Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II
This study investigates the identification of possible stellar companions in a sample of Be stars using speckle interferometry. Be stars, which are rapidly rotating B-type stars exhibiting emission lines due to the presence of circumstellar disks, have been proposed to potentially reside in binary o...
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2025-01-01
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| author | C. A. Guerrero T. B. Souza M. Borges Fernandes A. D. Guajardo Jurado |
| author_facet | C. A. Guerrero T. B. Souza M. Borges Fernandes A. D. Guajardo Jurado |
| author_sort | C. A. Guerrero |
| collection | DOAJ |
| description | This study investigates the identification of possible stellar companions in a sample of Be stars using speckle interferometry. Be stars, which are rapidly rotating B-type stars exhibiting emission lines due to the presence of circumstellar disks, have been proposed to potentially reside in binary or multiple systems, which could influence their mass transfer processes and disk dynamics. We conducted observations of 46 Be stars using the 2.1 m telescope at the Observatorio Astronómico Nacional, Sierra San Pedro Mártir, Mexico, over two observing campaigns in 2018. With our observations, we identified secondary companions in 12 of the observed stars, five of which are new interferometric pairs. The angular separations of these newly identified pairs ranged from 0 $\mathop{.}\limits^{^{\prime\prime} }$ 09 to 0 $\mathop{.}\limits^{^{\prime\prime} }$ 33, with a maximum magnitude difference of Δ m = 4.72 noted for star HD 41335. We estimated an observed multiplicity rate of ∼26% for our sample, thus reinforcing the existing knowledge of the multiplicity of Be stars. To further investigate the gravitational binding potential of the identified systems, we cross referenced our findings with data from Gaia Data Release 3. This analysis revealed that many potential companions, although not detected in our observations, were too faint (with G magnitudes ≥ 15.2) or too distant (separations greater than 2 $\mathop{.}\limits^{^{\prime\prime} }$ 0) to exert a significant influence on the circumstellar disk dynamics of the primary Be stars. |
| format | Article |
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| institution | DOAJ |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astronomical Journal |
| spelling | doaj-art-aecaf0d3a9ce4484b01a565a3c1fe68b2025-08-20T03:09:39ZengIOP PublishingThe Astronomical Journal1538-38812025-01-01169525110.3847/1538-3881/adbf11Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars IIC. A. Guerrero0https://orcid.org/0000-0002-1113-7489T. B. Souza1https://orcid.org/0000-0002-7831-5809M. Borges Fernandes2https://orcid.org/0000-0001-5740-2914A. D. Guajardo Jurado3https://orcid.org/0009-0000-5433-1401Facultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo Léon , San Nicolás de los Garza, C. P. 66451, Nuevo León, Mexico ; carlos.guerrerop@uanl.edu.mx; Observatório Nacional , Rua General José Cristino 77, CEP: 20921-400, São Cristóvão, Rio de Janeiro, BrazilObservatório Nacional , Rua General José Cristino 77, CEP: 20921-400, São Cristóvão, Rio de Janeiro, Brazil; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso , Av. Gran Bretana 1111, Valparaíso, ChileObservatório Nacional , Rua General José Cristino 77, CEP: 20921-400, São Cristóvão, Rio de Janeiro, BrazilFacultad de Ciencias Físico Matemáticas, Universidad Autónoma de Nuevo Léon , San Nicolás de los Garza, C. P. 66451, Nuevo León, Mexico ; carlos.guerrerop@uanl.edu.mxThis study investigates the identification of possible stellar companions in a sample of Be stars using speckle interferometry. Be stars, which are rapidly rotating B-type stars exhibiting emission lines due to the presence of circumstellar disks, have been proposed to potentially reside in binary or multiple systems, which could influence their mass transfer processes and disk dynamics. We conducted observations of 46 Be stars using the 2.1 m telescope at the Observatorio Astronómico Nacional, Sierra San Pedro Mártir, Mexico, over two observing campaigns in 2018. With our observations, we identified secondary companions in 12 of the observed stars, five of which are new interferometric pairs. The angular separations of these newly identified pairs ranged from 0 $\mathop{.}\limits^{^{\prime\prime} }$ 09 to 0 $\mathop{.}\limits^{^{\prime\prime} }$ 33, with a maximum magnitude difference of Δ m = 4.72 noted for star HD 41335. We estimated an observed multiplicity rate of ∼26% for our sample, thus reinforcing the existing knowledge of the multiplicity of Be stars. To further investigate the gravitational binding potential of the identified systems, we cross referenced our findings with data from Gaia Data Release 3. This analysis revealed that many potential companions, although not detected in our observations, were too faint (with G magnitudes ≥ 15.2) or too distant (separations greater than 2 $\mathop{.}\limits^{^{\prime\prime} }$ 0) to exert a significant influence on the circumstellar disk dynamics of the primary Be stars.https://doi.org/10.3847/1538-3881/adbf11Visual binary starsBe starsHigh angular resolutionInterferometric binary stars |
| spellingShingle | C. A. Guerrero T. B. Souza M. Borges Fernandes A. D. Guajardo Jurado Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II The Astronomical Journal Visual binary stars Be stars High angular resolution Interferometric binary stars |
| title | Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II |
| title_full | Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II |
| title_fullStr | Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II |
| title_full_unstemmed | Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II |
| title_short | Identification of Possible Stellar Companions via Speckle Interferometry in a Sample of Be Stars II |
| title_sort | identification of possible stellar companions via speckle interferometry in a sample of be stars ii |
| topic | Visual binary stars Be stars High angular resolution Interferometric binary stars |
| url | https://doi.org/10.3847/1538-3881/adbf11 |
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