Broad-band high-resolution rotational spectroscopy for laboratory astrophysics

被引：15

作者：

Cernicharo, J. ^{[1
]}

Gallego, J. D. ^{[2
]}

Lopez-Perez, J. A. ^{[2
]}

Tercero, F. ^{[2
]}

Tanarro, I ^{[3
]}

Beltran, F. ^{[2
]}

de Vicente, P. ^{[2
]}

Lauwaet, K. ^{[4
,5
]}

Aleman, B. ^{[4
,6
]}

Moreno, E. ^{[1
]}

Herrero, V. J. ^{[3
]}

Domenech, J. L. ^{[3
]}

Ramirez, S., I ^{[1
,7
]}

Bermudez, C. ^{[1
]}

Pelaez, R. J. ^{[3
]}

Patino-Esteban, M. ^{[2
]}

Lopez-Fernandez, I ^{[2
]}

Garcia-Alvaro, S. ^{[2
]}

Garcia-Carreno, P. ^{[2
]}

Cabezas, C. ^{[1
]}

Malo, I ^{[2
]}

Amils, R. ^{[2
]}

Sobrado, J. ^{[8
]}

Diez-Gonzalez, C. ^{[2
]}

Hernandez, J. M. ^{[2
]}

Tercero, B. ^{[2
]}

Santoro, G. ^{[4
]}

Martinez, L. ^{[4
]}

Castellanos, M. ^{[1
]}

Vaquero Jimenez, B. ^{[2
]}

Pardo, J. R. ^{[1
]}

Barbas, L. ^{[2
]}

Lopez-Fernandez, J. A. ^{[2
]}

Aja, B. ^{[9
]}

Leuther, A. ^{[10
]}

Martin-Gago, J. A. ^{[4
]}

机构：

[1] CSIC, IFF, Grp Mol Astrophys, C Serrano 123, Madrid 28006, Spain

[2] Observ Yebes IGN, Ctr Desarrollos Tecnol, Guadalajara 19141, Spain

[3] CSIC, IEM, Mol Phys Dept, C Serrano 123, Madrid 28006, Spain

[4] CSIC, ICMM, Mat Sci Factory, Struct Nanoscop Syst Grp,ESISNA, C Sor Juana Ines de la Cruz 3, Madrid 28049, Spain

[5] IMDEA Nanociencia, Ciudad Univ Cantoblanco, Madrid 28049, Spain

[6] IMDEA Mat, C Eric Kandel 2, Madrid 28906, Spain

[7] UAEM, Ctr Invest Quim, Av Univ 1001, Cuernavaca 62209, Morelos, Mexico

[8] Ctr Astrobiol CSIC INTA, Crta Torrejon de Ardoz Ajalvir Km 4, Torrejon De Ardoz 28850, Spain

[9] Univ Cantabria, Dept Commun Engn, E-39005 Santander, Spain

[10] Fraunhofer Inst Appl Solid State Phys, Tullastresse 72, D-79108 Freiburg, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2019年 / 626卷

基金：

欧洲研究理事会;

关键词：

molecular data; molecular processes; line: identification; plasmas; methods: laboratory: molecular; MOLECULAR-SPECTROSCOPY; SUBMILLIMETER; CHEMISTRY; DISCOVERY; SATELLITE; SPECTRA; PEPTIDE; MODEL;

D O I：

10.1051/0004-6361/201935197

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new experimental set-up devoted to the study of gas phase molecules and processes using broad-band high spectral resolution rotational spectroscopy. A reactor chamber is equipped with radio receivers similar to those used by radio astronomers to search for molecular emission in space. The whole range of the Q (31.5-50 GHz) and W bands (72-116.5 GHz) is available for rotational spectroscopy observations. The receivers are equipped with 16 x 2.5 GHz fast Fourier transform spectrometers with a spectral resolution of 38.14 kHz allowing the simultaneous observation of the complete Q band and one-third of the W band. The whole W band can be observed in three settings in which the Q band is always observed. Species such as CH3CN, OCS, and SO2 are detected, together with many of their isotopologues and vibrationally excited states, in very short observing times. The system permits automatic overnight observations, and integration times as long as 2.4 x 10(5) s have been reached. The chamber is equipped with a radiofrequency source to produce cold plasmas, and with four ultraviolet lamps to study photochemical processes. Plasmas of CH4, N-2, CH3CN, NH3, O-2, and H-2, among other species, have been generated and the molecular products easily identified by the rotational spectrum, and via mass spectrometry and optical spectroscopy. Finally, the rotational spectrum of the lowest energy conformer of CH3CH2NHCHO (N-ethylformamide), a molecule previously characterized in microwave rotational spectroscopy, has been measured up to 116.5 GHz, allowing the accurate determination of its rotational and distortion constants and its search in space.

引用

页数：29

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