Explanipedia

Editorial Open

A. Skopal, R. Komžík · 2025

Spectroscopic characterization of superflares on solar-type stars -- a joint observing campaign Open

M. Leitzinger, P. Kábath, M. Vaňko, T. Pribulla, R. Komžík , et al. · 2024

During the last decade numerous superflares have been detected on solar-type stars using broadband photometry from the Kepler and TESS satellites.Still the spectroscopic exploration of this high-energy phenomenon is lacking.This exploratio…

Editorial Open

A. Skopal, R. Komžík · 2024

In 2023, the journal Contributions of the Astronomical Observatory Skalnaté Pleso (CAOSP) published 9 regular articles on 126 pages within two issues, and 35 articles on 382 pages in the form of two 'Special issues'.According to the

High-resolution échelle spectrograph at Skalnaté Pleso Observatory Open

T. Pribulla, M. Vaňko, R. Komžík, Peter Sivanič · 2024

A clone of échelle spectrograph MUSICOS (MUlti-SIte COntinuous Spectroscopy) is mounted in the Nasmyth-Cassegrain focus of the 1.3m telescope at Skalnaté Pleso Observatory.The spectrograph is a cross-dispersed, bench-mounted, fiber-fed ins…

FM CMa: hot and massive eclipsing binary with a pulsating component Open

M. Vaňko, T. Pribulla, N. Shagatova, R. Komžík, Pavol A. Dubovský · 2024

Long-term spectroscopic monitoring of the eclipsing system FM CMa obtained between 2017 -2023 at the Skalnaté Pleso (SPO, Slovakia) and Cerro-Tololo Interamerican observatories (CTIO, Chile) is presented.Preliminary analysis of the TESS hi…

Studying of exoasteroids orbiting around WD 1145+017 Open

A. Maliuk, J. Budaj, D. E. Mkrtichian, Z. Garai, S. V. Zharikov , et al. · 2024

WD 1145+017 is the first white dwarf known to be orbited by disintegrating exoasteroids.It is a helium-dominated white dwarf with lines of metals in spectra and variable asymmetric transits.The analysis of WD 1145 light curve allowed us to…

Search for the wide-orbit massive companion of XO-7b in the follow-up radial-velocity and transit-timing data: no significant clues Open

Z. Garai, T. Pribulla, R. Komžík · 2023

XO-7b is a hot Jupiter transiting a V = 10.52 mag G0V-type star. The planetary system is interesting because the linear slope in the discovery radial-velocity (RV) data indicated a wide-orbit massive companion. In 2020 we started an RV cam…

Search for the wide-orbit massive companion of XO-7b in the follow-up radial-velocity and transit-timing data: no significant clues Open

Z. Garai, T. Pribulla, R. Komžík · 2023

XO-7b is a hot Jupiter transiting a $V = 10.52$ mag G0V-type star. The planetary system is interesting because the linear slope in the discovery radial-velocity (RV) data indicated a wide-orbit massive companion. In 2020 we started an RV c…

Density asymmetry and wind velocities in the orbital plane of the symbiotic binary EG Andromedae Open

N. Shagatova, A. Skopal, E. Kundra, R. Komžík, S. Yu. Shugarov , et al. · 2023

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 applied efficiently. The driving mechanism of their winds …

Density asymmetry and wind velocities in the orbital plane of the symbiotic binary EG Andromedae Open

N. Shagatova, A. Skopal, E. Kundra, R. Komžík, S. Yu. Shugarov , et al. · 2023

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 applied efficiently. Despite the progress during the past …

BU Canis Minoris – the most compact known flat doubly eclipsing quadruple system Open

T. Pribulla, T. Borkovits, Rahul Jayaraman, S. Rappaport, T. Mitnyan , et al. · 2023

We have found that the 2+2 quadruple star system BU CMi is currently the most compact quadruple system known, with an extremely short outer period of only 121 d. The previous record holder was TIC 219006972 (Kostov et al.), with a period o…

BU Canis Minoris -- the Most Compact Known Flat Doubly Eclipsing Quadruple System Open

T. Pribulla, T. Borkovits, Rahul Jayaraman, S. Rappaport, T. Mitnyan , et al. · 2023

We have found that the 2+2 quadruple star system BU CMi is currently the most compact quadruple system known, with an extremely short outer period of only 121 days. The previous record holder was TIC 219006972 (Kostov et al. 2023), with a …

A study of nine compact triply eclipsing triples Open

S. Rappaport, T. Borkovits, R. Gagliano, Thomas L. Jacobs, Andreï Tokovinin , et al. · 2023

In this work, we report the independent discovery and analysis of nine new compact triply eclipsing triple star systems found with the Transiting Exoplanet Survey Satellite (TESS) mission: TICs 47151245, 81525800, 99013269, 229785001, 2761…

Editorial Open

A. Skopal, R. Komžík · 2023

In 2022, the journal Contributions of the Astronomical Observatory Skalnaté Pleso (CAOSP) published 19 articles on 253 pages within three issues.

HD 183986: A High-contrast SB2 System with a Pulsating Component Open

M. Vaňko, T. Pribulla, P. Gajdoš, J. Budaj, J. Zverko , et al. · 2022

There is a small group of peculiar early-type stars on the main sequence that show different rotation velocities from different spectral lines. This inconsistency might be due to the binary nature of these objects. We aim to verify this hy…

Rapidly rotating stars and their transiting planets: KELT-17b, KELT-19Ab, and KELT-21b in the CHEOPS and TESS era Open

Z. Garai, T. Pribulla, J. Kovács, Gy. M. Szabó, A. Claret , et al. · 2022

Rapidly rotating early-type main-sequence stars with transiting planets are interesting in many aspects. Unfortunately, several astrophysical effects in such systems are not well understood yet. Therefore, we performed a photometric mini-s…

Editorial Open

A. Skopal, R. Komžík · 2022

During 2021, the journal Contributions of the Astronomical Observatory Skalnaté Pleso (CAOSP) published 22 articles on 264 pages, and composed of three issues.Volume 51/1 features the third, final part of the review articles on beta Lyrae …

Triply eclipsing triple stars in the northern TESS fields: TICs 193993801, 388459317, and 52041148 Open

T. Borkovits, T. Mitnyan, S. Rappaport, T. Pribulla, Brian P. Powell , et al. · 2021

In this work we report the discovery and analysis of three new triply eclipsing triple star systems found with the TESS mission during its observations of the northern skies: TICs 193993801, 388459317, and 52041148. We utilized the TESS pr…

V680 Mon – a young mercury–manganese star in an eclipsing heartbeat system Open

E. Paunzen, Stefan Hümmerich, M. Fedurco, Klaus Bernhard, R. Komžík , et al. · 2021

Chemically peculiar stars in eclipsing binary systems are rare objects that allow the derivation of fundamental stellar parameters and important information on evolutionary status and the origin of the observed chemical peculiarities. Here…

Editorial Open

A. Skopal, R. Komžík · 2021

The 2017 May 20 stellar occultation by the elongated centaur (95626) 2002 GZ32 Open

P. Santos-Sanz, J. L. Ortiz, B. Sicardy, G. Benedetti-Rossi, N. Morales , et al. · 2020

We predicted a stellar occultation of the bright star Gaia DR1 4332852996360346368 (UCAC4 385-75921) (mV = 14.0 mag) by the centaur 2002 GZ32 for 2017 May 20. Our latest shadow path prediction was favourable to a large region in Europe. Ob…

Wind mass transfer in S-type symbiotic binaries Open

N. Shagatova, A. Skopal, S. Yu. Shugarov, R. Komžík, E. Kundra , et al. · 2020

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, its fuelling, and thus the path towards different phases …

Wind mass transfer in S-type symbiotic binaries III. Confirmation of a wind focusing in EG Andromedae from the nebular [OIII]λ5007 line Open

N. Shagatova, A. Skopal, S. Yu. Shugarov, R. Komžík, E. Kundra , et al. · 2020

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 and its fuelling. Aims. In this paper, we indicate a non-s…

Secular changes in the orbits of the quadruple system VW LMi Open

T. Pribulla, Emil Puha, T. Borkovits, J. Budaj, Z. Garai , et al. · 2020

VW LMi is the tightest known quadruple system with 2 + 2 hierarchy. It consists of a W UMa-type eclipsing binary (P12 = 0.477 55 d) and another detached non-eclipsing binary (P34 = 7.93 d) orbiting around a common centre of mass in about P…

Long-term spectroscopic survey of seven interesting CP stars Open

M. Vaňko, T. Pribulla, Ľ. Hambálek, E. Kundra, R. Komžík , et al. · 2020

We present a long-term spectroscopic monitoring of seven CP stars in which binarity has either been established or signs of possible companions have been indicated.The primary goal of the survey was to examine the radial velocities (RVs) v…

Periodic transit timing variations and refined system parameters of the exoplanet XO-6b Open

Z. Garai, T. Pribulla, R. Komžík, E. Kundra, Ľ. Hambálek , et al. · 2019

Only a few exoplanets are known to orbit around fast rotating stars. One of them is XO-6b, which orbits an F5V-type star. Shortly after the discovery, we started multicolor photometric and radial-velocity follow-up observations of XO-6b, u…

Power quality—Evaluation of safe operation of observatories Open

Michael D. Mann, T. Pribulla, Thorsten Döhring, R. Komžík, Peter Sivanič · 2019

The electric power supply of astronomical observatories has to manage a conflict of interest: Observatories are situated at remote locations, they have a high consumption of electric power while measuring electric signals as sensitively as…

Photometry of Symbiotic Stars - XIV Open

M. Sekeráš, A. Skopal, S. Yu. Shugarov, N. Shagatova, E. Kundra , et al. · 2019

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 newly discovered (August 2018) symbiotic star HBHA 1704-05…

TYC 3637-1152-1 – A high amplitude δ Scuti star with peculiar pulsational properties Open

E. Paunzen, Klaus Bernhard, Moriz Frauenberger, Santiago Helbig, Andreas Herdin , et al. · 2018

$τ$ Ori and $τ$ Lib: Two new massive heartbeat binaries Open

A. Pigulski, M. K. Kamińska, K. Kamínski, E. Paunzen, J. Budaj , et al. · 2018

We report the discovery of two massive eccentric systems with BRITE data, $τ$ Ori and $τ$ Lib, showing heartbeat effects close to the periastron passage. $τ$ Lib exhibits shallow eclipses that will soon vanish due to the apsidal motion in …

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