High spatial resolution optical imaging of the multiple T Tauri system LkHα 262/LkHα 263
| العنوان: | High spatial resolution optical imaging of the multiple T Tauri system LkHα 262/LkHα 263 |
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| المؤلفون: | L. F. Rodríguez-Ramos, Craig D. Mackay, V. González-Escalera, Sergio Velasco, Lucas Labadie, Anastasio Díaz-Sánchez, David L. King, Jonathan Crass, M. Puga, A. Pérez Garrido, Rafael Rebolo, Jens Zuther, A. Oscoz, Roberto López, B. Femenía |
| المصدر: | Monthly Notices of the Royal Astronomical Society. 460:3519-3528 |
| بيانات النشر: | Oxford University Press (OUP), 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Physics, Proper motion, Astronomy, Astronomy and Astrophysics, Astrophysics, Astrometry, Lucky imaging, 01 natural sciences, 010309 optics, Photometry (optics), T Tauri star, Space and Planetary Science, 0103 physical sciences, Orbital motion, William Herschel Telescope, Adaptive optics, 010303 astronomy & astrophysics |
| الوصف: | We report high spatial resolution i' band imaging of the multiple T Tauri system LkH$\alpha$ 262/LkH$\alpha$ 263 obtained during the first commissioning period of the Adaptive Optics Lucky Imager (AOLI) at the 4.2 m William Herschel Telescope, using its Lucky Imaging mode. AOLI images have provided photometry for each of the two components LkH$\alpha$ 263 A and B (0.41 arcsec separation) and marginal evidence for an unresolved binary or a disc in LkH$\alpha$ 262. The AOLI data combined with previously available and newly obtained optical and infrared imaging show that the three components of LkH$\alpha$ 263 are co-moving, that there is orbital motion in the AB pair, and, remarkably, that LkH$\alpha$ 262-263 is a common proper motion system with less than 1 mas/yr relative motion. We argue that this is a likely five-component gravitationally bounded system. According to BT-settl models the mass of each of the five components is close to 0.4 M$_{\odot}$ and the age is in the range 1-2 Myr. The presence of discs in some of the components offers an interesting opportunity to investigate the formation and evolution of discs in the early stages of multiple very low-mass systems. In particular, we provide tentative evidence that the disc in 263C could be coplanar with the orbit of 263AB. |
| تدمد: | 1365-2966 0035-8711 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6a5ba8957b7baf121ea3be9609a9c58f https://doi.org/10.1093/mnras/stw1071 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........6a5ba8957b7baf121ea3be9609a9c58f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652966 00358711 |
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