New Ultracool Companions to Nearby White Dwarfs
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866909417866264576 |
|---|---|
| author | Bravo, Alexia Schneider, Adam C. Casewell, Sarah Rothermich, Austin Faherty, Jacqueline K. French, Jenni R. Bickle, Thomas P. Meisner, Aaron M. Kirkpatrick, J. Davy Kuchner, Marc J. Burgasser, Adam J. Marocco, Federico Debes, John H. Sainio, Arttu Gramaize, Léopold Kiwy, Frank Jalowiczor, Peter A. Abdullahi, Awab |
| author_facet | Bravo, Alexia Schneider, Adam C. Casewell, Sarah Rothermich, Austin Faherty, Jacqueline K. French, Jenni R. Bickle, Thomas P. Meisner, Aaron M. Kirkpatrick, J. Davy Kuchner, Marc J. Burgasser, Adam J. Marocco, Federico Debes, John H. Sainio, Arttu Gramaize, Léopold Kiwy, Frank Jalowiczor, Peter A. Abdullahi, Awab |
| contents | We conducted a search for new ultracool companions to nearby white dwarfs using multiple methods, including the analysis of colors and examination of images in both the optical and the infrared. Through this process, we identified fifty-one previously unrecognized systems with candidate ultracool companions. Thirty-one of these systems are resolved in at least one catalog, and all but six are confirmed as co-moving companions via common proper motion and consistent parallax measurements (when available). We have followed up four co-moving companions with near-infrared spectroscopy and confirm their ultracool nature. The remaining twenty candidates are unresolved, but show clear signs of infrared excess which is most likely due to the presence of a cold, low-mass companion or a dusty circumstellar disk. Three of these unresolved systems have existing optical spectra that clearly show the presence of a cool stellar companion to the white dwarf primary via spectral decomposition. These new discoveries, along with our age estimates for the primary white dwarfs, will serve as valuable benchmark systems for future characterization of ultracool dwarfs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_04597 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | New Ultracool Companions to Nearby White Dwarfs Bravo, Alexia Schneider, Adam C. Casewell, Sarah Rothermich, Austin Faherty, Jacqueline K. French, Jenni R. Bickle, Thomas P. Meisner, Aaron M. Kirkpatrick, J. Davy Kuchner, Marc J. Burgasser, Adam J. Marocco, Federico Debes, John H. Sainio, Arttu Gramaize, Léopold Kiwy, Frank Jalowiczor, Peter A. Abdullahi, Awab Solar and Stellar Astrophysics Earth and Planetary Astrophysics We conducted a search for new ultracool companions to nearby white dwarfs using multiple methods, including the analysis of colors and examination of images in both the optical and the infrared. Through this process, we identified fifty-one previously unrecognized systems with candidate ultracool companions. Thirty-one of these systems are resolved in at least one catalog, and all but six are confirmed as co-moving companions via common proper motion and consistent parallax measurements (when available). We have followed up four co-moving companions with near-infrared spectroscopy and confirm their ultracool nature. The remaining twenty candidates are unresolved, but show clear signs of infrared excess which is most likely due to the presence of a cold, low-mass companion or a dusty circumstellar disk. Three of these unresolved systems have existing optical spectra that clearly show the presence of a cool stellar companion to the white dwarf primary via spectral decomposition. These new discoveries, along with our age estimates for the primary white dwarfs, will serve as valuable benchmark systems for future characterization of ultracool dwarfs. |
| title | New Ultracool Companions to Nearby White Dwarfs |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2412.04597 |