Stellar content, planetary nebulae, and globular clusters of [KKS2000]04 (NGC 1052-DF2)

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Ruiz Lara, T (Autor) Outra; Trujillo, I (Autor) Outra; Beasley, MA (Autor) Outra; Falcon Barroso, J (Autor) Outra; Vazdekis, A (Autor) Outra; Mercedes E Filho (Autor) FEUP; Monelli, M (Autor) Outra; Roman, J (Autor) Outra; Almeida, JS (Autor) Outra

Revista

Título: Monthly Notices of the Royal Astronomical Society

Vol. 486

Páginas: 5670-5678

ISSN: 0035-8711

Editora: Oxford University Press

Indexação

ISI Web of Knowledge - 18 Citações

Scopus - 18 Citações

Outras Informações

ID Authenticus: P-00Q-REC

DOI: 10.1093/mnras/stz1237

Abstract (EN): [KKS2000]04 (NGC 1052-DF2) has become a controversial and well -studied galaxy after the claims suggesting a lack of dark matter and the presence of an anomalously bright globular cluster (GC) system around it. A precise determination of its overall star formation history (SFII) and a better characterization of its GC or planetary nebulae (PNe) systems are crucial aspects to (i) understand its real nature, in particular placing it within the family of ultra diffuse galaxies and (ii) shed light on its possible formation, evolution, and survival in the absence of dark matter, With this purpose we expand on the knowledge of [KKS2000]04 from the analysis of:OSIRIS @GTC spectroscopic data, On the one hand, we claim the possible detection of two new PNe and confirm membership of 5 GCs. On the other hand, we find that the stars shaping [KKS2000]04 are intermediate -age to old (90 percent of its stellar mass older than 5 Gyr, average age of 8,7 + 0,7 Gyr) and metal -poor (NM] + 0.05), in general a.greement with previous results. We do not find any clear hints of significant changes in its stellar content with radius. In addition, the possibility of IKKS2000104 being a tidal dwarf galaxy with no dark matter is highly disfavoured.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9