Analysis of accretion in young stellar objects of NGC 6530

• Autor(a) principal: Clara Oliveira Leal
• Data de Publicação: 2019
• Outros Autores: Silvia Helena Paixão Alencar, Alana Paixão de Sousa
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: http://hdl.handle.net/1843/56462; https://orcid.org/0000-0002-5171-8376; https://orcid.org/0000-0001-7397-8972
• topic: Accretion, accretion disks; Stars; Pre-main sequence - stars; Variables: T Tauri; Astrofísica; Acreção - Astrofísica; Estrelas - Formação; Estrelas variáveis; Nebulosas

Abstract. The Lagoon Nebula cataloged as M8 (NGC 6523) is a giant emission nebula located in the constellation of Sagittarius. Associated with the Lagoon nebula we have NGC 6530, a young open cluster (∼ 2 Myrs) that allows us to study how the star formation process occurs in a high mass environment. A selected sample of approximately 110 members of NGC 6530 ranging from spectral types K5 to B0 was observed by the VLT (ESO) with the FLAMES spectrograph. Our work consists in analyzing the profile of the Hα emission line from each of these observed objects. We removed the emission contribution of the nebula from the observed spectra, normalized and analyzed the emission of Hα by calculating the equivalent width and the width at 10% of maximum intensity. We present preliminary results obtained with a sample of 8 spectra, used to test the procedure of removing the nebular contribution that allows the classification of the system as accreting or non-accreting.