Biomedical subjects

P Sonnentrucker

Publications and source records attributed to P Sonnentrucker.

2 recordsLinked to original sources

PubMed1999

Evidence for large organic molecules in the diffuse medium using optical high resolution spectroscopy.

The Diffuse Interstellar Bands (DIBs) are absorption lines observed in the line of sight toward reddened OB stars. Their ubiquitous detection in space indicates chemically stable and abundant carriers. High resolution spectroscopy led to the detection of substructures in the line profiles of a few DIBs, indicating a gas phase molecular origin of the carriers. Line profile studies are useful tools to derive information on the band carriers nature. In this paper we compared the velocity structure of the lambda 6613 angstroms DIB line profile to the NaD1 and CaII profiles toward 6 targets of the Perseus OB2 association.

Astronomy↗

PubMed1999

New estimates of ionization potentials of four DIB molecular carriers.

We present a study of the behaviour and ionization properties of four Diffuse Interstellar Bands (DIBs) at lambda lambda 5780, 5797, 6379 and 6613 angstroms. In the lambda lambda 5797, 6379 and 6613 angstrom DIBs, substructures have recently been detected, indicating large gaseous molecular carriers. Studying DIBs in regions with different physical properties in terms of UV flux and density enables us to monitor the behaviour of the carriers and hence to constrain their nature. As a follow-up of Sonnentrucker et al. (1997), we add new lines of sight and generalize the results for lines of sight with 2 or 3 clouds. This refines the Ionization Potential estimates which are between 10 and 13 eV, hence reminiscent of PAH or fullerene cations for those DIBs.

Astronomical Phenomena↗