Intermediate band photometry of the CP2-star HD 220825 (Kappa Psc)

Autor(en)

Franz Kerschbaum, Hans Michael Maitzen

Abstrakt

Differential photoelectric photometry in eight intermediate band filters including the Stromgren system is reported for the Strontium star HD 220825 which has been subject of controversial period determinations. The data lend support to a rotational period of P = 1.412 days, significantly larger than the old half-day period which is shown to be an adjacent alias. This way, the nearly pole-on aspect as well as the unusually low R sin i value of Kappa Piscium disappear. Variability of the Balmer lines is indicated by enhanced variation in broad width H-gamma and H-beta filters. The amplitudes of variation increase from 15 mmags in Stromgren-y to 35 mmags in Stromgren-u.

Organisation(en)

Institut für Astrophysik

Journal

Astronomy & Astrophysics

Band

246

Seiten

346 - 348

Anzahl der Seiten

3

ISSN

0004-6361

Publikationsdatum

06-1991

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/intermediate-band-photometry-of-the-cp2star-hd-220825-kappa-psc(901661d7-a070-4b7f-8fd9-7cfc9112f6fe).html