Navegação Ciências Exatas e da Terra por Autor "Galarza, Jhon Joel Yana"

Resultados 1-3 de 3

    • The Li–age correlation: the Sun is unusually Li deficient for its age 

      Carlos, Marília Gabriela Cardoso Corrêa; Meléndez, Jorge; Spina, Lorenzo; Santos, Leonardo Augusto Gonçalves dos; Bedell, Megan; Ramírez, Iván; Asplund, Martin; Bean, Jacob L.; Yong, David; Galarza, Jhon Joel Yana; Alves-Brito, Alan (2019) [Artigo de periódico]
      This work aims to examine in detail the depletion of lithium in solar twins to better constrain stellar evolution models and investigate its possible connection with exoplanets. We employ spectral synthesis in the region ...

    • The solar twin planet search : V. close-in, low-mass planet candidates and evidence of planet accretion in the solar twin HIP 68468 

      Meléndez, Jorge; Bedell, Megan; Bean, Jacob L.; Ramírez, Iván; Asplund, Martin; Dreizler, Stefan; Yan, Hong Liang; Shi, Jianrong; Lind, Karin; Ferraz-Mello, Sylvio; Galarza, Jhon Joel Yana; Santos, Leonardo Augusto Gonçalves dos; Spina, Lorenzo; Maia, Marcelo Tucci; Alves-Brito, Alan; Monroe, TalaWanda Rose; Casagrande, Luca (2017) [Artigo de periódico]
      Context. More than two thousand exoplanets have been discovered to date. Of these, only a small fraction have been detected around solar twins, which are key stars because we can obtain accurate elemental abundances ...

    • Thorium in solar twins : implications for habitability in rocky planets 

      Botelho, Rafael Bueno; Milone, André de Castro; Meléndez, Jorge; Bedell, Megan; Spina, Lorenzo; Asplund, Martin; Santos, Leonardo Augusto Gonçalves dos; Bean, Jacob L.; Ramírez, Iván; Yong, David; Dreizler, Stefan; Alves-Brito, Alan; Galarza, Jhon Joel Yana (2019) [Artigo de periódico]
      We have investigated the thorium (Th) abundance in a sample of 53 thin disc solar twins covering a wide range of ages. These data provide constrains on the mantle energy budget of terrestrial planets that can be formed ...