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Circumstellar disks and rings ‐ observational results
Author(s) -
Elsässer H.
Publication year - 1987
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113080502
Subject(s) - physics , circumstellar disk , astrophysics , stars , infrared , bipolar outflow , planetary nebula , astronomy , bipolar nebula , nebula , molecular cloud , circumstellar dust , wavelength , outflow , dark nebula , star formation , reflection nebula , interstellar cloud , optics , meteorology
Recent advances in the observation of star‐forming regions at visual, infrared and radio wavelengths have demonstrated that disks or rings of dust and molecules are suspected or even seen to exist around newly borne stars. They might be the prestage of a planetary system. Typical objects of this kind which are discussed in some detail are the bipolar nebula S 106 and the molecular cloud surrounding it as well as the CO outflow source in the dark cloud L 1551 with its central infrared star IRS 5.