We study the close circumstellar environment of the nearby S-type star Pi^1 Gruis using high spatial-resolution, mid-infrared observations from the ESO/VLTI. Spectra and visibilities were obtained with the MIDI interferometer on the VLT Auxiliary Telescopes. The cool M5III giant Beta Gruis was used as bright primary calibrator, and a dedicated...
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May 2008 (v1)Journal articleUploaded on: December 4, 2022
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2009 (v1)Journal article
Aims: We present high spatial resolution observations in the mid-infrared of the dusty core of the binary system HR 4049. Methods: We used the mid-infrared interferometer MIDI/VLTI with 40 m projected baselines. These observations provided two spectrally dispersed visibility curves at a spatial resolution of ~10 mas. Acquisition images and...
Uploaded on: December 3, 2022 -
January 2010 (v1)Journal article
The problem of the stability of planetary systems, a question that concerns only multiplanetary systems that host at least two planets, is discussed. The problem of mean motion resonances is addressed prior to discussion of the dynamical structure of the more than 350 known planets. The difference with regard to our own Solar System with eight...
Uploaded on: December 4, 2022