Abstract
The integrated intensities of a few bands in the vibrational structure of the astrophysically significant A1 Σ+−X1 Σ+ and A′ 1 Π−X1 Σ+ systems of barium monoxide (BaO) have been measured experimentally using band spectra. The radiative transition parameters such as Franck-Condon (FC) factor, r-centroid, electronic transition moment, Einstein coefficient, band oscillator strength, radiative life time and effective vibrational temperature have been computed for A1 Σ+−X1 Σ+ and A′ 1 Π−X1 Σ+ systems of BaO molecule by the more reliable numerical integration procedure for the experimentally known vibrational levels using Rydberg-Klein-Rees (RKR) potential energy curves. The effective vibrational temperatures of these band systems of BaO molecule are found to be nearly 3100 °K. Hence, the radiative transition parameters help us to ascertain the presence of BaO molecule in the interstellar medium and S-stars.
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Acknowledgements
The authors express deep gratitude to their mentors Dr. N. Rajamanickam, Former Head, Physics Research Centre, VHNSN College, Virudhunagar and Prof. S.P. Bagare, Indian Institute of Astrophysics, Bangalore. We thank Dr. S. Vasigaran, Research Centre in English, VHNSN College, Virudhunagar, for his help with language corrections.
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Sriramachandran, P., Shanmugavel, R. Intensity distribution in the A1 Σ+−X1 Σ+ and A′ 1 Π−X1 Σ+ systems of barium monoxide. Astrophys Space Sci 354, 251–257 (2014). https://doi.org/10.1007/s10509-014-2127-0
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DOI: https://doi.org/10.1007/s10509-014-2127-0