WHOLE EARTH TELESCOPE OBSERVATIONS OF THE DAV WHITE-DWARF G226-29

Authors
KEPLER SO GIOVANNINI O WOOD MA NATHER RE WINGET DE KANAAN A KLEINMAN SJ BRADLEY PA PROVENCAL JL CLEMENS JC CLAVER CF WATSON TK YANAGIDA K KRISCIUNAS K MARAR TMK SEETHA S ASHOKA BN LEIBOWITZ E MENDELSON H MAZEH T MOSKALIK P KRZESINSKI J PAJDOSZ G ZOLA S SOLHEIM JE EMANUELSEN PI DOLEZ N VAUCLAIR G CHEVRETON M FREMY JR BARSTOW MA SANSOM AE TWEEDY RW WICKRAMASINGHE DT FERRARIO L SULLIVAN DJ VANDERPEET AJ BUCKLEY DAH CHEN AL
Citation
So. Kepler et al., WHOLE EARTH TELESCOPE OBSERVATIONS OF THE DAV WHITE-DWARF G226-29, The Astrophysical journal, 447(2), 1995, pp. 874-879
Citations number
30
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal → ACNP
ISSN journal
0004637X
Volume
447
Issue
2
Year of publication
1995
Part
1
Pages
874 - 879
Database
ISI
SICI code
0004-637X(1995)447:2<874:WETOOT>2.0.ZU;2-Z
Abstract
We observed G226-29 for 121 hr in 1992 February and confirm the presen ce of the three previously identified frequencies close to 109 s. We f ind no evidence of other pulsation periods down to our noise level of about 0.35 millimodulation amplitudes. The presence of only one triple t pulsation mode in G226-29 and its effective temperature near the blu e edge of the instability strip identify the observed triplet of modes near 109 s as rotationally split components of the k = 1, I = 1 mode. With the mode identification, we derived a rotation period of 8.9 hr and an inclination of the pulsation axis of 70 degrees-75 degrees to o ur line of sight.