A 8.8-50 GHz Complete Spectral Line Survey toward TMC-1: I. Survey Data.

By N. Kaifu, M. Ohishi, K. Kawaguchi, S. Saito, S. Yamamoto, T. Miyaji, K. Miyazawa, S. Ishikawa, Chiaki Noumaru, S. Harasawa and 2 more. 2004

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We completed the first spectral line survey toward a cold, dark cloud TMC-1 (cyanopolyyne peak) in a frequency range between 8.8 and 50.0 GHz by the 45-m radio telescope of Nobeyama Radio Observatory. We detected 414 lines of 38 molecular species including 11 new molecules, such as C6H, CCO, C3O, CCS, C3S, HNCCC, HCCNC, HC3NH + , HCCCHO, CH2CN, and cyclic C3H (c-C3H), which were previously reported; only one significant line, U49536, remains unidentified. 177 out of 414 lines are reported for the first time. Some half of the detected molecules are linear carbon-chain species and their derivatives. We also discovered three new rarer isotopomers: CC34S, C3S, and HDCS. Spectral charts are presented together with the observed line parameters of all detected lines. Improved molecular constants of several carbon-chain molecules obtained during the course of identification are also presented.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Spectroscopy

View Paper: https://www.semanticscholar.org/paper/8499873b680722dd56cb12b90c4b584401d8f861

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Citations in the corpus

2018 Census of Interstellar, Circumstellar, Extragalactic, Protoplanetary Disk, and Exoplanetary Molecules (2018, methodology): “Observations of a single rotational transition (N = 1–0) of CH2CN in TMC-1 from the Kaifu et al. (2004) survey in black, with the measured laboratory transitions overlaid in red.”
A 2 Millimeter Spectral Line Survey of the Starburst Galaxy NGC 253 (2006, background): “The initial detection of most of these 129 molecules has been the result of unbiased frequency scans toward specific Galactic sources, such as massive star-forming regions (e.g., Sgr B2(M), Cummins et al. 1986; OriMC-1, Lee et al. 2001), cold molecular clouds (e.g., TMC-1, Kaifu et al. 2004), and ev”
THE ORIGIN OF COMPLEX ORGANIC MOLECULES IN PRESTELLAR CORES (2014, background): “So far, very few detections of the C3O have been reported and only one in a cold dark cloud core, TMC-1, unusually carbon-rich (Matthews et al. 1984; Kaifu et al. 2004).”
Discovery of Interstellar Propylene (CH2CHCH3): Missing Links in Interstellar Gas-Phase Chemistry (2007, methodology): “We have checked the U-lines in previous line surveys of Orion and Sgr B2 at different frequency bands (Sutton et al. 1985; Cummins et al. 1986; Turner 1989; Schilke et al. 1997; Nummelin et al. 1998; Friedel et al. 2004), and also the unidentified lines reported by Kaifu et al. (2004) towards TMC-1.”
Our astrochemical heritage (2012, background): “ (CH 3C 5N, [404]), methyltriacetylene (CH 3C 6H, [369]), propylene (CH 2CHCH 3, [281]), methyldiacetylene (CH 3C 4H), cyanopolyynes (HC 2n+1N, n=0,1,...,5) and C 2n+1N radicals ([447]; [206]; [328]; [236]) and the negative ions C 6H , C 8H ([291]; [72]). Complex organics have also been found in two”