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V1309 Scorpii: merger of a contact binary
- R. Tylenda, M. Hajduk, K. Ulaczyk
- Physics
- 1 December 2010
Context. Stellar mergers are expected to take place in numerous circumstences in the evolution of stellar systems. In particular, they are considered as a plausible origin of stellar eruptions of the…
PO and PN in the wind of the oxygen-rich AGB star IK Tauri
- E. Beck, T. Kami'nski, L. Decin
- Physics
- 20 September 2013
Phosphorus-bearing compounds have only been studied in the circumstellar environments (CSEs) of the asymptotic giant branch (AGB) star IRC +10216 and the protoplanetary nebula CRL 2688, both C-rich…
An observational study of dust nucleation in Mira ($o$ Ceti): I. Variable features of AlO and other Al-bearing species
- T. Kami'nski, K. T. Wong, N. Patel
- Physics
- 19 April 2016
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 the circumstellar…
Resolving the extended atmosphere and the inner wind of Mira ($o$ Ceti) with long ALMA baselines
- K. T. Wong, T. Kami'nski, K. Menten, F. Wyrowski
- Physics
- 10 March 2016
The prototypical Mira variable, $o$ Cet (Mira), has been observed as a Science Verification target in the 2014 ALMA Long Baseline Campaign with a longest baseline of 15 km. ALMA clearly resolves the…
An observational study of dust nucleation in Mira ($o$ Ceti): II. Titanium oxides are negligible for nucleation at high temperatures
- T. Kami'nski, H. Muller, N. Patel
- Physics, Geology
- 4 October 2016
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 the stellar…
Keck/HIRES Spectroscopy of V838 Monocerotis in October 2005
- T. Kami'nski, M. Schmidt, R. Tylenda, M. Konacki, M. Gromadzki
- Physics
- 22 December 2008
V838 Monocerotis (V838 Mon) erupted at the beginning of 2002 becoming an extremely luminous star with L 106 L ☉. Among various scenarios proposed to explain the nature of the outburst, the most…
VLT/UVES spectroscopy of V4332 Sagittarii in 2005: The best view on a decade-old stellar-merger remnant
- R. Tylenda, S. K. G'orny, T. Kami'nski, M. Schmidt
- Physics
- 25 December 2014
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 molecules superimposed on…
Circumstellar ammonia in oxygen-rich evolved stars
- K. T. Wong, K. Menten, T. Kami'nski, F. Wyrowski, J. Lacy, T. Greathouse
- Physics
- 3 October 2017
The circumstellar ammonia (NH$_3$) chemistry in evolved stars is poorly understood. Previous observations and modelling showed that NH$_3$ abundance in oxygen-rich stars is several orders of…
Evolution of the stellar-merger red nova V1309 Scorpii: SED analysis
- R. Tylenda, T. Kami'nski
- Physics
- 30 June 2016
One very important object for understanding the nature of red novae is V1309 Sco. Its pre-outburst observations showed that, before its red-nova eruption in 2008, it was a contact binary quickly…
High-resolution optical spectroscopy of V838 Monocerotis in 2009
- R. Tylenda, T. Kami'nski, M. Schmidt, R. Kurtev, T. Tomov
- Physics
- 9 March 2011
Context. V838 Mon erupted at the beginning of 2002. In the course of the outburst the object evolved to low effective temperatures and declined as a very late M-type supergiant. Among various…
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