2011A&A...529L...8K


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.25CET13:37:13

2011A&A...529L...8K - Astronomy and Astrophysics, volume 529, L8-8 (2011/5-1)

Amplitudes of solar-like oscillations: a new scaling relation.

KJELDSEN H. and BEDDING T.R.

Abstract (from CDS):

Solar-like oscillations are excited by near-surface convection and are being observed in growing numbers of stars using ground- and space-based telescopes. We have previously suggested an empirical scaling relation to predict their amplitudes. This relation has found widespread use but it predicts amplitudes in F-type stars that are higher than observed. Here we present a new scaling relation that is based on the postulate that the power in velocity fluctuations due to p-mode oscillations scales with stellar parameters in the same way as the power in velocity fluctuations due to granulation. The new relation includes a dependence on the damping rate via the mode lifetime and should be testable using observations from the CoRoT and Kepler missions. We also suggest scaling relations for the properties of the background power due to granulation and argue that both these and the amplitude relations should be applicable to red giant stars.

Abstract Copyright:

Journal keyword(s): asteroseismology - stars: oscillations - stars: general

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 535 0
2 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1076 1
3 HD 49933 ** 06 50 49.831 -00 32 27.18           F3V 322 1
4 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1748 0
5 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1119 0

    Equat.    Gal    SGal    Ecl

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2020.01.25-13:37:13

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