Solar‐like Oscillations in α Centauri B
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- 20 December 2005
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 635 (2) , 1281-1290
- https://doi.org/10.1086/497530
Abstract
We have made velocity observations of the star alpha Cen B from two sites, allowing us to identify 37 oscillation modes with l=0-3. Fitting to these modes gives the large and small frequency separations as a function of frequency. The mode lifetime, as measured from the scatter of the oscillation frequencies about a smooth trend, is similar to that in the Sun. Limited observations of the star delta Pav show oscillations centred at 2.3 mHz with peak amplitudes close to solar. We introduce a new method of measuring oscillation amplitudes from heavily-smoothed power density spectra, from which we estimated amplitudes for alpha Cen A and B, beta Hyi, delta Pav and the Sun. We point out that the oscillation amplitudes may depend on which spectral lines are used for the velocity measurements.Comment: accepted for publication in ApKeywords
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This publication has 31 references indexed in Scilit:
- Inferred acoustic rates of solarp modes from several helioseismic instrumentsAstronomy & Astrophysics, 2005
- Oscillation Frequencies and Mode Lifetimes in α Centauri AThe Astrophysical Journal, 2004
- Ultra-High-Precision Velocity Measurements of Oscillations in Centauri AThe Astrophysical Journal, 2003
- The acoustic spectrum ofα Cen AAstronomy & Astrophysics, 2002
- P-mode observations on $\vec {\alpha}$ Cen AAstronomy & Astrophysics, 2001
- Evidence for Solar-like Oscillations in β HydriThe Astrophysical Journal, 2001
- Identification of Solar Acoustic Modes of Low Angular Degree and Low Radial OrderThe Astrophysical Journal, 2000
- Measuring stellar oscillations using equivalent widths of absorption linesMonthly Notices of the Royal Astronomical Society, 1996
- Attaining Doppler Precision of 3 M s-1Publications of the Astronomical Society of the Pacific, 1996
- Effluent stellar pulsationThe Astrophysical Journal, 1990