2015
DOI: 10.1051/0004-6361/201425578
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Spectro-astrometry of LkCa 15 with X-Shooter: Searching for emission from LkCa 15b

Abstract: Planet formation is one explanation for the partial clearing of dust observed in the disks of some T Tauri stars. Indeed studies using state-of-the-art high angular resolution techniques have very recently begun to observe planetary companions in these so-called transitional disks. The goal of this work is to use spectra of the transitional disk object LkCa 15 obtained with X-Shooter on the Very Large Telescope to investigate the possibility of using spectro-astrometry to detect planetary companions to T Tauri… Show more

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Cited by 15 publications
(25 citation statements)
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“…On non-resolved sources the differential phase decreases like / eq λ/B . Like spectro-astrometry on single apertures (Whelan et al 2015) it yields the photocentre variation vector on source much smaller than the diffraction limit. This makes the differential phase optical interferometry measure with the highest "super-resolution" potential.…”
Section: Differential Phase Vectorial Photocentre Displacement and Cmentioning
confidence: 99%
“…On non-resolved sources the differential phase decreases like / eq λ/B . Like spectro-astrometry on single apertures (Whelan et al 2015) it yields the photocentre variation vector on source much smaller than the diffraction limit. This makes the differential phase optical interferometry measure with the highest "super-resolution" potential.…”
Section: Differential Phase Vectorial Photocentre Displacement and Cmentioning
confidence: 99%
“…Therefore, a great effort has been made to detect protoplanets still embedded in these disks (e.g. Huélamo et al 2011;Kraus & Ireland 2012;Quanz et al 2013;Biller et al 2014;Close et al 2014;Whelan et al 2015;Sallum et al 2015), since they can shed light on the planet formation mechanisms, the required physical conditions, and the physics of gas accretion to form the atmospheres of giant planets.…”
Section: Introductionmentioning
confidence: 99%
“…Spectro-astrometric signatures of accreting protoplanets should be detectable in optical and NIR emission lines (Hα, Brγ). NIR data, where the contrast with the star is lower, is very promising, athough X-shooter observations have not been successful so far (Whelan et al 2015). Similarly, detailed studies of accretion and activity can help to improve our knowledge of these processes, helping to distinguish their effects on radial-velocities and photometry from those of planetary companions (Sicilia-Aguilar et al 2015b).…”
Section: Discussion: Power and Limitations Of Multi-wavelength Observmentioning
confidence: 99%