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Ammonia in circumstellar environment of V Cyg
B. Etmański, M. R. Schmidt, R. Szczerba
The HIFI instrument on board of the Herschel Space Observatory (HSO) has been very successful in detecting molecular lines from circumstellar envelopes around evolved stars, like m…
ALMA monitoring of mm line variation in IRC+10216: I. Overview of millimeter variability
J. H. He, T. Kamiński, R. E. Mennickent +7
Temporal variation of millimeter lines is a new direction of research for evolved stars. It has the potential to probe the dynamical wind launching processes from time dimension. W…
An observational study of dust nucleation in Mira ( Ceti): II. Titanium oxides are negligible for nucleation at high temperatures
T. Kamiński, H. S. P. Müller, M. R. Schmidt +7
The formation of silicate dust in oxygen-rich envelopes of evolved stars is thought to be initiated by formation of seed particles that can withstand the high temperatures close to…
Herschel/HIFI observations of the circumstellar ammonia lines in IRC+10216
M. R. Schmidt, J. H. He, R. Szczerba +14
New high-resolution far-infrared (FIR) observations of both ortho- and para-NH3 transitions toward IRC+10216 were obtained with Herschel, with the goal of determining the ammonia a…
An observational study of dust nucleation in Mira ( Ceti): I. Variable features of AlO and other Al-bearing species
T. Kamiński, K. T. Wong, M. R. Schmidt +8
Context: Dust is efficiently produced by cool giant stars, but the condensation of inorganic dust is poorly understood. Aims: Identify and characterize aluminum bearing species in…
VLT/UVES spectroscopy of V4332 Sagittarii in 2005: The best view on a decade-old stellar-merger remnant
R. Tylenda, S. K. Górny, T. Kamiński +1
V4332 Sgr is a red transient (red nova) whose eruption was observed in 1994. The remnant of the eruption shows a unique optical spectrum: strong emission lines of atoms and molecul…