Kippenhahn diagram

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A Kippenhahn diagram shows the evolution of a star's internal structure over time. It is named after the astrophysicist Rudolf Kippenhahn .

Simulation calculations of stars since the 1960s show the development of their internal structure in the course of the simulation as a function of their mass and chemical composition according to the Vogt-Russell theorem . In addition, the development in interacting binary stars can be influenced by the companion. The Kippenhahn diagram is used to show the change in the star structure over time. Time is plotted on the abscissa and mass is plotted along the ordinate in units of solar masses . Usually the total mass of the star or the mass that is within a certain physically interesting limit (e.g. a fixed fraction of the total radius or the radius that represents the limit of the convection zone ). Originally only the type of energy transport, which can take place through radiation or convection , was shown. Today the type of nuclear fusion such as hydrogen burning and / or the chemical composition is also included. In the Kippenhahn diagram, for example, the development of bowl burning in red giants can be shown in a clear form.

literature

  • TM Tauris, N. Langer, TJ Moriya, Ph. Podsiadlowski, S.-C. Yoon, SI Blinnikov: Ultra-stripped Type Ic supernovae from close binary evolution . In: The Astrophysical Journal Letters . tape 778 , no. 2 , November 8, 2013, p. L23 , doi : 10.1088 / 2041-8205 / 778/2 / L23 , arxiv : 1310.6356v1 .
  • P. Lazarus et al .: Timing of a Young Mildly Recycled Pulsar with a Massive White Dwarf Companion . In: Monthly Notices of the Royal Astronomical Society . tape 437 , no. 2 , November 20, 2013, p. 1485-1494 , doi : 10.1093 / mnras / stt1996 , arxiv : 1310.5857v1 .
  • Evert Glebbeek, Evghenii Gaburov, Simon Portegies Zwart, Onno R. Pols: Structure and evolution of high-mass stellar mergers . In: Monthly Notices of the Royal Astronomical Society . tape 434 , no. 4 , August 6, 2013, p. 3497-3510 , doi : 10.1093 / mnras / stt1268 , arxiv : 1307.2445v1 .
  • Warrick Ball: Stellar structure and evolution (lecture notes). (pdf) November 3, 2014 (English).;

Individual evidence

  1. ^ Warrick Ball: Stellar structure and evolution (lecture notes). (pdf) November 3, 2014, accessed January 30, 2018 (English).
  2. ↑ For examples, see e.g. B. Fig. 2.3 in Ball 2014, Fig. 3 in Tauris 2013 or Fig. 8 in Glebbeek 2013 in the cited literature.