| DOI | Trouver le DOI : https://doi.org/10.1088/2041-8205/729/2/L20 |
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| Auteur | Rechercher : Maier, J. P.; Rechercher : Chakrabarty, S.; Rechercher : Mazzotti, F. J.; Rechercher : Rice, C. A.; Rechercher : Dietsche, R.; Rechercher : Walker, G. A. H.; Rechercher : Bohlender, D. A.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
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| Format | Texte, Article |
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| Sujet | ISM: general; ISM: lines and bands; ISM: molecules; methods: laboratory; techniques: spectroscopic |
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| Résumé | Krelowski et al. have reported a weak, diffuse interstellar band (DIB) at 5069 angstrom which appears to match in both mid-wavelength and width the A(2)Pi(u)-X(2)Pi(g) gas-phase origin absorption band of HC(4)H(+). Here, we present laboratory rotational profiles at low temperatures which are then compared with the 5069 angstrom DIB using similar to 0.1 and 0.3 angstrom line widths based on a realistic line-of-sight interstellar velocity dispersion. Neither the band shape nor the wavelength of the maximum absorption match, which makes the association of the 5069 angstrom DIB with HC(4)H(+) unlikely. The magnetic dipole transition X(2)Pi(g)Omega = 1/2 -> X(2)Pi(g)Omega = 3/2 within the ground electronic state which competes with collisional excitation is also considered. In addition, we present the laboratory gas-phase spectrum of the A(2)Pi(u)-X(2)Pi(g) transition of HC(4)H(+) measured at 25 K in an ion trap and identify further absorption bands at shorter wavelengths for comparison with future DIB data. |
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| Date de publication | 2011-02-14 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 19734693 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 75208aec-a601-483b-8550-720b37c4e940 |
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| Enregistrement créé | 2012-03-28 |
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| Enregistrement modifié | 2020-04-21 |
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