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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PublicationNew windows to the universe; Proceedings of the Eleventh European Regional Astronomy Meeting, Universidad de la Laguna, Spain, July 3-8, 1989. Part II
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PublicationObservations 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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PublicationOGLE-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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PublicationOn 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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PublicationOn 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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PublicationPHL 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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PublicationRelative 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...
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PublicationScanning the population of planetary systems around stars with wide brown dwarf companions
Stars with wide brown dwarf companions that host exoplanets are extremely rare, as only four were reported to date. Different theories propose that planets can...
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EventSchool: Eclipsing Binaries and Asteroseismology
With numerous active or recently completed public, space-based missions and ground-based follow-up surveys, never before has such a wealth of high-quality and...