气候变化领域集成服务门户(CCPortal): Windows through the dusty disks surrounding the youngest low-mass protostellar objects

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DOI	10.1126/science.288.5466.649
	Windows through the dusty disks surrounding the youngest low-mass protostellar objects
	Cernicharo J.; Noriega-Crespo A.; Cesarsky D.; Lefloch B.; González-Alfonso E.; Najarro F.; Dartois E.; Cabrit S.
发表日期	2000
ISSN	0036-8075
起始页码	649
结束页码	652
卷号	288 期号:5466
英文摘要	The formation and evolution of young low-mass stars are characterized by important processes of mass loss and accretion occurring in the innermost regions of their placentary circumstellar disks. Because of the large obscuration of these disks at optical and infrared wavelengths in the early protostellar stages (class 0 sources), they were previously detected only at radio wavelengths using interferometric techniques. We have detected with the Infrared Space Observatory the mid-infrared (mid-IR) emission associated with the class 0 protostar VLA1 in the HH1-HH2 region located in the Orion nebula. The emission arises in three wavelength windows (at 5.3, 6.6, and 7.5 micrometers) where the absorption due to ices and silicates has a local minimum that exposes the central part of the young protostellar system to mid-IR investigations. The mid-IR emission arises from a central source with a diameter of 4 astronomical units at an averaged temperature of ~700 K, deeply embedded in a dense region with a visual extinction of 80 to 100 magnitudes.
英文关键词	article; astronomy; cosmos; infrared radiation; interferometry; mass; priority journal; space; Astronomy; Carbon Dioxide; Ice; Methane; Methanol; Silicates; Spectrophotometry, Infrared; Temperature; Water; Helicobacter heilmannii type 1
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243258
作者单位	Consejo Sup. de Invest. Cientificas, Inst. de Estructura de la Materia, Departamento Fisica Molecular, Serrano 121, 28006 Madrid, Spain; Space Infrared Telescope Facil. Sci., California Institute of Technology, Pasadena, CA 91125, United States; Institut d'Astrophysique Spatiale, Bât. 121, Université de Paris XI, 94500 Orsay Cedex, France; Observatoire de Grenoble, Domaine Universitaire de Grenoble, 414 rue de la Piscine, 38406 St. Martin d'Hères, France; Inst. Radioastronomie Millimetrique, Domaine Universitaire de Grenoble, 300 rue de la Piscine, 38406 St. Martin d'Hères, France; Departament d'Etudes Matiere I., UMR 8540 du CNRS, Observatoire de Paris, 61 Av. de l'Observatoire, F-75014 Paris, France
推荐引用方式 GB/T 7714	Cernicharo J.,Noriega-Crespo A.,Cesarsky D.,et al. Windows through the dusty disks surrounding the youngest low-mass protostellar objects[J],2000,288(5466).
APA	Cernicharo J..,Noriega-Crespo A..,Cesarsky D..,Lefloch B..,González-Alfonso E..,...&Cabrit S..(2000).Windows through the dusty disks surrounding the youngest low-mass protostellar objects.Science,288(5466).
MLA	Cernicharo J.,et al."Windows through the dusty disks surrounding the youngest low-mass protostellar objects".Science 288.5466(2000).