Before using three-dimensional (3D) magnetohydrodynamical (MHD) simulations of the solar photosphere in the determination of elemental abundances, one has to...
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PublicaciónThe Polarization Signature of Photospheric Magnetic Fields in 3D MHD Simulations and Observations at Disk Center
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PublicaciónThe population of variable stars in M54 (NGC6715)
We present new B, V and I CCD time-series photometry for 177 variable stars in a 13 × 13arcmin2 field centred on the globular cluster M54 (lying at the centre...
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PublicaciónThe pre-main-sequence binary HK Ori: spectro-astrometry and EXPORT data
In this paper we present multi-epoch observations of the pre-main-sequence binary HK Ori. These data have been drawn from the EXPORT data base and are...
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PublicaciónThe Pristine Inner Galaxy Survey (PIGS) II: Uncovering the most metal-poor populations in the inner Milky Way
Metal-poor stars are important tools for tracing the early history of the Milky Way, and for learning about the first generations of stars. Simulations suggest...
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PublicaciónThe Pristine Inner Galaxy Survey (PIGS) III: carbon-enhanced metal-poor stars in the bulge
The most metal-deficient stars hold important clues about the early buildup and chemical evolution of the Milky Way, and carbon-enhanced metal-poor (CEMP) stars...
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PublicaciónThe Pristine survey - XX. GTC follow-up observations of extremely metal-poor stars identified from Pristine and LAMOST
Ultra-metal-poor stars ($\rm {[Fe/H]} \lt -4.0$) are very rare, and finding them is a challenging task. Both narrow-band photometry and low-resolution...
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PublicaciónThe pulsational behaviour of the rapidly oscillating Ap star HD 122970 during two photometric multisite campaigns
We undertook two time-series photometric multisite campaigns for the rapidly oscillating Ap star HD 122970. The first one, conducted in 1998, resulted in 119h...
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PublicaciónThe quiet Sun magnetic field observed with ZIMPOL on THEMIS. I. The probability density function
Context: The quiet Sun magnetic field probability density function (PDF) remains poorly known. Modeling this field also introduces a magnetic filling factor...
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PublicaciónThe rapidly oscillating Ap star HD 99563 and its distorted dipole pulsation mode
We undertook a time-series photometric multisite campaign for the rapidly oscillating Ap (roAp) star HD 99563 and also acquired mean light observations over...