Concept information
Preferred term
star accretion
Definition(s)
- The process by which an object increases its mass under the influence of its gravitational attraction. Accretion plays a key role in a wide range of astrophysical phenomena. In particular stars result from the accretion of material by a protostar from a surrounding molecular cloud. The accumulation of mass on the protostar involves the formation of an accretion disk. Theoretical and observational investigations of protostars and newborn stars indicate the important role of magnetic fields in this process. They favor the magnetospheric accretion model for mass transfer from the circumstellar disk onto the newborn star. (An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri, https://dictionary.obspm.fr/index.php?formSearchTextfield=accretion&formSubmit=Search&showAll=1)
Broader concept(s)
Synonym(s)
- stellar accretion
- stellar mass accretion
In other languages
-
French
URI
http://data.loterre.fr/ark:/67375/MDL-X63CG8SM-P
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