منابع مشابه
Stellar Mass Dependent Disk Dispersal
We use published optical spectral and IR excess data from nine young clusters and associations to study the stellar mass dependent dispersal of circumstellar disks. All clusters older than ∼3Myr show a decrease in disk fraction with increasing stellar mass for Solar to higher mass stars. This result is significant at about the 1σ level in each cluster. For the complete set of clusters we reject...
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Microquasars provide new insights into: 1) the physics of relativistic jets from black holes, 2) the connection between accretion and ejection, and 3) the physical mechanisms in the formation of stellar-mass black holes. Furthermore, the studies of microquasars in our Galaxy can provide in the future new insights on: 1) a large fraction of the ultraluminous X-ray sources in nearby galaxies, 2) ...
متن کاملThe Galactic disk mass-budget : I. stellar mass-function and density
In this paper, we use the general theory worked out within the past few years for the structure and the evolution of low-mass stars to derive the stellar mass-function in the Galactic disk down to the vicinity of the hydrogen-burning limit, from the observed nearby luminosity functions. The accuracy of the mass-magnitude relationships derived from the afore-mentioned theory is examined by compa...
متن کاملDisk Dispersal around Young Stars
. o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o We review the evidence pertaining t the lifetimes f planet-f rming disks and discuss p ssible disk dispersal mechanisms: (1) visc us accreti n f material nt the central s urce, (2) cl se stellar enc unters, (3) stellar winds, and (4) ph t evap rati n by ultravi let radia...
متن کاملDisk Dispersal and Planet Formation Time Scales
Well before the existence of exo-solar systems was confirmed, it was accepted knowledge that most – if not all – stars possess circumstellar material during the first one-to-several million years of their pre-main sequence lives, and thus that they commonly have the potential to form planets. Here I summarize current understanding regarding the evolution of proto-planetary dust and gas disks, e...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/695/2/1210