PULSATION MODE SWITCHING IN THE SMALL-AMPLITUDE RED VARIABLE W-BOOTIS

Authors
PERCY JR DESJARDINS A
Citation
Jr. Percy et A. Desjardins, PULSATION MODE SWITCHING IN THE SMALL-AMPLITUDE RED VARIABLE W-BOOTIS, Publications of the Astronomical Society of the Pacific, 108(728), 1996, pp. 847-850
Citations number
29
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
108
Issue
728
Year of publication
1996
Pages
847 - 850
Database
ISI
SICI code
0004-6280(1996)108:728<847:PMSITS>2.0.ZU;2-P
Abstract
W Bootis, a small-amplitude (0.2 mag in V) red variable, pulsated with a period of 25 days from 1966 (or earlier) until 1990. From 1991 to 1 994, its period was about 50 days, except in 1993 when its period was about 35 days superimposed on a long-term (>200 days) variation. There was no evidence for the 25-day period after 1990. The most likely exp lanation is that the pulsation mode changed, possibly from fourth to s econd overtone.