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Oscillation spectra with regular patterns
Bill Chaplin, School of Physics & Astronomy University of Birmingham IAU Symposium 301, 2013 August 20
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Ah! signatures of terrestrial seismology
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Pulsations in the HR diagram
Aerts, Christensen-Dalsgaard & Kurtz (2009)
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CoRoT ground-based telescopes
asteroseismic solar-type & red-giant targets
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asteroseismic solar-type & red-giant targets
Kepler asteroseismic solar-type & red-giant targets
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CoRoT Non-radial oscillations in red giants
De Ridder et al. 2009, Nature 459, 398
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Asteroseismic KOI ensemble
High-quality solar-like oscillations spectra of Kepler Objects of Interest
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Helioseismology: Sun as a star
Detection of overtone spacing, low-degree p modes Courtesy T. Roca Cortés
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Solar-like oscillations in Boo
Equivalent width observations of Balmer lines Kjeldsen et al., 1995, AJ,109, 1313
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Kepler’s “best in class”
The A-component of the solar-type binary 16 Cyg
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Regularity in Scuti spectra?
Analysis of CoRoT observations of HD174936 Garcia Hernandez et al., 2009, A&A, 506, 79
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Regularity in Scuti spectra?
Analysis of CoRoT observations of HD174936 Garcia Hernandez et al., 2009, A&A, 506, 79
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Guilty as charged…
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Toward automated peak-bagging of Sun-like stars
Homogeneous analysis of 61 solar-type stars Appourchaux et al., 2012, A&A, 543, A54
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Modelling and fitting “background”
Instrumental, activity, granulation, shot noise CoRoT HD169392A Mathur et al., 2013, A&A, 549, 12
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Kepler’s “best in class”
The A-component of the solar-type binary 16 Cyg
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The prototypical “Bl**dy F star” HD49933
F-type star syndrome The prototypical “Bl**dy F star” HD49933 Frequency (Hz) Appourchaux et al., 2008, A&A, 488, 705 Benomar et al., 2009, A&A, 507, L13
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F-type star syndrome Bl**dy F stars F-type star HD49933
G-type star 16 Cyg A F-type star HD49933
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Bayesian vs. Frequentist Humour
Which one are you? Bayesian vs. Frequentist Humour … and the nights flew by…
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Acoustic glitches The Sun
Houdek & Gough MNRAS, 2007, 375, MNRAS, 2011, 418, 1217
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Acoustic glitches CoRoT Results Red giant HR 7349
Miglio et al., 2010, A&A, 520, L6 CoRoT Results The F-type star HD49933 Mazumdar et al., 2012, A&A, 540, A31
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Acoustic glitches Kepler results
Examples: three solar-type stars Mazumdar et al., 2013, ApJ, submitted
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Buoyancy glitches CoRoT results
B3V star HD 50320 Degroote et al., 2010, Nature, 464, 259
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Sequence of 1M stars Increasing radius main sequence main sequence
sub giant Increasing radius sub giant red giant
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Mixed modes and avoided crossings in sub-giants
Coupled oscillators KIC Deheuvels & Michel, 2011, A&A, 535, A91 See: Benomar et al., , ApJ, 745, L33
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Period spacings in red giants
Mosser et al., 2012, A&A, 540, 143
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Automated analysis of red-giant oscillation spectra
Frequency (Hz) Automated analysis of red-giant oscillation spectra 130 120 Stello et al., 2013, ApJ, 765, L41 Mosser et al., 2011, A&A, 525, L9 110 100 20 40 60 1/ mod P (Hz)
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g-mode period spacings sdB stars
Reed et al., 2011 MNRAS, 414, 2885
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Period spacings in red giants
inertia ratio Christensen-Dalsgaard, 2011, arXiv:
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PLATO
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End
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Automated analysis of red-giant oscillation spectra
Frequency (Hz) Stello et al., 2013, ApJ, 765, L41 Mosser et al., 2011, A&A, 525, L9 1/ mod P (Hz)
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Internal rotation of a subgiant
Core rotates five-times faster than surface Deheuvels et al., 2012, ApJ, 756, 19
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Kepler-50 and Kepler-65 Two stars with multiple small planets
Chaplin et al., 2013, ApJ, 766, 101
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Spin-orbit alignment Kepler 50 and 65: stars with multiple small planets Chaplin et al., 2013, ApJ, 766, 101
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