Publikationsdatum:
2010-10-12
Beschreibung:
Cold molecular clouds are the birthplaces of stars and planets, where dense cores of gas collapse to form protostars. The dust mixed in these clouds is thought to be made of grains of an average size of 0.1 micrometer. We report the widespread detection of the coreshine effect as a direct sign of the existence of grown, micrometer-sized dust grains. This effect is seen in half of the cores we have analyzed in our survey, spanning all Galactic longitudes, and is dominated by changes in the internal properties and local environment of the cores, implying that the coreshine effect can be used to constrain fundamental core properties such as the three-dimensional density structure and ages and also the grain characteristics themselves.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pagani, Laurent -- Steinacker, Jurgen -- Bacmann, Aurore -- Stutz, Amelia -- Henning, Thomas -- New York, N.Y. -- Science. 2010 Sep 24;329(5999):1622-4. doi: 10.1126/science.1193211.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire d'Etude du Rayonnement et de la Matiere en Astrophysique (LERMA) and UMR 8112 du CNRS, Observatoire de Paris, 61 Avenue de l'Observatoire, 75014 Paris, France. laurent.pagani@obspm.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929841" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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