Binary models of symbiotic stars are discussed, analyzing the results of recent IR observations. It is indicated that a binary must have component masses of...
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PublicaciónInfrared variability of symbiotic stars
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PublicaciónMOA-2006-BLG-074: Recognizing Xallarap Contaminants in Planetary Microlensing
MOA-2006-BLG-074 was selected as one of the most promising planetary candidates in a retrospective analysis of the MOA collaboration: its asymmetric high...
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PublicaciónNew windows to the universe; Proceedings of the Eleventh European Regional Astronomy Meeting, Universidad de la Laguna, Spain, July 3-8, 1989. Part II
Recent observational and theoretical investigations of the sun and sunlike stars and of galactic structure and evolution are discussed in reviews and reports...
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PublicaciónObservations of Cygnus X-2 with IUE: Ultraviolet results from a multiwavelength campaign
The observations of the low-mass x ray binary, Cyg X-2, taken with the International Ultraviolet Explorer (IUE) in a campaign conducted in June and October of...
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PublicaciónOGLE-2018-BLG-1700L: Microlensing Planet in Binary Stellar System
We report a planet in a binary that was discovered from the analysis of the microlensing event OGLE-2018-BLG-1700. We identify the triple nature of the lens...
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PublicaciónOn the evolutionary status of two very active visual binaries
HD 36705 (AB Doradus) and HD 155555 (V824 Ara) are two nearby very active cool stars. Both have strong Li I (lambda)6708 resonance lines, implying high surface...
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PublicaciónOn the post-T-Tauri nature of late-type visual companions to B-type stars
We report on intermediate-to-high resolution spectroscopy and standard broadband photometry of late-type visual companions to early-type stars. Our program...
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PublicaciónPHL 932 - Another non-post-AGB central star of planetary nebula
The very high surface gravity and low temperature of PHL 932, a hot subluminous star surrounded by a planetary nebula, imply that it cannot be a post-AGB star...
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PublicaciónRelative lithium abundances in pre-main-sequence spectroscopic binaries
We present a study of the lithium abundance of five pre-main sequence (PMS) double-lined binaries. These binaries are composed of weak-lined T Tauri stars...