19 citations · 19 across the 3 of their papers we have counts for
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Mixed chemistry phenomenon during late stages of stellar evolution
R. Szczerba, M. R. Schmidt, M. Pulecka
We discuss phenomenon of simultaneous presence of O- and C-based material in surroundings of evolutionary advanced stars. We concentrate on silicate carbon stars and present observ…
Search for radiative pumping lines of OH masers: I. The 34.6um absorption line towards 1612 MHz OH maser sources
J. H. He, R. Szczerba, P. S. Chen +1
The 1612 MHz hydroxyl maser in circumstellar envelopes has long been thought to be pumped by 34.6um photons. Only recently, the Infrared Space Observatory has made possible spectro…
Radiative pumping of 1612 MHz OH masers: OH/IR sources with IRAS LRS spectra and 34.6 micrometer absorption feature
R. Szczerba, J. H. He, P. S. Chen
The population inversion which leads to the 1612 MHz OH maser emission has long been thought to be radiatively pumped. Since OH rotational lines involved in this pumping scheme lie…
The peculiar post-AGB supergiant IRAS 04296+3429: optical spectroscopy and its spectral energy distribution
V. G. Klochkova, R. Szczerba, V. E. Panchuk +1
The optical spectrum of the infrared source IRAS 04296+3429 (optical counterpart-G0 Ia star, V=14.2) was obtained with the echelle spectrometer PFES at the prime focus of the 6 m t…
Benchmark problems for wavelength dependent continuum radiative transfer
Z. Ivezic, M. Groenewegen, A. Menshchikov +1
When verifying a sophisticated numerical code, it is a usual practice to compare the results with reliable solutions obtained by other means. This work provides such solutions for…