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The spectroscopic binary system Gl 375. I. Orbital parameters and chromospheric activity
Rodrigo F. Díaz, Jorge F. González, Carolina Cincunegui +1
We study the spectroscopic binary system Gl 375. We employ medium resolution echelle spectra obtained at the 2.15 m telescope at the Argentinian observatory CASLEO and photometric…
The Na I D resonance lines in main sequence late-type stars
Rodrigo F. Díaz, Carolina Cincunegui, Pablo J. D. Mauas
We study the sodium D lines (D1: 5895.92 Å; D2: 5889.95 Å) in late-type dwarf stars. The stars have spectral types between F6 and M5.5 (B-V between 0.457 and 1.807) and metallicity…
Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates III: Accurate Radius and Period for OGLE-TR-111-b
Dante Minniti, José Miguel Fernández, Rodrigo F. Díaz +6
We present accurate V-band photometry for a planetary transit of OGLE-TR-111 acquired with VIMOS at the ESO Very Large Telescope. The measurement of this transit allows to refine t…
Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates: II. Transits of OGLE-TR-113-b in the Optical and Near-IR
Rodrigo F. Díaz, Sebastián Ramírez, José Miguel Fernández +10
We present precise V and Ks-band transit photometry for the planetary host star OGLE-TR-113. Using the Ks-band photometry, we confirm the dwarf nature of OGLE-TR-113, and obtain ne…