on board the Spitzer Space Telescope. The spectra show the presence of

Stability of C 60 and C 70 fullerenes toward corpuscular and ? radiation

The stability of C 60 and C 70 fullerenes in the interstellar medium deposited on dust surface or embedded in meteorites and comets has been simulated with y irradiation and with He+ ion bombardment.

Interstellar Polycyclic Aromatic Hydrocarbon Molecules

Large polycyclic aromatic hydrocarbon (PAH) molecules carry the infrared (IR) emission features that dominate the spectra of most galactic and extragalactic sources. This review surveys the observed