Temperature of the disc integrated sunlight from the intensity measurements of rotational lines of the bands of A-X system of CH molecule

294-300The temperature of the disc integrated sunlight has been calculated by measuring the intensities of 113 rotational lines belonging to the R and P branches of the 0-0, 1-1 and 2-2 bands of the A2Δ5/2-X2Π3/2 transition and 0-0 and 1-1 bands of A2Δ3/2-X2Π1/2 transition of a CH molecule. The Fourier transform spectroscopic data has been taken from solar flux Atlas for the visible and near infra-red prepared by Wallace (NSO Technical Report #11-001 2011). The temperature comes out as 3300±121 K, less than the surface temperature of the photosphere of the sun as expected

Measurement of rotational temperature of AlO molecule from Fourier transform spectrum of the 0–0 band of B

The astrophysical importance of AlO molecule and its astronomical significance is well known. The existence of AlO molecule in the atmospheres of M type of stars is reported. The identification of B–X system in spectrum of some normal Mira giants and Mira variables is reported in literature. In the present work, the high resolution spectrum of the B2Σ+–X2Σ+ system of AlO was recorded on a Fourier Transform Spectrometer. By measuring the intensities of the well-resolved rotational lines of R1 and R2 branches of the (0–0) band measured the rotational temperature is calculated which is 1967 ± 75 K