Is LkH alpha 264 like a young, extremely active Sun?

• Tipo: Outra Publicação em Revista Científica Internacional
• Data: 1999

Autores

Costa, VM (Autor) Outra; Gameiro, JF (Autor) FCUP; Lago, MTVT (Autor) FCUP

Revista

Título: Monthly Notices of the Royal Astronomical Society

Vol. 307

Páginas: L23-L26

ISSN: 0035-8711

Editora: Oxford University Press

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 5 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-001-3N8

DOI: 10.1046/j.1365-8711.1999.02855.x

Abstract (EN): We combine calibrated International Ultraviolet Explorer (IUE) archive data and new low-resolution optical data for the T Tauri star LkH alpha 264 covering the region from 1200 to 7000 Angstrom. The UV continuum is well fitted by the combination of a blackbody at 4300 K plus hydrogenic free-free and free-bound emission from a dense plasma at 3.5 x 10(4) K plus the emission by a second blackbody. This last component is at T approximate to 8700 K and covers about 4 per cent of the stellar surface. We interpret this last component to be the result of emission from one or various hotspots. The interesting result is that this combined emission also fits the observed optical continuum well. We conclude that this star is an analogue of the Sun, however displaying a much higher level of activity.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4