2008A&A...478..497K

C.D.S. - SIMBAD4 rel 1.7 - 2021.04.21CEST15:07:53

2008A&A...478..497K - Astronomy and Astrophysics, volume 478, 497-505 (2008/2-1)

Nonradial p-modes in the G9.5 giant ε Ophiuchi? Pulsation model fits to MOST photometry.

KALLINGER T., GUENTHER D.B., MATTHEWS J.M., WEISS W.W., HUBER D., KUSCHNIG R., MOFFAT A.F.J., RUCINSKI S.M. and SASSELOV D.

Abstract (from CDS):

The G9.5 giant ε Oph shows evidence of radial p-mode pulsations in both radial velocity and luminosity. We re-examine the observed frequencies in the photometry and radial velocities and find a best model fit to 18 of the 21 most significant photometric frequencies. The observed frequencies are matched to both radial and nonradial modes in the best model fit. The small scatter of the frequencies about the model predicted frequencies indicate that the average lifetimes of the modes could be as long as 10-20d. The best fit model itself, constrained only by the observed frequencies, lies within ±1σ of ε Oph's position in the HR-diagram and the interferometrically determined radius.

Abstract Copyright: ∼

Journal keyword(s): stars: late-type - stars: oscillations - stars: fundamental parameters - stars: individual: ε Ophiuchi - techniques: photometric - techniques: radial velocities

Simbad objects: 6

Full paper

View the reference 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 - 2021	#notes
1	HD 20884	*	03 22 05.0767835572	+04 12 38.150018928		8.63	7.49			K0III	15	0
2	* alf UMa	SB*	11 03 43.67152	+61 45 03.7249	3.78	2.86	1.79	0.98	0.40	G9III+A7.5	425	0
3	* ksi Hya	**	11 33 00.1150559	-31 51 27.443449	5.17	4.47	3.54	2.84	2.36	G7IIIb	237	0
4	* alf Cen B	PM*	14 39 35.06311	-60 50 15.0992	2.89	2.21	1.33			K1V	921	1
5	HD 146490	*	16 16 48.2679625518	-05 29 48.450558897		7.43	7.20			A2/3V	15	0
6	* eps Oph	PM*	16 18 19.2897431	-04 41 33.034466	4.95	4.21	3.23	2.54	2.05	G9.5IIIbFe-0.5	227	0

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