11.6 Protoplanetary disks
... To become detectable gap has to cut out at least a decade of disk size. ...
... To become detectable gap has to cut out at least a decade of disk size. ...
protostars and pre-main-sequence evolution.key
... • A protostar is the object that forms in the center of a collapsing cloud, before it becomes (optically) visible. • A pre-main sequence star is optically visible and has no central hydrogen burning • As soon as hydrogen burning starts, the object is called a star (main sequence star). ...
... • A protostar is the object that forms in the center of a collapsing cloud, before it becomes (optically) visible. • A pre-main sequence star is optically visible and has no central hydrogen burning • As soon as hydrogen burning starts, the object is called a star (main sequence star). ...
21. Solar System Formation
... For this to happen, the ‘freefall’ time, tff, must be less than the ‘sound-crossing’ time, tsc. There is a minimum size (and mass) for clouds which can collapse. ...
... For this to happen, the ‘freefall’ time, tff, must be less than the ‘sound-crossing’ time, tsc. There is a minimum size (and mass) for clouds which can collapse. ...
Accretion models
... The subsequent evolution of the star-disk system will be controlled by the rate at which J is transported in the disk (mechanisms not well known). ...
... The subsequent evolution of the star-disk system will be controlled by the rate at which J is transported in the disk (mechanisms not well known). ...
Interferometric Doppler Imaging of Chemically Peculiar stars
... All the F stars can be resolved at 1 μm with baselines ≥ 100 m F stars are in the “sweet spot” for angular diameter and hence age measurement: they are bright, near to us, their evolutionary tracks are reliable, and they are still above ZAMS. ...
... All the F stars can be resolved at 1 μm with baselines ≥ 100 m F stars are in the “sweet spot” for angular diameter and hence age measurement: they are bright, near to us, their evolutionary tracks are reliable, and they are still above ZAMS. ...
