Title: Discovery of gravity-mode pulsators among subdwarf B stars: PG 1716+426, the class prototype
Authors: Reed, MD ×
Green, EM
Callerame, K
Seitenzahl, IR
White, BA
Hyde, EA
Giovanni, MK
Ostensen, Roy
Bronowska, A
Jeffery, EJ
Cordes, O
Falter, S
Edelmann, H
Dreizler, S
Schuh, SL #
Issue Date: May-2004
Publisher: Univ chicago press
Series Title: Astrophysical journal vol:607 issue:1 pages:445-450
Abstract: A new class of pulsating subdwarf B stars has recently been announced by Green and coworkers. Here we present a follow-up paper describing our observations and the pulsation structure of the class prototype PG 1716+426. The oscillations are multiperiodic with periods between 0.8 and 1.4 hr (180-340 muHz) and semiamplitudes less than 0.2%. We also observe that the periods and amplitudes appear variable, making the pulsation structure of PG 1716 complicated. The periods are an order of magnitude longer than those seen in EC 14026 (sdBV) stars, implying that they are gravity modes rather than pressure modes. As such, they represent a new class of variable star.
ISSN: 0004-637X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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