Mass loss in 2D rotating stellar models

Stellar yields in CNO from rotating stellar models

For 12 C and 16 O, rotating models predict in general enhanced yields. At high metallicity, the carbon and oxygen yields from the very high mass stars, which go through a WR phase, are little affected by rotation. For 14 N, rotation allows the production of important amounts of primary nitrogen in intermediate mass stars at very low metallicity. The process invoked for this production is differ...

Stellar Mass Loss-driven Wind Models of Elliptical Galaxies?

Recent claims in the literature (Bressan, Chiosi & Fagotto 1994) that the epoch describing the onset of galactic winds in spheroidal star systems has been severely overestimated in the past, due to the neglect of energy deposited in the interstellar medium from stellar winds, is evaluated in the light of a more conservative approach to mod-eling the input of thermal energy to the system from ma...

Rotating disks in high-mass young stellar objects

We report on the detection of four rotating massive disks in two regions of high-mass star formation. The disks are perpendicular to known bipolar outflows and turn out to be unstable but long lived. We infer that accretion onto the embedded (proto)stars must proceed through the disks with rates of∼10 M⊙ yr . Subject headings: Stars: formation – Radio lines: ISM – ISM: molecules – ISM: individu...

Conference Summary: Mass Loss from Stellar Clusters

Mass loss at the lowest stellar masses ⋆

We report the discovery of a jet in a [SII] image of Par-Lup3-4, a remarkable M5-type pre-main sequence object in the Lupus 3 star-forming cloud. The spectrum of this star is dominated by the emission lines commonly interpreted as tracers of accretion and outflows. Par-Lup3-4 is therefore at the very low-mass end of the exciting sources of jets. High resolution spectroscopy shows that the [SII]...