THE OUTBURST OF THE T-TAURI STAR EX-LUPI IN 1994

Citation
T. Lehmann et al., THE OUTBURST OF THE T-TAURI STAR EX-LUPI IN 1994, Astronomy and astrophysics, 300(1), 1995, pp. 9-12
Citations number
22
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
300
Issue
1
Year of publication
1995
Pages
9 - 12
Database
ISI
SICI code
0004-6361(1995)300:1<9:TOOTTS>2.0.ZU;2-R
Abstract
We have observed an outburst of the T Tauri star EX Lup in March 1994. We present both photometric (BVR) and spectroscopic (low and medium r esolution) observations carried out during the decline after outburst. The star appears much bluer during outburst due to an increased emiss ion of a hot continuum. This is accompanied by a strong increase of th e veiling of photospheric lines. We observe inverse P Cygni profiles o f many emission lines over a large brightness range of EX Lup. We brie fly discuss these features towards the model of magnetospherically sup ported accretion of disk material.