BSN-IV: The First Multiband Light Curve Study of Five W UMa-type Contact Binary Systems
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866914104065654784 |
|---|---|
| author | Poro, Atila Michel, Raul Coliac, Jean-François Nastaran, Maryam Lajús, Eduardo Fernández Tamayo, Francisco Javier Aceves, Hector Alicavus, Fahri Najera, Morgan-Rhai |
| author_facet | Poro, Atila Michel, Raul Coliac, Jean-François Nastaran, Maryam Lajús, Eduardo Fernández Tamayo, Francisco Javier Aceves, Hector Alicavus, Fahri Najera, Morgan-Rhai |
| contents | In this work, we present a detailed investigation of five contact binary systems of the W Ursae Majoris (W UMa) type. Multiband photometric observations were conducted using ground-based telescopes in both the northern and southern hemispheres, yielding new times of minima. O-C diagram analysis reveals that two systems exhibit parabolic trends, indicating a gradual long-term decrease in their orbital periods. The light curves were modeled using version 1.0 of the BSN application, with one system requiring the inclusion of a cool starspot to achieve a satisfactory fit. We examined empirical relationships between orbital period and fundamental parameters, identifying the period-semi-major axis (P-a) relation as the most robust correlation, which was used to estimate absolute parameters. To statistically assess thermal equilibrium, we analyzed temperature differences between components and found that 90% of systems exhibit less than 9.4% contrast. Two target systems with extremely low mass ratios were identified, and their orbital stability was evaluated. Based on the effective temperatures and component masses, two systems were classified as W-subtype and three as A-subtype. The evolutionary status of the binaries was assessed through their locations in mass-radius, mass-luminosity, and other empirical diagrams, and initial component masses as well as total mass loss were also estimated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_17367 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | BSN-IV: The First Multiband Light Curve Study of Five W UMa-type Contact Binary Systems Poro, Atila Michel, Raul Coliac, Jean-François Nastaran, Maryam Lajús, Eduardo Fernández Tamayo, Francisco Javier Aceves, Hector Alicavus, Fahri Najera, Morgan-Rhai Solar and Stellar Astrophysics In this work, we present a detailed investigation of five contact binary systems of the W Ursae Majoris (W UMa) type. Multiband photometric observations were conducted using ground-based telescopes in both the northern and southern hemispheres, yielding new times of minima. O-C diagram analysis reveals that two systems exhibit parabolic trends, indicating a gradual long-term decrease in their orbital periods. The light curves were modeled using version 1.0 of the BSN application, with one system requiring the inclusion of a cool starspot to achieve a satisfactory fit. We examined empirical relationships between orbital period and fundamental parameters, identifying the period-semi-major axis (P-a) relation as the most robust correlation, which was used to estimate absolute parameters. To statistically assess thermal equilibrium, we analyzed temperature differences between components and found that 90% of systems exhibit less than 9.4% contrast. Two target systems with extremely low mass ratios were identified, and their orbital stability was evaluated. Based on the effective temperatures and component masses, two systems were classified as W-subtype and three as A-subtype. The evolutionary status of the binaries was assessed through their locations in mass-radius, mass-luminosity, and other empirical diagrams, and initial component masses as well as total mass loss were also estimated. |
| title | BSN-IV: The First Multiband Light Curve Study of Five W UMa-type Contact Binary Systems |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2510.17367 |