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Projeto Observacional para 2017A - SO2017A-001

Autor: Ingrid Pelisoli
Instituição: Outros
e-mail: ingrid.pelisoli@gmail.com

Kepler de Souza Oliveira

Título: Photometry of Extremely-Low Mass White Dwarf Candidates

Resumo: White dwarfs with log g lower than 7.0 are called Extremely Low Mass white dwarfs (ELMs). They were first found as companions to pulsars, followed by companions to other white dwarfs and main sequence stars (The ELM Survey: 2010 to 2016), and can only be formed in interacting binaries in the age of the Universe. ELMs can present photometric variations due to pulsations and/or eclipses. Out of the 88 known ELMs, six are known eclipsing and six are known pulsators (Gianninas et al. 2015). Besides the ~1000s g-modes common to other classes of white dwarf pulsators, some also show ~100s p-mode pulsations. In the SDSS DR12 catalog, we found a few thousand stars with 5.0> 500km/s.