THE TRUE ROTATIONAL PERIOD OF THE AP-STAR HD-193722=V-1584-CYG

Authors
HILDEBRANDT G SCHOLZ G LEHMANN H PANOV K
Citation
G. Hildebrandt et al., THE TRUE ROTATIONAL PERIOD OF THE AP-STAR HD-193722=V-1584-CYG, Astronomische Nachrichten, 316(1), 1995, pp. 9-16
Citations number
15
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomische Nachrichten → ACNP
ISSN journal
00046337
Volume
316
Issue
1
Year of publication
1995
Pages
9 - 16
Database
ISI
SICI code
0004-6337(1995)316:1<9:TTRPOT>2.0.ZU;2-#
Abstract
Photometric observations of the Ap star HD 193722 give unambiguous pro ofs for a rotational period of P=8.5297 days in contradiction to the e arlier found value of P=1.13316 days. Spectroscopic measurements yield a line width equivalent to the value v sin i=44.5 km/s. Both findings show convincingly that HD 193722 is an evolved Ap star with a positio n in the giant region of the HR diagram. This place falls into a domai n occupied by the hypothetic Maia sequence.