Precise THz Measurements of HCO+, N2H+ and CF+ for Astrophysical Observations

Anno: 2012

Autori: Cazzoli G., Cludi L., Buffa G., Puzzarini C.

Affiliazione autori: Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy; Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy; Univ Pisa, INO CNR, I-56127 Pisa, Italy.

Abstract: Ground-state rotational spectra of HCO+, N2H+, and CF+ (both C-12- and C-13- containing isotopologues) have been recorded in the 1.0-1.6 THz frequency range. Present measurements allowed us to improve the spectroscopic parameters, which in turn enabled the prediction of rotational transitions up to 2.0-2.5 THz with good accuracy. We therefore consider the present results to be of great value in view of the extended spectral coverage made available by the Herschel Space Observatory, Stratospheric Observatory for Infrared Astronomy, and the Atacama Large Millimeter Array. Furthermore, we re- investigated the ground-state rotational spectrum of N2H+ in the 93-750 GHz frequency range, thus addressing the open issue of the frequency of the J = 1 <- 0 transition as well as resolving the hyperfine structure of the J = 1 <- J transitions with J = 1, 2, and 3 for the first time. Giornale/Rivista: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

Volume: 203 (1)      Da Pagina: 11-1  A: 11-9

Maggiori informazioni: This work has been supported in Bologna by PRIN 2009 funds and by the University of Bologna (RFO funds).
Parole chiavi: ISM: molecules; line: identification; methods: data analysis; methods: laboratory; molecular data; molecular processes; radio lines: ISM
DOI: 10.1088/0067-0049/203/1/11

Citazioni: 44
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-04
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