47 citations · 561 across the 35 of their papers we have counts for
29 papers · 1 filter
Solaris photometric survey: Search for circumbinary companions using eclipse timing variations
Ayush Moharana, K. G. Hełminiak, F. Marcadon +8
Eclipse timing variations (ETV) have been a successful tool for detecting circumbinary companions to eclipsing binaries (EB). While TESS and Kepler have been prolific for ETV searc…
The Gaia alerted fading of the FUor-type star Gaia21elv
Zsófia Nagy, Sunkyung Park, Péter Ábrahám +26
FU Orionis objects (FUors) are eruptive young stars, which exhibit outbursts that last from decades to a century. Due to the duration of their outbursts, and to the fact that only…
Strong Variability in AzV 493, an Extreme Oe-Type Star in the SMC
M. S. Oey, N. Castro, M. Renzo +11
We present 18 years of OGLE photometry together with spectra obtained over 12 years, revealing that the early Oe star AzV 493 shows strong photometric (Delta I < 1.2 mag) and spect…
New Short-Period Delta Scuti Stars in OGLE-IV Fields toward the Galactic Bulge
P. Pietrukowicz, M. Ratajczak, I. Soszynski +12
We report the classification of 24 puzzling short-period variable stars located in OGLE-IV Galactic bulge fields. The stars are low-amplitude (<0.05 mag) multi-periodic objects wit…
The OGLE Collection of Variable Stars. Nearly 66,000 Mira stars in the Milky Way
Patryk Iwanek, Igor Soszyński, Szymon Kozłowski +12
We present a collection of 65,981 Mira-type variable stars found in the Optical Gravitational Lensing Experiment (OGLE) project database. Two-thirds of our sample (40,356 objects)…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XII. A sample of systems with photometry
K. G. Hełminiak, A. Moharana, T. Pawar +10
We present results of the analysis of light and radial velocity (RV) curves of eight detached eclipsing binaries observed by the All-Sky Automated Survey, which we have followed up…
The OGLE Collection of Variable Stars. One Thousand Heartbeat Stars in the Galactic Bulge and Magellanic Clouds
Marcin Wrona, Milena Ratajczak, Piotr A. Kołaczek-Szymański +13
We present a collection of 991 heartbeat star (HBS) candidates found in the Optical Gravitational Lensing Experiment (OGLE) project data archive. We discuss the selection process o…
Photometric Analysis of the OGLE Heartbeat Stars
Marcin Wrona, Piotr A. Kołaczek-Szymański, Milena Ratajczak +1
We present an analysis of 991 heartbeat stars (HBSs) from the OGLE Collection of Variable Stars (OCVS). The sample consists of 512 objects located toward the Galactic bulge (GB), 4…
Tidally excited oscillations in MACHO 80.7443.1718: Changing amplitudes and frequencies, high-frequency tidally excited mode, and a decrease in the orbital period
P. A. Kołaczek-Szymański, A. Pigulski, M. Wrona +2
Eccentric ellipsoidal variables (aka heartbeat stars) is a class of eccentric binaries in which proximity effects, tidal distortion due to time-dependent tidal potential in particu…
Multiwavelength properties of Miras
Patryk Iwanek, Szymon Kozłowski, Mariusz Gromadzki +12
We comprehensively study the variability of Miras in the Large Magellanic Cloud (LMC) by simultaneous analysing light curves in 14 bands in the range of 0.524 microns. We model…
BRITE observations of Centauri and Lupi, the first non-eclipsing members of the new class of nascent binaries
M. Jerzykiewicz, A. Pigulski, G. Michalska +8
Results of an analysis of the BRITE-Constellation and SMEI photometry and radial-velocity observations, archival and new, of two single-lined spectroscopic binary systems Centa…
Binarity as the Origin of Long Secondary Periods in Red Giant Stars
I. Soszyński, A. Olechowska, M. Ratajczak +13
Long secondary periods (LSPs), observed in a third of pulsating red giant stars, are the only unexplained type of large-amplitude stellar variability known at this time. Here we sh…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- XI. CHIRON investigation of long-period binaries
M. Ratajczak, R. K. Pawłaszek, K. G. Hełminiak +8
We present the results of a spectroscopic campaign on eclipsing binaries with long orbital period (P = 20 - 75 d) carried out with the CHIRON spectrograph. Physical and orbital sol…
Analysis of eclipsing binaries in multiple stellar systems: the case of V1200 Centauri
F. Marcadon, K. G. Hełminiak, J. P. Marques +5
We present a new analysis of the multiple star V1200 Centauri based on the most recent observations for this system. We used the photometric observations from the Solaris network a…
HIDES spectroscopy of bright detached eclipsing binaries from the field - III. Spectral analysis, updated parameters, and new systems
K. G. Hełminiak, M. Konacki, H. Maehara +5
We present the latest results of our spectroscopic observations and refined modelling of a sample of detached eclipsing binaries (DEBs), selected from the } Eclipsing Binar…
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - X. Three high-contrast systems with secondaries detected with IR spectroscopy
K. G. Hełminiak, A. Tokovinin, E. Niemczura +13
We present results of the combined photometric and spectroscopic analysis of three detached eclipsing binaries, which secondary components are not visible or very hard to identify…
Tracking the spin axes orbital alignment in selected binary systems - Torun Rossiter-McLaughlin effect survey
P. Sybilski, R. K. Pawłaszek, A. Sybilska +4
We have obtained high-resolution spectra of four eclipsing binary systems (FM Leo, NN Del, V963 Cen and AI Phe) with the view to gaining insight into the relative orientation of th…
Ori and Lib: Two new massive heartbeat binaries
Andrzej Pigulski, Monika K. Kaminska, Krzysztof Kaminski +28
We report the discovery of two massive eccentric systems with BRITE data, Ori and Lib, showing heartbeat effects close to the periastron passage. Lib exhibits shallow e…
Pulsations in close binaries from the BRITE point of view
A. Pigulski, M. Jerzykiewicz, M. Ratajczak +2
Using BRITE photometric data for several close binary systems we address the problem of damping pulsations in close binary systems due to proximity effects. Because of small number…
HIDES spectroscopy of bright detached eclipsing binaries from the field - II. Double- and triple-lined objects
K. G. Hełminiak, N. Ukita, E. Kambe +5
We present the results of our spectroscopic observations of eight detached eclipsing binaries (DEBs), selected from the Eclipsing Binary Catalog. Radial velocities (RVs) w…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue -- IX. Spotted pairs with red giants
M. Ratajczak, K. G. Hełminiak, M. Konacki +8
We present spectroscopic and photometric solutions for three spotted systems with red giant components. Absolute physical and orbital parameters for these double-lined detached ecl…
HIDES spectroscopy of bright detached eclipsing binaries from the field - I. Single-lined objects
K. G. Hełminiak, N. Ukita, E. Kambe +5
We present results of our spectroscopic observations of nine detached eclipsing binaries (DEBs), selected from the Eclipsing Binary Catalog, that only show one set of spec…
Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue - VII. V1200 Centauri: a bright triple in the Hyades moving group
J. Coronado, K. G. Hełminiak, L. Vanzi +6
We present the orbital and physical parameters of the detached eclipsing binary V1200~Centauri (ASAS~J135218-3837.3) from the analysis of spectroscopic observations and light curve…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - VIII. The totally-eclipsing double-giant system HD 187669
K. G. Hełminiak, D. Graczyk, M. Konacki +14
We present the first full orbital and physical analysis of HD 187669, recognized by the All-Sky Automated Survey (ASAS) as the eclipsing binary ASAS J195222-3233.7. We combined mul…