A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period Cutoff
We present a multiband photometric analysis of CRTS J163819.6+03485, the first low-mass-ratio contact binary system with a period of 0.2053321 day under the contact binary period limit. The unprecedented combination of mass ratio and period makes this system unique for eclipsing binary (EB) research...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/acdcf3 |
| _version_ | 1797694438984646656 |
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| author | Athanasios Papageorgiou Panagiota-Eleftheria Christopoulou Eleni Lalounta C. E. Ferreira Lopes Márcio Catelan Andrew J. Drake Panayiotis Ηantzios Ioannis Alikakos |
| author_facet | Athanasios Papageorgiou Panagiota-Eleftheria Christopoulou Eleni Lalounta C. E. Ferreira Lopes Márcio Catelan Andrew J. Drake Panayiotis Ηantzios Ioannis Alikakos |
| author_sort | Athanasios Papageorgiou |
| collection | DOAJ |
| description | We present a multiband photometric analysis of CRTS J163819.6+03485, the first low-mass-ratio contact binary system with a period of 0.2053321 day under the contact binary period limit. The unprecedented combination of mass ratio and period makes this system unique for eclipsing binary (EB) research. Using new multiband photometric observations, we explored the parameter space of this unique total EB system through a detailed scan in the mass ratio–inclination plane and using the pikaia genetic algorithm optimizer. The best set of relative physical parameters and corresponding uncertainties was adopted through Markov Chain Monte Carlo sampling of the parameter space. The resulting mass ratio of the system is q = 0.16 ± 0.01. The absolute parameters were derived by adopting an empirical mass–luminosity relation. Period changes are also investigated by using new observations and archival photometric light curves from massive astronomical surveys, which revealed in a preliminary solution the presence of a possible low-mass tertiary companion. The origin and evolutionary status of the system are investigated through the detached binary formation scenario. |
| first_indexed | 2024-03-12T02:57:59Z |
| format | Article |
| id | doaj.art-51ff924f6719469cb1f8bba9fb1e155f |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T02:57:59Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-51ff924f6719469cb1f8bba9fb1e155f2023-09-03T15:08:39ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01952214110.3847/1538-4357/acdcf3A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period CutoffAthanasios Papageorgiou0https://orcid.org/0000-0002-3039-9257Panagiota-Eleftheria Christopoulou1https://orcid.org/0000-0001-6002-7625Eleni Lalounta2C. E. Ferreira Lopes3https://orcid.org/0000-0002-8525-7977Márcio Catelan4https://orcid.org/0000-0001-6003-8877Andrew J. Drake5https://orcid.org/0000-0003-0228-6594Panayiotis Ηantzios6Ioannis Alikakos7https://orcid.org/0000-0001-6550-1752Department of Physics, University of Patras , 26500, Patra, Greece ; apapageorgiou@upatras.grDepartment of Physics, University of Patras , 26500, Patra, Greece ; apapageorgiou@upatras.grDepartment of Physics, University of Patras , 26500, Patra, Greece ; apapageorgiou@upatras.grInstituto de Astronomía y Ciencias Planetarias, Universidad de Atacama , Copayapu 485, 1531772 Copiapó, Chile; Instituto Nacional de Pesquisas Espaciais (INPE/MCTI) , Av. dos Astronautas, 1758, São José dos Campos, SP, 12227-010, BrazilInstituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile , Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile; Millennium Institute of Astrophysics , Nuncio Monseñor Sotero Sanz 100, of. 104, 7500000 Providencia, Santiago, Chile; Centro de Astroingeniería, Facultad de Física, Pontificia Universidad Católica de Chile , Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, ChileCalifornia Institute of Technology , 1200 East California Boulevard, Pasadena, CA 91225, USAInstitute for Astronomy , Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, 15236, Athens, GreeceInstitute for Astronomy , Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, 15236, Athens, GreeceWe present a multiband photometric analysis of CRTS J163819.6+03485, the first low-mass-ratio contact binary system with a period of 0.2053321 day under the contact binary period limit. The unprecedented combination of mass ratio and period makes this system unique for eclipsing binary (EB) research. Using new multiband photometric observations, we explored the parameter space of this unique total EB system through a detailed scan in the mass ratio–inclination plane and using the pikaia genetic algorithm optimizer. The best set of relative physical parameters and corresponding uncertainties was adopted through Markov Chain Monte Carlo sampling of the parameter space. The resulting mass ratio of the system is q = 0.16 ± 0.01. The absolute parameters were derived by adopting an empirical mass–luminosity relation. Period changes are also investigated by using new observations and archival photometric light curves from massive astronomical surveys, which revealed in a preliminary solution the presence of a possible low-mass tertiary companion. The origin and evolutionary status of the system are investigated through the detached binary formation scenario.https://doi.org/10.3847/1538-4357/acdcf3Eclipsing binary starsAstronomy data analysisW Ursae Majoris variable starsAstronomy data modelingFundamental parameters of stars |
| spellingShingle | Athanasios Papageorgiou Panagiota-Eleftheria Christopoulou Eleni Lalounta C. E. Ferreira Lopes Márcio Catelan Andrew J. Drake Panayiotis Ηantzios Ioannis Alikakos A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period Cutoff The Astrophysical Journal Eclipsing binary stars Astronomy data analysis W Ursae Majoris variable stars Astronomy data modeling Fundamental parameters of stars |
| title | A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period Cutoff |
| title_full | A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period Cutoff |
| title_fullStr | A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period Cutoff |
| title_full_unstemmed | A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period Cutoff |
| title_short | A Unique Low-mass-ratio Contact Eclipsing Binary System under the Period Cutoff |
| title_sort | unique low mass ratio contact eclipsing binary system under the period cutoff |
| topic | Eclipsing binary stars Astronomy data analysis W Ursae Majoris variable stars Astronomy data modeling Fundamental parameters of stars |
| url | https://doi.org/10.3847/1538-4357/acdcf3 |
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