Elektrisches Dipolmoment und Mikrowellenrotationsspektrum des GeO und GeS

Hoeft, J.; Lovas, F. J.; Tiemann, E.; Tischer, R. G.; Törring, T.

doi:10.1515/zna-1969-0808

Cited by 25 publications

(28 citation statements)

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“…a Same data are also adopted for isotopes and deuterated species, unless stated in the datafile. Hoeft et al (1969); (7) Botschwina et al (1993); (8) Botschwina (1989); (9) Defrees et al (1982); (10) Muenter (1968); (11) DeLeon & Muenter (1985); (12) Ebenstein & Muenter (1984); (13) Blackman et al (1976); (14) Hocking et al (1975); (15) Gadhi et al (1995); (16) Fabricant et al (1977); (17) ; (18) Botschwina & Sebald (1985); (19) Sastry et al (1981); (20) Cohen & Poynter (1974); (21) From JPL based on Camy-Peyret et al (1985); (22) Suenram et al (1989); (23) De Leeuw & Dymanus (1971); (24) Peterson et al (1984); (25) Botschwina et al (1984).…”

Section: Dipole Momentsmentioning

confidence: 99%

An atomic and molecular database for analysis of submillimetre line observations

Schöier

Tak

Dishoeck

et al. 2005

A&A

1,434

1,366

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Abstract. Atomic and molecular data for the transitions of a number of astrophysically interesting species are summarized, including energy levels, statistical weights, Einstein A-coefficients and collisional rate coefficients. Available collisional data from quantum chemical calculations and experiments are extrapolated to higher energies (up to E/k ∼ 1000 K). These data, which are made publically available through the WWW at http://www.strw.leidenuniv.nl/∼moldata, are essential input for non-LTE line radiative transfer programs. An online version of a computer program for performing statistical equilibrium calculations is also made available as part of the database. Comparisons of calculated emission lines using different sets of collisional rate coefficients are presented. This database should form an important tool in analyzing observations from current and future (sub)millimetre and infrared telescopes.

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Section: Dipole Momentsmentioning

confidence: 99%

An atomic and molecular database for analysis of submillimetre line observations

Schöier

Tak

Dishoeck

et al. 2005

A&A

1,434

1,366

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“…Spectroscopic constants are from Sanz et al (2003). The dipole moment (μ = 1.730D) was taken from Hoeft et al (1969). Line frequencies and observational line parameters are given in Table 3.…”

Section: Sismentioning

confidence: 99%

A line-confusion limited millimeter survey of Orion KL

Tercero

Vincent

Cernicharo

et al. 2011

A&A

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Aims. We present a study of the silicon-bearing species detected in a line-confusion limited survey towards Orion KL performed with the IRAM 30-m telescope. The analysis of the line survey is organized by families of molecules. Our aim is to derive physical and chemical conditions for each family taking all observed lines into account from all isotopologs of each species. The large number of transitions in different vibrationally excited states covered by our data, which range from 80 to 280 GHz, let us provide reliable source-average column densities (hence, isotopolog abundances and vibrational temperatures) for the detected molecules. In addition, we provide a wide study of the physical properties of the source based on the different spectral components found in the emission lines. Methods. We modeled the lines of the detected molecules using a radiative transfer code, which permit us to choose between large velocity gradient (LVG) and local thermodynamic equilibrium (LTE) approximations depending on the physical conditions of the gas. We used appropriate collisional rates for the LVG calculations. To qualitatively investigate the origin of the SiS and SiO emissions in Orion KL we ran a grid of chemical models.Results. For the v = 1 state of SiO, we detected the J = 2−1 line and, for the first time in this source, emission in the J = 4−3 transition, both of them showing a strong masering effect. For SiO v = 0, we detected 28 SiO, 29 SiO, and 30 SiO; in addition, we have mapped the J = 5−4 SiO line. For SiS, we have detected the main species, 29 SiS, and SiS v = 1. Unlikely other species detected in Orion KL (IRc2), the emission peak of SiS appears at a velocity of 15.5 km s −1 . A study of the 5−4 SiO line around IRc2 shows this feature as an extended component that probably arises from the interaction of the outflow with the ambient cloud. We derive an SiO/SiS column density ratio of 13 in the plateau component, four times lower than the cosmic O/S ratio 48. In addition, we provide upper limits to the column density of several non-detected silicon-bearing species. The results of our chemical models show that while it is possible to reproduce SiO in the gas phase (as well as on the grains), SiS is a product of surface reactions, most likely involving direct reactions of sulfur with silicon.

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“…A quantitative analysis of the rotation-vibrational spectra of diatomic molecules consists of the evaluation of parameters of the radial wave equation (17) [2] in which…”

Section: Treatment Of Spectral Datamentioning

confidence: 99%

“…The highly resolved spectra of nine isotopic variants of GeS X 1 ⌺ ϩ consist of 111 pure rotational transitions in vibrational states from v ϭ 0 up to v ϭ 5 (1)(2)(3)(4), and 616 vibration-rotational transitions in vibrational progressions with ⌬v ϭ 1 up to v ϭ 7 (5). The microwave spectra were measured with a precision of 9 -50 KHz, whereas infrared ones were 0.0006 cm Ϫ1 .…”

Section: Introductionmentioning

confidence: 99%

Application of Deformational Self-Consistent Procedure and New Potential Expansion to Effective Reduction of Wavenumbers of Rotational and Vibration–Rotational Transitions of GeSX1Σ+

Molski

1999

Journal of Molecular Spectroscopy

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Elektrisches Dipolmoment und Mikrowellenrotationsspektrum des GeO und GeS

Cited by 25 publications

References 0 publications

An atomic and molecular database for analysis of submillimetre line observations

An atomic and molecular database for analysis of submillimetre line observations

A line-confusion limited millimeter survey of Orion KL

Application of Deformational Self-Consistent Procedure and New Potential Expansion to Effective Reduction of Wavenumbers of Rotational and Vibration–Rotational Transitions of GeSX1Σ+

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