BSN-III: The First Multiband Photometric Study on the Eight Total Eclipse Contact Binary Stars
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913962268819456 |
|---|---|
| author | Poro, Atila Li, Kai Michel, Raul Wang, Li-Heng Alicavus, Fahri Alizadeh, Ghazal Altamirano-Dévora, Liliana Tamayo, Francisco Javier Aceves, Hector |
| author_facet | Poro, Atila Li, Kai Michel, Raul Wang, Li-Heng Alicavus, Fahri Alizadeh, Ghazal Altamirano-Dévora, Liliana Tamayo, Francisco Javier Aceves, Hector |
| contents | 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. Multiband $BVR_cI_c$ photometric data were acquired through ground-based observations at an observatory in Mexico, from which new times of minima were determined. Our analysis of orbital period variations using the O-C method revealed that one system shows no long-term variation, four systems exhibit a secular decrease in their orbital periods, and two systems exhibit a secular increase, suggesting mass transfer between the components. Notably, one system displays a cyclic variation with an amplitude of 0.00865 days and a period of 10.49 years, which we attribute to the light travel time effect induced by a tertiary companion, possibly a brown dwarf. We modeled the light curves using the PHOEBE Python code. Six of the target systems required the inclusion of a cold starspot on one of the system's stars due to the asymmetry observed in the maxima of their light curves. Absolute parameters were estimated using the Gaia DR3 parallax method. Using the components' effective temperatures and masses, we classified five of the systems as W-subtype and three as A-subtype. The stellar evolution was illustrated through the mass-radius and mass-luminosity diagrams. Furthermore, we investigated the dynamical stability of two systems with extremely low mass ratios. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_20607 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | BSN-III: The First Multiband Photometric Study on the Eight Total Eclipse Contact Binary Stars Poro, Atila Li, Kai Michel, Raul Wang, Li-Heng Alicavus, Fahri Alizadeh, Ghazal Altamirano-Dévora, Liliana Tamayo, Francisco Javier Aceves, Hector Solar and Stellar Astrophysics 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. Multiband $BVR_cI_c$ photometric data were acquired through ground-based observations at an observatory in Mexico, from which new times of minima were determined. Our analysis of orbital period variations using the O-C method revealed that one system shows no long-term variation, four systems exhibit a secular decrease in their orbital periods, and two systems exhibit a secular increase, suggesting mass transfer between the components. Notably, one system displays a cyclic variation with an amplitude of 0.00865 days and a period of 10.49 years, which we attribute to the light travel time effect induced by a tertiary companion, possibly a brown dwarf. We modeled the light curves using the PHOEBE Python code. Six of the target systems required the inclusion of a cold starspot on one of the system's stars due to the asymmetry observed in the maxima of their light curves. Absolute parameters were estimated using the Gaia DR3 parallax method. Using the components' effective temperatures and masses, we classified five of the systems as W-subtype and three as A-subtype. The stellar evolution was illustrated through the mass-radius and mass-luminosity diagrams. Furthermore, we investigated the dynamical stability of two systems with extremely low mass ratios. |
| title | BSN-III: The First Multiband Photometric Study on the Eight Total Eclipse Contact Binary Stars |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2507.20607 |