Browsing by Subject "Methods statistical"

Now showing items 1-5 of 5

    • A direct imaging survey of spitzer-detected debris disks: occurrence of giant planets in dusty systems 
      Meshkat, Tiffany; Mawet, Dimitri; Bryan, Marta L.; Hinkley, Sasha; Bowler, Brendan P.; Stapelfeldt, Karl R.; Batygin, Konstantin; Padgett, Deborah; Morales, Farisa Y.; Serabyn, Eugene; Christiaens, Valentin; Brandt, Timothy D.; Wahhaj, Zahed (IOP Publishing Ltd., 2017)
      We describe a joint high-contrast imaging survey for planets at the Keck and Very Large Telescope of the last large sample of debris disks identified by the Spitzer Space Telescope. No new substellar companions were ...
    • Low dimensional embedding of climate data for radio astronomical site testing in the Colombian Andes 
      Chaparro Molano, Germán; Ramírez Suarez, Oscar Leonardo; Restrepo Gaitán, Oscar Alberto; Martínez Mercado, Alexander Marcial (IOP Publishing Ltd, 2017)
      We set out to evaluate the potential of the Colombian Andes for millimeter-wave astronomical observations. Previous studies for astronomical site testing in this region have suggested that nighttime humidity and cloud cover ...
    • Near infrared variability of obscured and unobscured X-Ray selected AGN in the Cosmos field 
      Sánchez, P.; Lira Teillery, Paulina; Cartier Ugarte, Regis; Pérez, V.; Miranda, N.; Yovaniniz, C.; Arévalo, P.; Milvang Jensen, B.; Fynbo, J.; Dunlop, J.; Coppi, P.; Marchesi, S. (IOP Publishing Ltd., 2017)
      We present our statistical study of near-infrared (NIR) variability of X-ray-selected active galactic nuclei (AGNs) in the COSMOS field, using UltraVISTA data. This is the largest sample of AGN light curves in YJHK(s) ...
    • Size and shape of chariklo from multi epoch stellar occultations 
      Leiva, R.; Sicardy, B.; Camargo, J. I. B.; Kervella, P. (IOP Publishing Ltd, 2017)
      We use data from five stellar occultations observed between 2013 and 2016 to constrain Chariklo's size and shape, and the ring reflectivity. We consider four possible models for Chariklo (sphere, Maclaurin spheroid, triaxial ...
    • The test case of HD 26965: difficulties disentangling weak doppler signals from stellar activity 
      Díaz, Matias R.; Jenkins, James Stewart; Tuomi, Mikko; Butler, R. Paul; Soto, Maritza G.; Teske, Johanna K.; Feng, Fabo; Shectman, Stephen A.; Arriagada, Pamela; Crane, Jeffrey D.; Thompson, Ian B.; Vogt, Steven S. (IOP Publishing Ltd, 2018)
      We report the discovery of a radial velocity signal that can be interpreted as a planetary-mass candidate orbiting the K dwarf HD 26965, with an orbital period of 42.364 +/- 0.015 days, or alternatively, as the presence ...