Publications (20)
Estimated IR and phosphorescence emission fluxes for specific Polycyclic Aromatic Hydrocarbons in the Red Rectangle
G. Mulas, G. Malloci, C. Joblin +1
Following the tentative identification of the blue luminescence in the Red Rectangle by Vijh et al. (2005), we compute absolute fluxes for the vibrational IR emission and phosphore…
Redshifted Diffuse Interstellar Bands in Orion OB1 association
J. KreÅowski, G. A. Galazutdinov, G. Mulas +2
The wavelength displacement of the Diffuse Interstellar Bands at 4502, 5705, 5780, 6284, and 7224 Ã with respect to the well known, narrow atomic/molecular interstellar lines (of C…
Laboratory studies of polycyclic aromatic hydrocarbons: the search for interstellar candidates
C. Joblin, O. Berne, A. Simon +1
Polycyclic Aromatic Hydrocarbons (PAHs) are considered as a major constituent of interstellar dust. They have been proposed as the carriers of the Aromatic Infrared Bands (AIBs) ob…
Mass motions and chromospheres of RGB stars in the globular cluster NGC 2808
C. Cacciari, A. Bragaglia, E. Rossetti +6
We present the results of the first observations, taken with FLAMES during Science Verification, of red giant branch (RGB) stars in the globular cluster NGC 2808. A total of 137 st…
Search for corannulene (C20H10) in the Red Rectangle
P. Pilleri, D. Herberth, T. F. Giesen +10
Polycyclic Aromatic Hydrocarbons (PAHs) are widely accepted as the carriers of the Aromatic Infrared Bands (AIBs), but an unambiguous identification of any specific interstellar PA…
Field Camera Unit for WSO-UV: Phase A Study Report
I. Pagano, F. Bacciotti, L. Bedin +33
World Space Observatory UltraViolet (WSO-UV) is a multipurpose space observatory, made by a 170 cm aperture telescope, capable of UV high-resolution spectroscopy, long slit low-res…
Dehydrogenated polycyclic aromatic hydrocarbons and UV bump
G. Malloci, G. Mulas, C. Cecchi-Pestellini +1
Recent calculations have shown that the UV bump at about 217.5 nm in the extinction curve can be explained by a complex mixture of PAHs in several charge states. Other studies prop…
The role of the charge state of PAHs in ultraviolet extinction
C. Cecchi-Pestellini, G. Malloci, G. Mulas +2
Aims: We explore the relation between charge state of polycyclic aromatic hydrocarbons (PAHs) and extinction curve morphology. Methods: We fit extinction curves with a dust model i…
Electronic and optical properties of families of polycyclic aromatic hydrocarbons: a systematic (time-dependent) density functional theory study
G. Malloci, G. Cappellini, G. Mulas +1
Homologous classes of Polycyclic Aromatic Hydrocarbons (PAHs) in their crystalline state are among the most promising materials for organic opto-electronics. Following previous wor…
Nano-particle Transition Matrix code implementation
G. La Mura, G. Mulas, G. Aresu +4
Electromagnetic scattering and absorption by material particles is a fundamental physical problem with a broad range of applications, going from laboratory experiments, biology and…
Detection of Buckminsterfullerene emission in the diffuse interstellar medium
O. Berné, N. L. J. Cox, G. Mulas +1
Emission of fullerenes in their infrared vibrational bands has been detected in space near hot stars. The proposed attribution of the diffuse interstellar bands at 9577 and 9632 Ã…
A general model for the identification of specific PAHs in the far-IR
G. Mulas, G. Malloci, C. Joblin +1
Context. In the framework of the interstellar PAH hypothesis, far-IR skeletal bands are expected to be a fingerprint of single species in this class. Aims. A detailed model of the…
Visible photodissociation spectroscopy of PAH cations and derivatives in the PIRENEA experiment
F. Useli-Bacchitta, A. Bonnamy, G. Mulas +3
The electronic spectra of gas-phase cationic polycyclic aromatic hydrocarbons (PAHs), trapped in the Fourier Transform Ion Cyclotron Resonance cell of the PIRENEA experiment, have…
Interstellar dust as a dynamic environment
G. La Mura, G. Mulas, M. A. Iatì +3
In spite of accounting for only a small fraction of the mass of the Interstellar Medium (ISM), dust plays a primary role in many physical and chemical processes in the Universe. It…
On-line database of the spectral properties of polycyclic aromatic hydrocarbons
G. Malloci, C. Joblin, G. Mulas
We present an on-line database of computed molecular properties for a large sample of polycyclic aromatic hydrocarbons (PAHs) in four charge states: -1, 0, +1, and +2. At present o…
Diagnostics for specific PAHs in the far-IR: searching neutral naphthalene and anthracene in the Red Rectangle
G. Mulas, G. Malloci, C. Joblin +1
Context. In the framework of the interstellar polycyclic aromatic hydrocarbons (PAHs) hypothesis, far-IR skeletal bands are expected to be a fingerprint of single species in this c…
Polycyclic aromatic hydrocarbons with SPICA
O. Berne, C. Joblin, G. Mulas +2
Thanks to high sensitivity and angular resolution and broad spectral coverage, SPICA will offer a unique opportunity to better characterize the nature of polycyclic aromatic hydroc…
30 years of cosmic fullerenes
O. Berne, J. Montillaud, G. Mulas +1
In 1985, "During experiments aimed at understanding the mechanisms by which long-chain carbon molecules are formed in interstellar space and circumstellar shells", Harry Kroto and…
Theoretical evaluation of PAH dications properties
G. Malloci, C. Joblin, G. Mulas
Aims. We present a systematic theoretical study on 40 polycyclic aromatic hydrocarbons dications (PAHs++) containing up to 66 carbon atoms. Methods. We performed our calculations u…
Time-dependent density functional study of the electronic spectra of oligoacenes in the charge states -1, 0, +1, and +2
G. Malloci, G. Mulas, G. Cappellini +1
We present a systematic theoretical study of the five smallest oligoacenes (naphthalene, anthracene, tetracene, pentacene, and hexacene) in their anionic,neutral, cationic, and dic…