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

• Type: Another Publication in an International Scientific Journal
• Date: 1999

Authors

Costa, VM (Author) Other; Gameiro, JF (Author) FCUP; Lago, MTVT (Author) FCUP

Journal

Title: Monthly Notices of the Royal Astronomical Society

Vol. 307

Pages: L23-L26

ISSN: 0035-8711

Publisher: Oxford University Press

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4