The extended spectroscopic database for deuterated species of formamide up to 1 THz

Kutsenko, A. S.; Motiyenko, R. A.; Margulès, L.; Guillemin, Jean‐Claude

doi:10.1051/0004-6361/201220375

Cited by 9 publications

(8 citation statements)

References 20 publications

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“…A list of unblended and optically thin lines used in the analysis is presented in Kutsenko et al 2013) and HNCO (Kukolich & Nelson 1971;Hocking et al 1975;Niedenhoff et al 1995;Lapinov et al 2007) come from the Cologne Database for Molecular Spectroscopy (CMDS, Müller et al 2001Müller et al , 2005, while the data for DNCO, HN 13 CO, H 15 NCO and HNC 18 O (Hocking et al 1975) are taken from the Jet Propulsion Laboratory (JPL) database (Pickett et al 1998). It should be noted that there are significant differences for the predicted frequencies of the main isotopologue of NH 2 CHO between CDMS and JPL (>1 MHz).…”

Section: Appendix A: Spectroscopic Datamentioning

confidence: 99%

The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium

Coutens¹,

Jørgensen

Wiel

et al. 2016

A&A

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Formamide (NH 2 CHO) has previously been detected in several star-forming regions and is thought to be a precursor for different prebiotic molecules. Its formation mechanism is still debated, however. Observations of formamide, related species, and their isopotologues may provide useful clues to the chemical pathways leading to their formation. The Protostellar Interferometric Line Survey (PILS) represents an unbiased, high angular resolution and sensitivity spectral survey of the low-mass protostellar binary IRAS 16293-2422 with the Atacama Large Millimeter/submillimeter Array (ALMA). For the first time, we detect the three singly deuterated forms of NH 2 CHO (NH 2 CDO, cis-and trans-NHDCHO), as well as DNCO towards the component B of this binary source. The images reveal that the different isotopologues are all present in the same region. Based on observations of the 13 C isotopologues of formamide and a standard 12 C/ 13 C ratio, the deuterium fractionation is found to be similar for the three different forms with a value of about 2%. The DNCO/HNCO ratio is also comparable to the D/H ratio of formamide (∼1%). These results are in agreement with the hypothesis that NH 2 CHO and HNCO are chemically related through grain-surface formation.

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Section: Appendix A: Spectroscopic Datamentioning

confidence: 99%

The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium

Coutens¹,

Jørgensen

Wiel

et al. 2016

A&A

140

183

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“…This paper is a continuation of a series of studies conducted in PhLAM Lille (France) that are devoted to the investigations of the spectra of different isotopic species of astrophysical molecules (Demyk et al 2007;Margulès et al 2009aMargulès et al ,b, 2010Carvajal et al 2009;Tercero et al 2012;Bouchez et al 2012;Coudert et al 2012Coudert et al , 2013Richard et al 2012Richard et al , 2013Haykal et al 2013;Kutsenko et al 2013;Nguyen et al 2013). In particular, these works led to the first interstellar detection of HCOOCH 2 D (Coudert et al 2013), HCOO 13 CH 3 (Carvajal et al 2009), HCO 18 OCH 3 , HC 18 OOCH 3 (Tercero et al 2012), and CH 2 DOCH 3 (Richard et al 2013).…”

Section: Introductionmentioning

confidence: 89%

Millimeter and submillimeter wave spectra of mono-¹³C-acetaldehydes

Margulès

Motiyenko

Ilyushin

et al. 2015

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Context. The acetaldehyde molecule is ubiquitous in the interstellar medium of our galaxy, and due to its dense and complex spectrum, large dipole moment, and several low-lying torsional states, acetaldehyde is considered to be a "weed" molecule for radio astronomy observations. Mono-13 C acetaldehydes 13 CH 3 CHO and CH 3 13 CHO are likely to be identified in astronomical surveys, such as those available with the very sensitive ALMA telescope. Laboratory measurements and analysis of the millimeter and submillimeter-wave spectra are the prerequisites for the successful radioastronomical search for the new interstellar molecular species, as well as for new isotopologs of already detected interstellar molecules. Aims. In this context, to provide reliable predictions of 13 CH 3 CHO and CH 3 13 CHO spectra in millimeter and submillimeter wave ranges, we study rotational spectra of these species in the frequency range from 50 to 945 GHz. Methods. The spectra of mono-13 C acetaldehydes were recorded using the spectrometer based on Schottky-diode frequencymultiplication chains in the Lille laboratory. The rotational spectra of 13 CH 3 CHO and CH 3 13 CHO molecules were analyzed using the Rho axis method. Results. In the recorded spectra we have assigned 6884 for the 13 CH 3 CHO species and 6458 for CH 3 13 CHO species new rotational transitions belonging to the ground, first, and second excited torsional states. These measurements were fitted together with previously published data to the Hamiltonian models that use 91 and 87 parameters to achieve overall weighted rms deviations 0.88 for the 13 CH 3 CHO species and 0.95 for CH 3 13 CHO. On the basis of the new spectroscopic results, predictions of transition frequencies in the frequency range up to 1 THz with J ≤ 60 and K a ≤ 20 are presented for both isotopologs.

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“…This paper is a part of a series of studies conducted in PhLAM Lille (France) that are devoted to the investigations of the spectra of different isotopic species of astrophysical molecules (Demyk et al 2007;Margulès et al 2009aMargulès et al ,b, 2015Carvajal et al 2009;Tercero et al 2012;Bouchez et al 2012;Coudert et al 2012;Richard et al 2012Richard et al , 2013Haykal et al 2013;Kutsenko et al 2013;Nguyen et al 2013). In particular these works led to the first interstellar detection of HCOOCH 2 D (Coudert et al 2013), HCOO 13 CH 3 (Carvajal et al 2009), HCO 18 OCH 3 , HC 18 OOCH 3 (Tercero et al 2012), CH 2 DOCH 3 (Richard et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Millimeter and submillimeter wave spectra of¹³C methylamine

Motiyenko

Margulès

Ilyushin

et al. 2016

A&A

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Context. Methylamine (CH 3 NH 2 ) is a light molecule of astrophysical interest, which has an intensive rotational spectrum that extends in the submillimeter wave range and far beyond, even at temperatures characteristic for the interstellar medium. It is likely for 13 C isotopologue of methylamine to be identified in astronomical surveys, but there is no information available for the 13 CH 3 NH 2 millimeter and submillimeter wave spectra. Aims. In this context, to provide reliable predictions of 13 CH 3 NH 2 spectrum in millimeter and submillimeter wave ranges, we have studied rotational spectra of the 13 C methylamine isotopologue in the frequency range from 48 to 945 GHz. Methods. The spectrum of 13 C methylamine was recorded using conventional absorption spectrometers. The analysis of the rotational spectrum of 13 C methylamine in the ground vibrational state was performed on the basis of the group-theoretical high-barrier tunneling Hamiltonian that was developed for methylamine. The available multiple observations of the parent methylamine species toward Sgr B2(N) at 1, 2, and 3 mm using the Submillimeter Telescope and the 12 m antenna of the Arizona Radio Observatory were used to make a search for interstellar 13 CH 3 NH 2 .Results. In the recorded spectra, we have assigned 2721 rotational transitions that belong to the ground vibrational state of the 13 CH 3 NH 2 . These measurements were fitted to the Hamiltonian model that uses 75 parameters to achieve an overall weighted rms deviation of 0.73. On the basis of these spectroscopic results, predictions of transition frequencies in the frequency range up to 950 GHz with J ≤ 50 and K a ≤ 20 are presented. The search for interstellar 13 C methylamine in available observational data was not successful and therefore only an upper limit of 6.5 × 10 14 cm −2 can be derived for the column density of 13 CH 3 NH 2 toward Sgr B2(N), assuming the same source size, temperature, linewidth, and systemic velocity as for parent methylamine isotopic species.

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The extended spectroscopic database for deuterated species of formamide up to 1 THz

Cited by 9 publications

References 20 publications

The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium

The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium

Millimeter and submillimeter wave spectra of mono-¹³C-acetaldehydes

Millimeter and submillimeter wave spectra of¹³C methylamine

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The extended spectroscopic database for deuterated species of formamide up to 1 THz

Cited by 9 publications

References 20 publications

The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium

The ALMA-PILS survey: First detections of deuterated formamide and deuterated isocyanic acid in the interstellar medium

Millimeter and submillimeter wave spectra of mono-13C-acetaldehydes

Millimeter and submillimeter wave spectra of13C methylamine

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Millimeter and submillimeter wave spectra of mono-¹³C-acetaldehydes

Millimeter and submillimeter wave spectra of¹³C methylamine