OPTICAL SPECTROSCOPY OF THE DUSTY K5-V STAR HD-98800

Authors
Citation
Fc. Fekel et Bw. Bopp, OPTICAL SPECTROSCOPY OF THE DUSTY K5-V STAR HD-98800, The Astrophysical journal, 419(2), 1993, pp. 120000089-120000092
Citations number
36
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
0004637X
Volume
419
Issue
2
Year of publication
1993
Part
2
Pages
120000089 - 120000092
Database
ISI
SICI code
0004-637X(1993)419:2<120000089:OSOTDK>2.0.ZU;2-V
Abstract
High-resolution CCD spectra of the red region of the dusty K5 V star H D 98800, which may contain a protoplanetary disk, have been obtained a t Kitt Peak National Observatory. The spectra verify the dwarf spectra l type and show rotationally broadened photospheric lines, Halpha emis sion, and a very strong Li i lambda6707 absorption line, all of which confirm the star as a very young object. The overall spectrum of HD 98 800 closely resembles that of the young, chromospherically active, sin gle BY Dra star HD 82558 (=LQ Hya). The measured Li I equivalent width of 0.39 angstrom implies an abundance log N(Li) = 2.2 and suggests an age < 10 Myr. HD 98800 should be photometrically variable with a prob able rotation period of 5-10 days. The high level of chromospheric act ivity suggests HD 98800 may be detectable as an X-ray and radio source .