Entropy Production of Stars

Entropy

Leonid M. Martyushev¹  Sergey N. Zubarev¹  Umberto Lucia² 

[1] Department of Technical Physics, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; E-Mail:;Department of Technical Physics, Ural Federal University, Mira St. 19, 620002 Ekaterinburg, Russia; E-Mail

关键词: non-equilibrium thermodynamics;    main-sequence stars;    giants;    supergiants;    stability;    metastability;    minimum and maximum entropy production;   

DOI  :  10.3390/e17063645

来源: mdpi

【 摘 要 】

The entropy production (inside the volume bounded by a photosphere) of main-sequence stars, subgiants, giants, and supergiants is calculated based on B–V photometry data. A non-linear inverse relationship of thermodynamic fluxes and forces as well as an almost constant specific (per volume) entropy production of main-sequence stars (for 95% of stars, this quantity lies within 0.5 to 2.2 of the corresponding solar magnitude) is found. The obtained results are discussed from the perspective of known extreme principles related to entropy production.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland