2007ApJ...654..544S

Query : 2007ApJ...654..544S

2007ApJ...654..544S - Astrophys. J., 654, 544-550 (2007/January-1)

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. and SASSELOV D.

Abstract (from CDS):

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.

Abstract Copyright: ∼

Journal keyword(s): Stars: Early-Type - Stars: Emission-Line, Be - stars: individual (β Canis Minoris) - Stars: Oscillations - Stars: Rotation

Simbad objects: 6

Full paper

View the references in ADS

Number of rows : 6

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026
1	* mu. Pic	**	06 31 58.3101113280	-58 45 13.811376348		5.57	5.64			B9IVn	55
2	* bet CMi	Be*	07 27 09.0417373	+08 17 21.536745	2.52	2.80	2.89	2.90	2.96	B8Ve	400
3	* zet Crv	Be*	12 20 33.6419830656	-22 12 57.241705320	4.73	5.11	5.21			B8V	86
4	* mu. Cen	Be*	13 49 36.9886872492	-42 28 25.440271450	2.37	3.27	3.43	3.41	3.50	B2Vnpe	453
5	* zet Oph	Be*	16 37 09.5400587698	-10 34 01.509742704	1.73	2.58	2.56	2.46	2.50	O9.2IVnn	1908
6	HD 163868	Be*	17 59 56.4314226144	-33 24 29.980813608	6.69	7.311	7.354			B5Ve	72

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