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On the Franck-condon Factors and R-centroids of the Astrophysically Interesting Molecule Cs
| Content Provider | Semantic Scholar |
|---|---|
| Author | Karthikeyan, Balakrishnan Raja, V. Pragadeesh Rajamanickam, N. Bagare, Somashekar Pundalikarao |
| Copyright Year | 2007 |
| Abstract | SUMMARY: In molecular astrophysics, the Franck-Condon (FC) factors andr-centroids are essential for the interpretation of spectral intensities in terms ofemitting astrophysical source conditions. They have been evaluated for the bandsystems a3 Π r - X1 Σ +, d 3 ∆ ni - X1 Σ +, e 3 Σ − - X 1 Σ +, A′ 1 Σ + - X 1 Σ +and d3 ∆ ni - a3 Π r of astrophysical molecule CS. The physical and astrophysicalsignificances of our evaluated FC factors and r-centroids are discussed. The FCfactor values of a - X system have been compared with the values of FC factorsreported by Reddy et al. (2003).Key words. Molecular data - Methods: numerical - Sun: abundances - Stars: abun-dances. 1. INTRODUCTIONCarbon monosulphide (CS) is the firstmolecule containing sulphur that has been detectedin interstellar space (e.g. Jefferts et al. 1971). It hasbeen found in molecular clouds (e.g. Williams et al.1998), planetary nebulae (e.g. Woods et al. 2005),circumstellar envelope of C-type stars (e.g. Nyman1992, Woods et al. 2003), solar photosphere (e.g.Singh et al. 1987, Sinha 1978), other galaxies (e.g.Martin et al. 2005) and its production was also ob-served in the collision of Comet Shoemaker-Levy 9with Jupiter (e.g. Kaiser et al. 1998). With the helpof IUE satellite, the (0,0) band of CS at 2576˚A hasbeen observed in many comets (e.g. Yeomans 1991).The radical CS also has been clearly identified incometary ices (e.g. Crovision et al. 2000).In the field of atmospheric and space physics,CS molecule plays a vital role in the atmosphericreactions. For instance, in the production of atmo-spheric carbonyl sulphide (OCS), CS may be a possi-ble source for the stratospheric sulphate aerosol layerwhich influences the earth’s climate (Deutscher et al.2006).Reliable molecular data on the diatomicmolecules of astrophysical interest are required forthe models of photon-driven physical and chem-ical processes and for the models of the steadystate properties of astronomical objects that ab-sorb or emit photons. In this way, the molecu-lar parameters like dissociation energies, potentialenergy curves, Franck-Condon (FC) factors and r-centroids etc., are essential for estimating the molec-ular abundances and for understanding the physico-chemical conditions of the emitting sources. Par-ticularly, the concept of r-centroid has been much |
| Starting Page | 25 |
| Ending Page | 32 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.2298/saj0775025k |
| Alternate Webpage(s) | http://www.doiserbia.nb.rs/img/doi/1450-698X/2007/1450-698X0775025K.pdf |
| Alternate Webpage(s) | http://saj.matf.bg.ac.rs/175/pdf/025-032.pdf |
| Alternate Webpage(s) | https://doi.org/10.2298/saj0775025k |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
