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Towards characterization of M dwarfs with NIR spectroscopy

Daniel Thaagaard Andreasen

With more than 1700 confirmed exoplanets the hunt for an Earth twin is starting. The Earth's twin has about the same size as the Earth but it also has to be in the habitable zone, where the temperature allows liquid water to exist. In this hunt, precise characterization of the host star is extremely important in order to proper characterize the exoplanet. M dwarfs is ideal candidates for hosting an Earth twin, but characterization is extremely difficult for these stars.
In this talk I will present the basic ideas on how to characterize a star with spectroscopic data by measuring the equivalent width of FeI and FeII lines. I use the Sun as a model to create line lists in the near-IR. The composed line list will later be used for M dwarfs and other FGK stars as it has similar been done for the visual part of the spectrum before.

2014 May 07, 13:30

Centro de Astrofísica da Universidade do Porto (Classroom)
Rua das Estrelas, 4150-762 Porto

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