Browsing by Author "Maia, Marcelo Tucci"
Now showing items 1-4 of 4
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18 Sco : a solar twin rich in refractory and neutron-capture elements, implications for chemical tagging
Meléndez, Jorge; Ramírez, Iván; Karakas, Amanda I.; Yong, David; Monroe, TalaWanda Rose; Bedell, Megan; Bergemann, Maria; Asplund, Martin; Maia, Marcelo Tucci; Bean, Jacob L.; Nascimento Júnior, José Dias do; Bazot, Michael; Alves-Brito, Alan; Freitas, Fabrício Catani de; Castro, Matthieu Sébastien (2014) [Journal article]We study with unprecedented detail the chemical composition and stellar parameters of the solar twin 18 Sco in a strictly differential sense relative to the Sun. Our study is mainly based on high-resolution (R ∼ 110,000), ... -
The solar twin planet search I. Fundamental parameters of the stellar sample
Ramírez, Iván; Meléndez, Jorge; Bean, Jacob L.; Asplund, Martin; Bedell, Megan; Monroe, TalaWanda Rose; Casagrande, Luca; Schirbel, Lucas Alexandre; Dreizler, Stefan; Teske, Johanna K.; Maia, Marcelo Tucci; Alves-Brito, Alan; Baumann, P. (2014) [Journal article]Context. We are carrying out a search for planets around a sample of solar twin stars using the HARPS spectrograph. The goal of this project is to exploit the advantage offered by solar twins to obtain chemical abundances ... -
The solar twin planet search II. A Jupiter twin around a solar twin
Bedell, Megan; Meléndez, Jorge; Bean, Jacob L.; Ramírez, Iván; Asplund, Martin; Alves-Brito, Alan; Casagrande, Luca; Dreizler, Stefan; Monroe, TalaWanda Rose; Spina, Lorenzo; Maia, Marcelo Tucci (2015) [Journal article]Context. With high-precision radial velocity surveys reaching a su ciently long time baseline, the domain of long-period planet detections has recently opened up. The search for Jupiter-like planets is especially important ... -
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) [Journal article]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 ...