The super-Eddington nature of supermassive stars

Calanit Dotan, Nir J. Shaviv

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء


Supermassive stars (SMSs) are massive hydrogen objects that slowly radiate their gravitational binding energy. Such hypothetical primordial objects may have been the seed of the massive black holes (BHs) observed at the centre of galaxies. Under the standard picture, these objects can be approximately described as n = 3 polytropes, and they are expected to shine extremely close to their Eddington luminosity. Once however one considers the porosity induced by instabilities near the Eddington limit, which give rise to super-Eddington states, the standard picture should be modified. We study the structure, evolution and mass loss of these objects. We find the following. First, the evolution of SMSs is hastened due to their increased energy release. They accelerate continuum-driven winds. If there is no rotational stabilization, these winds are insufficient to evaporate the objects such that they can collapse to form supermassive BHs, however, they do prevent SMSs from emitting a copious amount of ionizing radiation. If the SMSs are rotationally stabilized, the winds evaporate the objects until a normal sub- Eddington star remains having a mass of a few × 100M⊙.

اللغة الأصليةإنجليزيّة أمريكيّة
الصفحات (من إلى)3071-3080
عدد الصفحات10
مستوى الصوت427
رقم الإصدار4
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 21 ديسمبر 2012

All Science Journal Classification (ASJC) codes

  • !!Astronomy and Astrophysics
  • !!Space and Planetary Science


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