STRW local: Lunch Talks

Lunch Talks

Probing the atmospheres of exoplanets and brown dwarfs with near-IR polarimetry

Our understanding of exoplanet compositions and their implications for planet formation are closely linked to our understanding of the physical processes that govern exoplanet atmospheres. However, the atmospheric models that best fit the observed spectra tend to imply implausibly small radii -- such discrepancies may be due to a lack of detail in the models of exoplanet clouds, which generally do not include well-motivated grain size distributions, depth variations, and horizontal structures. Polarimetry is an untapped method for constraining both exoplanet and brown dwarf cloud models: scattering by aerosols in these objects' atmospheres induces polarization of their thermally emitted, near-infrared radiation. With the advent of high contrast spectro-polarimeters (e.g. GPI and SPHERE) and new instruments for large-scale brown dwarf polarimetric surveys (e.g. WIRC+POL), such detections may now become commonplace. In this talk, I will discuss the role of polarimetry in brown dwarf and exoplanet science as well as current and future polarimetric observing campaigns.

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Unless announced otherwise, the lunch talks start at 12:30 sharp. The approximate duration of the lunch talk is given above, and additional time will be given for questions and discussion following the presentation. Please make sure that you take ample time to pick up your lunch beforehand.

Information for Speakers and Hosts: Talks by internal speakers are limited to 20 minutes, with additional time for questions. Visiting speakers can have up to 30 minutes, with additional time for questions. Hosts are responsible for bringing the speaker to the correct room in ample time to set up laptops etc., and for ensuring the speaker also has time for lunch.


For questions and/or suggestions concerning the lunch talks, please contact Themiya Nanayakkara () or Alvaro Hacar ()).