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Gas in the inner cavities of transition disks & recent news of the near-IR planet-hunter SPIRou at the Canada France Hawaii- Telescope

Andrés Carmona Gonzalez
Institut de Recherche en Astrophysique et en Planétologie (IRAP), Toulouse, France

Transition disks are protoplanetary disks with cavities in their dust distribution. The origin of those cavities is matter of intense debate. Are there really the signature of planets embedded in the disk? or are they the results of other mechanisms such as disk photo evaporation or hydrodynamical instabilities? One important aspect to help us to solve this question is to determine the content and distribution of gas inside the dust cavities and gaps. Are they cavities in the gas as observed in the dust ? Is the gas content consistent with the accretion rates measured in transition disks? are they signatures of planets in the gas distribution? In this talk, I will present the results of a program aimed to map the content of warm gas in the inner parts of transition disks using high resolution spectra of CO at 4.7 micron obtained with the instrument CRIRES at the VLT.

For concluding the seminar, I will briefly present SPIRou, the new high-resolution near-IR spectrometer and polarimeter at the Canada France-Hawaii Telescope that entered operations in February 2019. I will describe the capabilities of the instrument the science questions that it will address.

2019 March 21, 15:00

Observatório Astronómico de Lisboa (Seminar room)
Tapada da Ajuda, 1349-018 Lisboa

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia