0000000000430046

AUTHOR

J. Teuber

showing 2 related works from this author

Flux and color variations of the quadruply imaged quasar HE 0435-1223

2011

aims: We present VRi photometric observations of the quadruply imaged quasar HE 0435-1223, carried out with the Danish 1.54m telescope at the La Silla Observatory. Our aim was to monitor and study the magnitudes and colors of each lensed component as a function of time. methods: We monitored the object during two seasons (2008 and 2009) in the VRi spectral bands, and reduced the data with two independent techniques: difference imaging and PSF (Point Spread Function) fitting.results: Between these two seasons, our results show an evident decrease in flux by ~0.2-0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase (~0.05-0.015) in their V-R …

Point spread functionCosmology and Nongalactic Astrophysics (astro-ph.CO)FluxFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsGravitational microlensing01 natural scienceslaw.inventionTelescopeSettore FIS/05 - Astronomia e AstrofisicaObservatorylaw0103 physical sciencesAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsgeneral – gravitational lensing; weak – techniques: photometric [quasars]Astrophysics::Galaxy AstrophysicsPhysics010308 nuclear & particles physicsphotometric [Techniques]Astrophysics::Instrumentation and Methods for AstrophysicsAstronomy and AstrophysicsQuasargeneral [Quasars]Spectral bandsSpace and Planetary Scienceastro-ph.COAstrophysics::Earth and Planetary Astrophysicsweak [Gravitational lensing]Astrophysics - Cosmology and Nongalactic Astrophysics
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Inferring statistics of planet populations by means of automated microlensing searches

2008

(abridged) The study of other worlds is key to understanding our own, and not only provides clues to the origin of our civilization, but also looks into its future. Rather than in identifying nearby systems and learning about their individual properties, the main value of the technique of gravitational microlensing is in obtaining the statistics of planetary populations within the Milky Way and beyond. Only the complementarity of different techniques currently employed promises to yield a complete picture of planet formation that has sufficient predictive power to let us understand how habitable worlds like ours evolve, and how abundant such systems are in the Universe. A cooperative three-…

Astrophysics (astro-ph)FOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysicsAstrophysics::Galaxy Astrophysics
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