Linked Life Data

15470420

Source:http://linkedlifedata.com/resource/pubmed/id/15470420

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7009
pubmed:dateCreated
2004-10-7
pubmed:abstractText
beta Pictoris (beta Pic) is a main-sequence star with an edge-on dust disk that might represent a state of the early Solar System. The dust does not seem to be a remnant from the original protoplanetary disk, but rather is thought to have been generated from large bodies like planetesimals and/or comets. The history and composition of the parent bodies can therefore be revealed by determining the spatial distribution, grain size, composition and crystallinity of the dust through high-resolution mid-infrared observations. Here we report that the sub-micrometre amorphous silicate grains around beta Pic have peaks in their distribution around 6, 16 and 30 au (1 au is the Sun-Earth distance), whereas the crystalline and micrometre-sized amorphous silicate grains are concentrated in the disk centre. As sub-micrometre grains are blown quickly out from the system by radiation pressure from the central star, the peaks indicate the locations of ongoing dust replenishment, which originates from ring-like distributions of planetesimals or 'planetesimal belts'.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Oct
pubmed:issn
1476-4687
pubmed:author
pubmed:issnType
Electronic
pubmed:day
7
pubmed:volume
431
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
660-3
pubmed:dateRevised
2005-1-24
pubmed:year
2004
pubmed:articleTitle
An early extrasolar planetary system revealed by planetesimal belts in beta Pictoris.
pubmed:affiliation
Center for Natural Sciences, College of Liberal Arts and Sciences, Kitasato University, 1-15-1 Kitazato, Sagamihara, Kanagawa 228-8555, Japan. okamtoys@cc.nao.ac.jp
pubmed:publicationType
Journal Article