Results 281 to 290 of about 52,158 (299)

Multiplicity of Contact Binary Stars

2007
We present results of a preliminary investigation of triple star incidence for contact binary stars. The goal is to shed light on the possible role of distant companions which may have acquired and/or absorbed AM during evolution of multiple systems facilitating or enabling formation of contact binaries.
T. Pribulla, S.M. Rucinski
openaire   +1 more source

Reanalyzing the Light Curves and Absolute Parameters of Twenty Contact Binary Stars Using Tess Data

Astrophysics
Reanalyzing contact binaries with space-based photometric data and investigating possible parameter changes can yield accurate samples for theoretical studies.
E. Paki, A. Poro
semanticscholar   +1 more source

V0644 Ser: An Active Ultrashort Period Contact Binary Star

Research in Astronomy and Astrophysics, 2022
Abstract The photometric solutions of the ultrashort period close binary V0644 Ser based on our new complete BVRI light curves are derived by the Wilson–Devininney code. The results show that V0644 Ser is a W-type shallow contact binary, and the third light was found in the
Hu-Shan Xu, Li-Ying Zhu, Sarotsakulchai Thawicharat, Soonthornthum Boonrucksar   +3 more
openaire   +1 more source

BSN-III: The First Multiband Photometric Study on the Eight Total Eclipse Contact Binary Stars

This study continues our in-depth investigation of total-eclipse W Ursae Majoris-type contact binaries by analyzing eight new systems, complementing our previous work.
A. Poro, Kai Li, R. Michel, Li-heng Wang, F. Aliçavuş, G. Alizadeh, Liliana Altamirano-D'evora, F. J. Tamayo, H. Aceves   +8 more
semanticscholar   +1 more source

KIC 4762887: A near-contact binary or an ellipsoidal variable star?

New Astronomy, 2021
Abstract KIC 4762887 is a variable star with a very small amplitude discovered by K e p l e r and show the EW-type light curve. We analyzed the light curve of KIC 4762887 by using the 2015 version of the Wilson-Devinney code. The results indicated that it is not a contact binary, maybe not even an eclipsing binary.
Xu-Zhi Li, Liang Liu
openaire   +1 more source

Optical flares detected on a contact binary: The first photometric and spectroscopic analysis of a long-period low mass ratio contact binary HAT 307-0007476

Monthly notices of the Royal Astronomical Society
This paper presents the photometric and spectroscopic analysis of a long-period totally eclipsing contact binary (HAT 307-0007476) for the first time. This system is a low mass ratio (q ∼ 0.114) and medium contact binary (f ∼ 37.1 %).
Ling-Zhi Li, Kai Li, Xiang Gao, Xiaodian Chen, Shuai Feng, D. Gao, Di-Fu Guo, Xu Chen, Xing Gao, Guo-You Sun, Shahidin Yaqup Chunhai Bai, A. Esamdin   +11 more
semanticscholar   +1 more source

Updated catalogue of the light curve solutions of contact binary stars

Astronomische Nachrichten, 2007
AbstractThe catalogue of the light curve solutions of contact binary stars was updated. Based on the catalogue data we call the attention to a remarkable gap in the temperature distribution of contact binaries which remained unexplained. The absolute dimensions of the components were calculated in a reliable way. (© 2007 WILEY‐VCH Verlag GmbH & Co.
Sz. Csizmadia, G. Marton, P. Klagyivik, Sz. Spindler   +3 more
openaire   +1 more source

Spectroscopic and photometeric study of NT Aps – a low-activity W UMa-type contact binary

Publications Astronomical Society of Australia
We have carried out a detailed investigation of eclipsing binary star NT Aps using high cadence photometric observations from the TESS satellite and time-series spectra from EFOSC2 at ESO’s New Technology Telescope.a We have, for the first time ...
Antoaneta A. Avramova-Boncheva, Antoaneta Antonova, H. Korhonen, I. Stateva, S. Stefanov   +4 more
semanticscholar   +1 more source

UV Flux Variation Study in Contact Binary VW Cephei

Despite many attempts, the origin of UV emission line and continuum in contact binary stars remains unclear. We present a substantial UV spectroscopic analysis of VW Cephei, a late-type contact binary system, using 46 low-resolution spectra from the ...
A. Baruah, M. Pahari
semanticscholar   +1 more source

Characterization and First Analysis of Three Shallow-Contact Binary Systems

Revista mexicana de astronomía y astrofísica
We present a photometric study and characterization of three contact eclipsing binary systems, analyzed using the Wilson-Devinney code in its Python implementation (PyWD2015).
C. Barani, R. Michel, F. Acerbi, P. Santillán-Ortega   +3 more
semanticscholar   +1 more source