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Oscillations and Spins of Stars and Life. Alexander Kosovichev Stanford University. My first meeting with Wojtek : European Study Conference Oscillations as a Probe of the Sun's Interior": Catania, 20-24 June 1983. Wojtek.

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oscillations and spins of stars and life

Oscillations and Spins of Stars and Life

Alexander Kosovichev

Stanford University

slide2
My first meeting with Wojtek: European Study Conference Oscillations as a Probe of the Sun's Interior": Catania, 20-24 June 1983

Wojtek

first meeting oscillations as a probe of the sun s interior catania 20 24 june 1983
First meeting: Oscillations as a Probe of the Sun's Interior": Catania, 20-24 June 1983
visit of centrum astronomiczne im miko aja kopernika camk in warsaw for 3 months in 1986
Visit of Centrum Astronomiczne im. Mikołaja Kopernika (CAMK) in Warsaw for 3 months in 1986
slide5
CAMK was established in 1973 on occasion of 500th anniversary of Nicolaus Copernicus, and opened in 1978
low frequency oscillations in slowly rotating stars
Low Frequency Oscillations in Slowly Rotating Stars
  • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part One - General Properties." ActaAstronomica37: 313.
  • Dziembowski, W., A. Kosovichev, and M. Kozlowski (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Two - Inertial Modes in the Solar Convective Envelope." ActaAstronomica37: 331.
  • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." ActaAstronomica37: 341.
low frequency oscillations in slowly rotating stars1
Low Frequency Oscillations in Slowly Rotating Stars
  • Dziembowski, W., A. Kosovichev, and M. Kozlowski (1987). Inertial Modes Trapped in the Solar Convective Envelope, Advances in Helio- and Asteroseismology, Proceedings of the Symposium held 17-11 July 1986, in Aarhus, Denmark. Edited by J. Christensen-Dalsgaard and S. Frandsen. IAU Symposium, No. 123. Dordrecht: D. Reidel Publishing Co., p.117, 1988
slide13
Low Frequency Oscillations in Slowly Rotating Stars: Proc. IAU Sym. 123 -shortest paper I ever published
slide14
Primary question: What happens to g-modes when their frequencies become comparable with stellar rotation rate?

?

W/2p

slide21

g-modes

radial wavenumber

inertial

modes

slide22

rotational splitting

r-mode

g-modes

l(l+1)/2m

radial wavenumber

inertial

modes

slide23

Calculations of the frequency spectra and

mode eigenfunctions showed that

the oscillation amplitude is concentrated at

high latitudes.

slide24

Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." ActaAstronomica37: 341.

low frequency oscillations in slowly rotating stars2
Low Frequency Oscillations in Slowly Rotating Stars
  • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part One - General Properties." ActaAstronomica37: 313.
  • Dziembowski, W., A. Kosovichev, and M. Kozlowski (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Two - Inertial Modes in the Solar Convective Envelope." ActaAstronomica37: 331.
  • Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." ActaAstronomica37: 341.
life twists
Life twists

IoA, Cambridge, 1990-94

SOHO, Stanford, 1994-2010

Solar Dynamic Observatory,

Stanford 2010 -

big bear solar observatory new solar telescope 1 6m clear aperture world largest solar telescope
Big Bear Solar ObservatoryNew Solar Telescope 1.6m clear aperture – world largest solar telescope
great wojtek s lessons
Great Wojtek’s lessons
  • Do not afraid solving difficult problems
  • Never try to solve problems that are too difficult
slide38

Santa Fe 2009

Thanks, Wojtek!