تقرير
Further milliarcsecond resolution results on cool giants and binary stars from lunar occultations at Devashtal
| العنوان: | Further milliarcsecond resolution results on cool giants and binary stars from lunar occultations at Devashtal |
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| المؤلفون: | Richichi, A., Sharma, Saurabh, Sinha, T., Pandey, R., Ghosh, A., Ojha, D. K., Pandey, A. K., Naik, M. B. |
| سنة النشر: | 2020 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | We report on 26 lunar occultation events observed in the context of a program started at Devasthal in 2017. In addition to the customary observations with the 1.3-m telescope, we report here also the first attempts performed with the TIRCAM2 camera at the 3.6-m DOT telescope in the near-IR. The results consist in the first-time angular diameters for two late-type giants, in a measurement of the well-known AGB pulsating variable SW~Vir, and in the measurement of eight small separation binaries one of which is detected for the first time (HR~1860). We also measured the wider binaries SAO~94431 and 55~Tau (twice). The remaining sources were found to be unresolved with upper limits as small as 1~milliarcsecond. We plan to develop further the high-speed capability of the TIRCAM2 instrument, so as to include in our program also more near-infrared, highly extincted sources. Comment: Accepted for publication in MNRAS main journal, 7 pages, 3 figures, 3 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/staa2403 |
| URL الوصول: | http://arxiv.org/abs/2008.03459 |
| رقم الأكسشن: | edsarx.2008.03459 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/staa2403 |
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