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, June 1983 Wojtek

First meeting: Oscillations as a Probe of the Sun's Interior": Catania, June 1983

Visit of Centrum Astronomiczne im. Mikołaja Kopernika (CAMK) in Warsaw for 3 months in 1986

CAMK was established in 1973 on occasion of 500 th anniversary of Nicolaus Copernicus, and opened in 1978

Picture of youngest Wojtek (1973), I found on Internet

Computer equipment: PDP 11/45 IBM PC XTs brought to CAMK by Phil Goode

Warsaw in 1986

Living with shock therapy

CAMK was the best place to live and work

Low Frequency Oscillations in Slowly Rotating Stars Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part One - General Properties." Acta Astronomica 37: 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." Acta Astronomica 37: 331. Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." Acta Astronomica 37: 341.

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 July 1986, in Aarhus, Denmark. Edited by J. Christensen-Dalsgaard and S. Frandsen. IAU Symposium, No Dordrecht: D. Reidel Publishing Co., p.117, 1988

Low Frequency Oscillations in Slowly Rotating Stars: Proc. IAU Sym shortest paper I ever published

Primary question: What happens to g- modes when their frequencies become comparable with stellar rotation rate? ?  /2 

N 2 /  2 in Standard Solar Model S  2 > N 2

radial wavenumber g-modes inertial modes

radial wavenumber g-modes inertial modes r-mode rotational splitting l(l+1)/2m

Calculations of the frequency spectra and mode eigenfunctions showed that the oscillation amplitude is concentrated at high latitudes.

Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." Acta Astronomica 37: 341.

ADS read/citation statistics

LMXB: low-mass X-ray binaries

Low Frequency Oscillations in Slowly Rotating Stars Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part One - General Properties." Acta Astronomica 37: 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." Acta Astronomica 37: 331. Dziembowski, W. and A. Kosovichev (1987). "Low Frequency Oscillations in Slowly Rotating Stars - Part Three - Kelvin-Helmholtz Instability." Acta Astronomica 37: 341.

Inside the Sun, Versailles 1989

Life twists IoA, Cambridge, SOHO, Stanford, Solar Dynamic Observatory, Stanford

Big Bear Solar Observatory New Solar Telescope 1.6m clear aperture – world largest solar telescope

Great Wojtek’s lessons Do not afraid solving difficult problems Never try to solve problems that are too difficult

Santa Fe 2009 Thanks, Wojtek!