Where the stellar wind impinges the interstellar medium

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00640554" target="_blank" >RIV/67985815:_____/25:00640554 - isvavai.cz</a>
Result on the web
<a href="http://www.astronomiaargentina.org.ar/uploads/docs/baaa66.pdf" target="_blank" >http://www.astronomiaargentina.org.ar/uploads/docs/baaa66.pdf</a>
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Where the stellar wind impinges the interstellar medium
Original language description
Massive stars have strong radiation-driven winds, losing part of their mass along their evolution. A separatrix surface called 'astropause' is formed due to the encounter of the winds with the interstellar medium. The astropause separates the stellar wind region, the astrosphere, from the outer streaming interstellar medium. At the apex of the astropause, the stagnation point is located. At that point, the streaming velocity of both flows, namely the flow of the interstellar medium and the stellar wind flow, vanishes. The velocity field in the astropause region can be described by potential theory, while the well-known m-CAK theory can be used to model the radiation-driven wind, in the proximity of the star. In this work, we aim to describe the interaction between the stellar wind and their surrounding, by connecting the results of both theories. We propose a criterion to define the validity regions of both theories, and we found a relation between the stellar wind parameters (mass-loss rate and terminal velocity), the interstellar medium conditions, and the distance between the star and the stagnation point (called the stagnation distance).
Czech name
—
Czech description
—

Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)