Sergio Hoyer

First Results from the CHEPS: Exoplanets and the Discovery of an Eccentric Brown Dwarf in the Desert (2009)

Jenkins, James S., Jones, Hugh R. A., Gozdziewski, Krzysztof, Migaszewski, Cezary, Barnes, John R., Jones, Matias I., ...

We report the discovery of a brown dwarf on an eccentric orbit and with a semimajor axis that places it in the brown dwarf desert region around the star HD191760. The star has a spectral type of...

Detection of period variations in extrasolar transiting planet OGLE-TR-111b (2008)

Díaz, Rodrigo F., Rojo, Patricio, Melita, Mario, Hoyer, Sergio, Minniti, Dante, Mauas, Pablo J. D., ...

Two consecutive transits of planetary companion OGLE-TR-111b were observed in the I band. Combining these observations with data from the literature, we find that the timing of the transits cannot be...

Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates IV: The Puzzle of the Extremely Red OGLE-TR-82 Primary Solved (2007)

Hoyer, Sergio, Alegria, Sebastian Ramirez, Ivanov, Valentin D., Minniti, Dante, Pietrzynski, Grzegorz, Ruiz, Maria Teresa, ...

We present precise new V, I, and K-band photometry for the planetary transit candidate star OGLE-TR-82. Good seeing V-band images acquired with VIMOS instrument at ESO VLT allowed us to measure...

Disk evolution in the Ori OB1 association (2004)

Calvet, Nuria, Briceno, Cesar, Hernandez, Jesus, Hoyer, Sergio, Hartmann, Lee, Sicilia-Aguilar, Aurora, ...

We analyze multi-band photometry of a subsample of low mass stars in the associations Ori OB1a and 1b discovered during the CIDA Orion Variability Survey, which have ages of 7 - 10 Myr and 3 - 5 Myr,...