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Shenar, Tomer ; Wade, Gregg A. ; Marchant, Pablo ; Bagnulo, Stefano ; Bodensteiner, Julia ; Bowman, Dominic M. ; Gilkis, Avishai ; Langer, Norbert ; Nicolas-Chene, Andre ; Oskinova, Lidia ; Van Reeth, Timothy ; Sana, Hugues ; St-Louis, Nicole ; de Oliveira, Alexandre Soares ; Todt, Helge ; Toonen, Silvia

• Tipo de documento: Artigo Científico
• Fonte: Science; v. 381, n. 6659, p. 5-pg., 2023-08-18.

Resumo

Magnetars are highly magnetized neutron stars, the formation mechanism of which is unknown. Hot helium-rich stars with spectra dominated by emission lines are known as Wolf-Rayet stars. We observed the binary system HD 45166 using spectropolarimetry and reanalyzed its orbit using archival data. We found that the system contains a Wolf-Rayet star with a mass of 2 solar masses and a magnetic field of 43 kilogauss. Stellar evolution calculations indicate that this component will explode as a supernova, and that its magnetic field is strong enough for the supernova to leave a magnetar remnant. We propose that the magnetized Wolf-Rayet star formed by the merger of two lower-mass helium stars. (AU)

• Processo FAPESP: 03/12618-7 - Estrutura e evolução de estrelas V Sagittae, CBSS e objetos correlatos
• Beneficiário: Alexandre Soares de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Pesquisa