On the Effective Temperature of Sunspot Umbrae using Beryllium Hydride Isotopomer Lines

A search for fourteen bands of the visibleand infrared systems of the beryllium hydride isotopomers, in addition to the previously identified bands A - X(0, 0; 1, 1; 2, 2) for BeH, A - X(0, 0; 1, 1; 2, 2) for BeD and A - X(0, 0; 1, 1; 2, 2) for BeT molecules was conducted. The equivalent widths were measured for the well isolated identified lines of the strongest band and the effective temperatures were estimated for the systems for which the presence of hints is confirmed

Spectroscopic Analysis of Gas Phase Astrophysical Molecule: Beryllium Monofluride

International audienceThe beryllium monofluride (BeF) is astrophysically significant molecule.The radiative transition parameters such as Franck-Condon (FC) factor, r-centroids, electronic transition moment, Einstein coefficient, band oscillator strength, radiative life time and effective vibrational temperature have been computed for 2 2 r A X     system of BeF 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 temperature of this system of BeF molecule was found to be nearly 5630 K. Hence, the radiative transition parameters as well as effective vibrational temperature help us to ascertain the presence of BeF molecule in the interstellar medium, S-stars and sunspots. Introduction. Fluoride based beryllium are significant molecules in the field of astrophysics, astrochemistry and space science. The intensity distribution of the molecular band system of electronic states is controlled by the Franck-Condon (FC) factor. Franck-Condon (FC) factor are essential parameter for every molecular band system, this factor are used to calculation of the relative band intensities. The knowledge of r-centroids is useful in the discussion of the variation of the electronic transition moment with the internuclear separation and the band strengths. The evaluation of accurate FC factor and r-centroids of diatomic molecule is necessary for understanding the physical-chemical condition of the astrophysical and allied emitting source. Accurate values of FC facto

On the effective temperature of sunspot umbrae using beryllium hydride isotopomer lines

A search for fourteen bands of the visible and infrared systems of the beryllium hydride isotopomers, in addition to the previously identified bands A - X(0, 0; 1, 1; 2, 2) for BeH, A - X(0, 0; 1, 1; 2, 2) for BeD and A - X(0, 0; 1, 1; 2, 2) for BeT molecules was conducted. The equivalent widths were measured for the well isolated identified lines of the strongest band and the effective temperatures were estimated for the systems for which the presence of hints is confirmed