Most detects g-modes in the late-type Be star β canis minoris (B8 Ve)

H. Saio; C. Cameron; R. Kuschnig; G. A.H. Walker; J. M. Matthews; J. F. Rowe; U. Lee; D. Huber; W. W. Weiss; D. B. Guenther; A. F.J. Moffat; S. M. Rucinski; D. Sasselov

doi:10.1086/509315

Most detects g-modes in the late-type Be star β canis minoris (B8 Ve)

H. Saio, C. Cameron, R. Kuschnig, G. A.H. Walker, J. M. Matthews, J. F. Rowe, U. Lee, D. Huber, W. W. Weiss, D. B. Guenther, A. F.J. Moffat, S. M. Rucinski, D. Sasselov

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

The Microvariability and Oscillations of Stars (MOST) satellite has detected low-amplitude light variations (Δm ∼ 1 mmag) in the Be star β CMi (B8 Ve). The observations lasted 41 days and the variations have typical periods ∼0.3 days. We demonstrate that the dominant frequencies are consistent with prograde high-order g-modes of m = -1 excited by the Fe bump of opacity in an intermediate-mass (≈3.5 M_⊙) star with a nearly critical rotation period of 0.38 days. This is the first detection of nonradial g-mode pulsations in a Be star later than B6 leading to the possibility that pulsations are excited in all classical Be stars.

Original language	English
Pages (from-to)	544-550
Number of pages	7
Journal	Astrophysical Journal
Volume	654
Issue number	1 I
DOIs	https://doi.org/10.1086/509315
Publication status	Published - 2007 Jan 1
Externally published	Yes

Keywords

Stars: early-type
Stars: emission-line, Be
Stars: individual (β Canis Minoris)
Stars: oscillations
Stars: rotation

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1086/509315

Cite this

Most detects g-modes in the late-type Be star β canis minoris (B8 Ve). / Saio, H.; Cameron, C.; Kuschnig, R.; Walker, G. A.H.; Matthews, J. M.; Rowe, J. F.; Lee, U.; Huber, D.; Weiss, W. W.; Guenther, D. B.; Moffat, A. F.J.; Rucinski, S. M.; Sasselov, D.

In: Astrophysical Journal, Vol. 654, No. 1 I, 01.01.2007, p. 544-550.

Research output: Contribution to journal › Article › peer-review

@article{b9f1fb933b884dacbfc55853cb4175d5,

title = "Most detects g-modes in the late-type Be star β canis minoris (B8 Ve)",

abstract = "The Microvariability and Oscillations of Stars (MOST) satellite has detected low-amplitude light variations (Δm ∼ 1 mmag) in the Be star β CMi (B8 Ve). The observations lasted 41 days and the variations have typical periods ∼0.3 days. We demonstrate that the dominant frequencies are consistent with prograde high-order g-modes of m = -1 excited by the Fe bump of opacity in an intermediate-mass (≈3.5 M⊙) star with a nearly critical rotation period of 0.38 days. This is the first detection of nonradial g-mode pulsations in a Be star later than B6 leading to the possibility that pulsations are excited in all classical Be stars.",

keywords = "Stars: early-type, Stars: emission-line, Be, Stars: individual (β Canis Minoris), Stars: oscillations, Stars: rotation",

author = "H. Saio and C. Cameron and R. Kuschnig and Walker, {G. A.H.} and Matthews, {J. M.} and Rowe, {J. F.} and U. Lee and D. Huber and Weiss, {W. W.} and Guenther, {D. B.} and Moffat, {A. F.J.} and Rucinski, {S. M.} and D. Sasselov",

year = "2007",

month = jan,

day = "1",

doi = "10.1086/509315",

language = "English",

volume = "654",

pages = "544--550",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "1 I",

}

TY - JOUR

T1 - Most detects g-modes in the late-type Be star β canis minoris (B8 Ve)

AU - Saio, H.

AU - Cameron, C.

AU - Kuschnig, R.

AU - Walker, G. A.H.

AU - Matthews, J. M.

AU - Rowe, J. F.

AU - Lee, U.

AU - Huber, D.

AU - Weiss, W. W.

AU - Guenther, D. B.

AU - Moffat, A. F.J.

AU - Rucinski, S. M.

AU - Sasselov, D.

PY - 2007/1/1

Y1 - 2007/1/1

N2 - The Microvariability and Oscillations of Stars (MOST) satellite has detected low-amplitude light variations (Δm ∼ 1 mmag) in the Be star β CMi (B8 Ve). The observations lasted 41 days and the variations have typical periods ∼0.3 days. We demonstrate that the dominant frequencies are consistent with prograde high-order g-modes of m = -1 excited by the Fe bump of opacity in an intermediate-mass (≈3.5 M⊙) star with a nearly critical rotation period of 0.38 days. This is the first detection of nonradial g-mode pulsations in a Be star later than B6 leading to the possibility that pulsations are excited in all classical Be stars.

AB - The Microvariability and Oscillations of Stars (MOST) satellite has detected low-amplitude light variations (Δm ∼ 1 mmag) in the Be star β CMi (B8 Ve). The observations lasted 41 days and the variations have typical periods ∼0.3 days. We demonstrate that the dominant frequencies are consistent with prograde high-order g-modes of m = -1 excited by the Fe bump of opacity in an intermediate-mass (≈3.5 M⊙) star with a nearly critical rotation period of 0.38 days. This is the first detection of nonradial g-mode pulsations in a Be star later than B6 leading to the possibility that pulsations are excited in all classical Be stars.

KW - Stars: early-type

KW - Stars: emission-line, Be

KW - Stars: individual (β Canis Minoris)

KW - Stars: oscillations

KW - Stars: rotation

UR - http://www.scopus.com/inward/record.url?scp=33846502112&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846502112&partnerID=8YFLogxK

U2 - 10.1086/509315

DO - 10.1086/509315

M3 - Article

AN - SCOPUS:33846502112

VL - 654

SP - 544

EP - 550

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 I

ER -

Most detects g-modes in the late-type Be star β canis minoris (B8 Ve)

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this