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http://hdl.handle.net/20.500.12386/30777
Titolo: | Rotational and Rotational-Vibrational Raman Spectroscopy of Air to Characterize Astronomical Spectrographs | Autori: | Vogt, Frédéric P. A. Kerber, Florian Mehner, Andrea Yu, Shanshan Pfrommer, Thomas Lo Curto, Gaspare Figueira, Pedro Parraguez, Diego Pepe, Francesco A. Mégevand, Denis RIVA, Marco DI MARCANTONIO, Paolo Lovis, Christophe Amate, Manuel MOLARO, Paolo Cabral, Alexandre Osorio, Maria Rosa Zapatero |
Data pubblicazione: | 2019 | Rivista: | PHYSICAL REVIEW LETTERS | Numero: | 123 | Fascicolo: | 6 | Da pagina:: | 061101 | Abstract: | Raman scattering enables unforeseen uses for the laser guide-star system of the Very Large Telescope. Here, we present the observation of one up-link sodium laser beam acquired with the ESPRESSO spectrograph at a resolution λ /Δ λ ˜140 000 . In 900 s on source, we detect the pure rotational Raman lines of <SUP>16</SUP>O<SUB>2</SUB>, <SUP>14</SUP>N<SUB>2</SUB>, and <SUP>14</SUP>N <SUP>15</SUP>N (tentatively) up to rotational quantum numbers J of 27, 24, and 9, respectively. We detect the <SUP>16</SUP>O<SUB>2</SUB> fine-structure lines induced by the interaction of the electronic spin S and end-over-end rotational angular momentum N in the electronic ground state of this molecule up to N =9 . The same spectrum also reveals the ν<SUB>1 ←0</SUB> rotational-vibrational Q-branch for <SUP>16</SUP>O<SUB>2</SUB> and <SUP>14</SUP>N<SUB>2</SUB> 14. These observations demonstrate the potential of using laser guide-star systems as accurate calibration sources for characterizing new astronomical spectrographs. | URI: | http://hdl.handle.net/20.500.12386/30777 | URL: | http://arxiv.org/abs/1907.05897v1 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.061101 |
ISSN: | 0031-9007 | DOI: | 10.1103/PhysRevLett.123.061101 | Bibcode ADS: | 2019PhRvL.123f1101V | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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