We have computed limb-darkening coefficients for five commonly used near infrared photometric bands, namely R, I, J, H, and K, using the stellar atmosphere...

The possible generation of linear polarization in spectral lines due to depopulation-pumping processes in stellar atmospheres is investigated within the...

Aims: We aim to study the near-infrared linear polarization signal of rapidly rotating ultracool dwarfs with spectral types ranging from M7 through T2 and...

Context. The process that heats the solar chromosphere is a difficult target for observational studies because the assumption of local thermal equilibrium (LTE)...

We present a critical analysis of linearization and preconditioning, the two most used approaches proposed for achieving the required linearity in the iterative...

In this work we studied the two-dimensional ionization structure of the circumnuclear and extranuclear regions in a sample of six low-z ultraluminous infrared...

The main goal of this work is to calculate the contributions of bound-bound transitions of helium to the cosmological recombination spectrum. We show that...

We compute the spectral distortions of the cosmic microwave background (CMB) arising during the epoch of cosmological hydrogen recombination within the standard...

Estimates of the spectral linewidths of low degree (l = 0 and l = 1), 5-min p-modes obtained from Doppler shift observations in 1984 (63 d) and 1986 (63 d) are...