Further milliarcsecond resolution results on cool giants and binary stars from lunar occultations at Devashtal
arXiv:2008.03459 · doi:10.1093/mnras/staa2403
Abstract
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.
arXiv commentAccepted for publication in MNRAS main journal, 7 pages, 3 figures, 3 tables
References in corpus (8)
- Stellar and substellar companions of nearby stars from Gaia DR2 - Binarity from proper motion anomaly
- A Catalog of Multiplicity among Bright Stellar Systems
- A spectroscopic survey on the multiplicity of high-mass stars
- Predicting Stellar Angular Sizes
- Observations of Binary Stars with the Differential Speckle Survey Instrument. VII. Measures from 2010 September to 2012 February at the WIYN Telescope
- Spectroscopic binaries among Hipparcos M giants I. Data, orbits, and intrinsic variations
- Evidence of asymmetries in the Aldebaran photosphere from multi-wavelength lunar occultations
- TIRCAM2: The TIFR Near Infrared Imaging Camera