Constraining the evolution of stellar rotation using solar twins

Autor(es)

Lorenzo-Oliveira, Diego ^[1] ; Melendez, Jorge ^[1] ; Galarza, Jhon Yana ^[1] ; Ponte, Geisa ^[2] ; dos Santos, Leonardo A. ^[3] ; Spina, Lorenzo ^[4] ; Bedell, Megan ^[5] ; Ramirez, Ivan ^[6] ; Bean, Jacob L. ^[7] ; Asplund, Martin ^[8]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, IAG, Dept Astron, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil

^[2] Univ Fed Rio de Janeiro, Observ Valongo, Ladeira do Pedro Antonio 43, BR-20080090 Rio De Janeiro, RJ - Brazil

^[3] Univ Geneva, Observ Astron, 51 Chemin Maillettes, CH-1290 Versoix - Switzerland

^[4] Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic 3800 - Australia

^[5] Flatiron Inst, Ctr Computat Astrophys, 162 5th Ave, New York, NY 10010 - USA

^[6] Tacoma Community Coll, 6501 South 19th St, Tacoma, WA 98466 - USA

^[7] Dept Astron & Astrophys, 5640 Ellis Ave, Chicago, IL 60637 - USA

^[8] Australian Natl Univ, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611 - Australia

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 485, n. 1, p. L68-L72, MAY 2019.
• Citações Web of Science: 1

Resumo

The stellar rotation versus age relation is commonly considered a useful tool to derive reliable ages for Sun-like stars. However, in the light of Kepler data, the presence of apparently old and fast rotators that do not obey the usual gyrochronology relations led to the hypothesis of weakened magnetic breaking in some stars. In this letter, we constrain the solar rotation evolutionary track using solar twins. Predicted rotational periods as a function of mass, age, {[}Fe/H], and given critical Rossby number (Ro(crit)) were estimated for the entire rotational sample. Our analysis favours the smooth rotational evolution scenario and suggests that if the magnetic weakened breaking scenario takes place at all, it should arise after Ro(crit) greater than or similar to 2.29 or ages greater than or similar to 5.3 Gyr (at 95 per cent confidence level). (AU)

• Processo FAPESP: 16/20667-8 - Cronômetros estelares: a conexão entre idade, atividade cromosférica, rotação e abundâncias de lítio em estrelas de tipo solar
• Beneficiário: Diego Lorenzo de Oliveira
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/04055-8 - Espectroscopia de alta precisão: das primeiras estrelas aos planetas
• Beneficiário: Jorge Luis Melendez Moreno
• Linha de fomento: Auxílio à Pesquisa - Temático