منابع مشابه
Instability & Mass Loss near the Eddington Limit
We review the physics of continuum-driven mass loss and the role it plays in η Carinae and other LBVs. Unlike line-driven mass loss, which is inherently limited by self-shadowing, continuum driving can in principle lead to mass-loss rates up to the “photon-tiring” limit, for which the energy to lift the outflow becomes equal to the stellar luminosity. We discuss how luminous atmospheres give ri...
متن کاملLuminous Blue Variables & Mass Loss near the Eddington Limit
During the course of their evolution, massive stars lose a substantial fraction of their initial mass, both through steady winds and through relatively brief eruptions during their Luminous Blue Variable (LBV) phase. This talk reviews the dynamical driving of this mass loss, contrasting the line-driving of steady winds to the potential role of continuum driving for eruptions during LBV episodes...
متن کاملCygnus X - 2 , super - Eddington mass transfer
We consider the unusual evolutionary state of the secondary star in Cygnus X-2. Spectroscopic data give a low mass (M 2 ' 0:5 ? 0:7M) and yet a large radius (R 2 ' 7R) and high luminosity (L 2 ' 150L). We show that this star closely resembles a remnant of early massive Case B evolution, during which the neutron star ejected most of the 3M transferred from the donor (initial mass M 2i 3:6M) on i...
متن کاملSuperbursts at near-Eddington mass accretion rates
Models for superbursts from neutron stars involving carbon shell flashes predict that the mass accretion rate should be anywhere in excess of one tenth of the Eddington limit. Yet, superbursts have so far only been detected in systems for which the accretion rate is limited between 0.1 and 0.25 times that limit. The question arises whether this is a selection effect or an intrinsic property. Th...
متن کاملStrange stars and superbursts at near-Eddington mass accretion rates
Superbursts (SBs) were observed in systems for which accretion rate were derived to be between 0.1 to 0.25 times the Eddington limit. Recent careful assessment of four good SB candidates for GX 17+2 reveals that SB is possible even at near Eddington mass accretion rates. The scenario for SB in strange stars is that a micron-thick layer of diquarks, at the star surface, get broken due to repeate...
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ژورنال
عنوان ژورنال: Highlights of Astronomy
سال: 1983
ISSN: 1539-2996
DOI: 10.1017/s1539299600005554