24 citations · 72 across the 11 of their papers we have counts for
11 papers
V1047 Cen: The first Z And-type outburst observed in the classical nova binary
Augustin Skopal, Natalia Shagatova
In 2019, the classical nova V1047 Cen experienced an unusual outburst, the nature of which has not yet been clearly determined. In this paper, we show that the 2019 V1047~Cen outbu…
Wind-mass transfer in S-type symbiotic binaries IV. Indication of high wind-mass-transfer efficiency from active phases
Augustin Skopal, Natalia Shagatova
Observational indications of wind-mass transfer from an evolved giant to its distant white dwarf (WD) companion in symbiotic binaries are rare. Here, we present a way to examine th…
Density asymmetry and wind velocities in the orbital plane of the symbiotic binary EG Andromedae
N. Shagatova, A. Skopal, E. Kundra +4
Context. Non-dusty late-type giants without a corona and large-scale pulsations represent objects that do not fulfil the conditions under which standard mass-loss mechanisms can be…
Wind mass transfer in S-type symbiotic binaries III. Confirmation of a wind focusing in EG Andromedae from the nebular [OIII]λ5007 line
N. Shagatova, A. Skopal, S. Yu. Shugarov +3
Context. The structure of the wind from the cool giants in symbiotic binaries carries important information for understanding the wind mass transfer to their white dwarf companions…
The path to Z And-type outbursts: The case of V426 Sagittae (HBHA 1704-05)
A. Skopal, S. Yu. Shugarov, U. Munari +16
The star V426 Sge (HBHA~1704-05), originally classified as an emission-line object and a semi-regular variable, brightened at the beginning of August 2018, showing signatures of a…
Photometry of Symbiotic Stars - XIV
M. Sekeráš, A. Skopal, S. Shugarov +7
We present new multicolour UBVRcIc photometric observations of symbiotic stars, EG And, Z And, BF Cyg, CH Cyg, CI Cyg, V1016 Cyg, V1329 Cyg, AG Dra, RS Oph, AG Peg, AX Per, and the…
Wind asymmetry imprint in the UV light curves of the symbiotic binary SY Mus
Natalia Shagatova, Augustin Skopal
Context: Light curves (LCs) of some symbiotic stars show a different slope of the ascending and descending branch of their minimum profile. The origin of this asymmetry is not unde…
Wind mass transfer in S-type symbiotic binaries II. Indication of wind focusing
Natalia Shagatova, Augustin Skopal, Zuzana Carikova
Context. The wind mass transfer from a giant to its white dwarf companion in symbiotic binaries is not well understood. For example, the efficiency of wind mass transfer of the can…
Indication of the High Mass-Transfer Ratio in S-type Symbiotic Binaries
Natalia Shagatova, Augustin Skopal
By modelling H column densities in eclipsing S-type symbiotic stars EG And and SY Mus, we derived the wind velocity profile and the corresponding mass-loss rate from their gian…
Evolved stars as donors in symbiotic binaries
A. Skopal, M. Sekeras, N. Shagatova
This contribution is focused on the role of cool giants in symbiotic binaries. Especially, we pay attention to their mass-loss rates and the wind mass-transfer onto their compact a…
Measuring the orbital inclination of Z Andromedae from Rayleigh scattering
A. Skopal, N. Shagatova
The orbital inclination of the symbiotic prototype Z And has not been established yet. At present, two very different values are considered, i ~ 44 degrees and i >~ 73 degrees. The…