File:PMS evolution tracks-ru.svg

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English: Pre-main-sequence (PMS) evolutionary tracks.
These tracks show the relationship between luminosity and temperature holding for pre-main-sequence stars of different masses.

  • Each PMS track (blue lines) is labeled by the stellar mass in units of M☉ (the mass of the sun). The red curves intersecting the tracks are isochrones which give the age of an evolving star at the intersection and are labeled in years. As an example, stars 106 years old lie along the curve labeled 106.
  • The PMS tracks start at the stars birth depicted by the isochrone (which is the upper black line near the 105 yr isochrone) and end when the star is entering the zero age main sequence (ZAMS) (which is the lower black line near the 108 yr isochrone).
  • The nearly vertical parts of the tracks which exist for stars weighing up to three solar masses are called Hayashi tracks, whereas the horizontal parts connecting Hayashi tracks and the ZAMS are called Henyey tracks.
Русский: Эволюционные треки звёзд разной массы до прихода на главную последовательность (PMS).

Эти треки показывают связь между светимостью и температурой, на пути звезд к главной последовательности. К каждой линии PMS (синие кривые) звёздная масса в единицах масс Солнца. Кривые, пересекающие дорожки, представляют собой изохроны, которые указывают возраст развивающейся звезды на пересечении с изохроной и обозначены в годах. Например, звезды с возрастом 106 лет лежат вдоль кривой, обозначенной 106. Треки PMS начинаются при рождении звезды, изображенной изохроной t = 0 (которая является верхней черной линией около изохроны 105 лет), и заканчиваются, когда звезда входит в основную часть последовательности с нулевым возрастом (ZAMS) (нижняя черная кривая около изохроны 108 лет).

Почти вертикальные части треков, которые существуют для звезд массой до трех солнечных масс, называются треками Хаяши, горизонтальные части, соединяющие треки Хаяши и ZAMS, называются треками Хеньи.
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Source

Steven W. Stahler and Francesco Palla, "The Formation of Stars"; doi:10.1002/9783527618675.
Republished in:

Francesco Palla, 1961–2011: Fifty years of Hayashi tracks, AIP Conf. Proc. 1480, pp. 22-29; doi:10.1063/1.4754323. Vectorization by Patrick87
Author Д.Ильин: translation
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