MOSTDetectsg‐Modes in the Late‐Type Be Star β Canis Minoris (B8 Ve) | Zendy

Hideyuki Saio | Zendy; C. Cameron | Zendy; R. Kuschnig | Zendy; G. A. H. Walker | Zendy; J. M. Matthews | Zendy; Jason F. Rowe | Zendy; U. Lee | Zendy; Daniel Huber | Zendy; W. W. Weiß | Zendy; D. B. Guenther | Zendy; A. F. J. Moffat | Zendy; S. M. Ruciński | Zendy; Dimitar Sasselov | Zendy

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MOSTDetectsg‐Modes in the Late‐Type Be Star β Canis Minoris (B8 Ve)

Author(s) -

Hideyuki Saio,

C. Cameron,

R. Kuschnig,

G. A. H. Walker,

J. M. Matthews,

Jason F. Rowe,

U. Lee,

Daniel Huber,

W. W. Weiß,

D. B. Guenther,

A. F. J. Moffat,

S. M. Ruciński,

Dimitar Sasselov

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/509315

Subject(s) - physics , astrophysics , stars , excited state , amplitude , star (game theory) , opacity , astronomy , optics , atomic physics

The Microvariability and Oscillations of stars (MOST) satellite has detectedlow-amplitude light variations ($\Delta m\sim$1 mmag) in the Be star $\beta$CMi (B8Ve). The observations lasted 41 days and the variations have typicalperiods $\sim 0.3$ days. We demonstrate that the dominant frequencies areconsistent with prograde high-order g-modes of $m=-1$ excited by the Fe-bump ofopacity in an intermediate-mass ($\approx 3.5 M_\odot$) star with a nearlycritical rotation period of 0.38 days. This is the first detection of nonradialg-mode pulsations in a Be star later than B6 leading to the possibility thatpulsations are excited in all classical Be stars.Comment: 17 pages, 6 figures; Astrophysical Journal part 1 in pres

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