Zobrazeno 1 - 10
of 19
pro vyhledávání: '"M. Tucci Maia"'
The binary system 16 Cygni is key in studies of the planet-star chemical composition connection, as only one of the stars is known to host a planet. This allows us to better assess the possible influence of planet interactions on the chemical composi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc12461a263d721407f6c6c8652de59f
Autor:
Laia Casamiquela, Paula Jofre, Sergi Blanco-Cuaresma, M. Tucci Maia, Caroline Soubiran, Y. Tarricq, Ulrike Heiter
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 635, ⟨10.1051/0004-6361/201936978⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 635, ⟨10.1051/0004-6361/201936978⟩
Well studied Open Clusters (OCs) in the Solar neighbourhood are used as reference objects to test galactic and stellar theories. For that purpose their chemical composition needs to be known with a high level of confidence. The aims of this work are
Autor:
Matthieu Castro, M. Tucci Maia, Ivan Ramirez, Jorge Melendez, TalaWanda R. Monroe, J. D. do Nascimento, Martin Asplund, David Yong
Publikováno v:
Repositório Institucional da UFRN
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Context. Lithium and beryllium are destroyed at different temperatures in stellar interiors. As such, their relative abundances offer excellent probes of the nature and extent of mixing processes within and below the convection zone. Aims. We determi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b111726fd84ebd61d8b2c37c3efd8d53
http://arxiv.org/abs/1503.07882
http://arxiv.org/abs/1503.07882
Autor:
Jacob L. Bean, Johanna Teske, Jorge Melendez, Ivan Ramirez, Martin Asplund, Stefan Dreizler, Lucas Schirbel, M. Tucci Maia, P. Baumann, Luca Casagrande, Megan Bedell, Alan Alves-Brito, TalaWanda R. Monroe
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade de São Paulo (USP)
instacron:USP
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
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 of unmatched precision. This survey w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ffd2e22fb9f8196565a1a199fbfd3e6
Autor:
R. Sefako, Ivan Ramirez, William J. Schuster, F. van Wyk, Bruno Castilho, Raul Michel, Luca Casagrande, Jorge Melendez, M. Tucci Maia
Photometric data in the UBV(RI)c system have been acquired for 80 solar analog stars for which we have previously derived highly precise atmospheric parameters Teff, log g, and [Fe/H] using high resolution, high signal-to-noise ratio spectra. UBV and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be10bb7c770f74a9a93ae0317fe4c4c0
http://arxiv.org/abs/1204.0828
http://arxiv.org/abs/1204.0828
Autor:
TalaWanda R. Monroe, M. Tucci Maia, Luca Casagrande, Stefan Dreizler, Jorge Melendez, Alan Alves-Brito, Megan Bedell, Martin Asplund, Lorenzo Spina, Ivan Ramirez, Jacob L. Bean
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Through our HARPS radial velocity survey for planets around solar twin stars, we have identified a promising Jupiter twin candidate around the star HIP11915. We characterize this Keplerian signal and investigate its potential origins in stellar activ
Autor:
M. Tucci Maia, M. Castro, Jacob L. Bean, Jorge Melendez, J. D. do Nascimento, Amanda I. Karakas, A. Alves-Brito, I. Ramirez, Martin Asplund, David Yong, M. Bazot, TalaWanda R. Monroe, Megan Bedell, Fabrício C. Freitas, Maria Bergemann
Publikováno v:
NASA Astrophysics Data System
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
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) high S/N (800-1000) VLT UVES
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