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Article: Near-infrared spectroscopy of proto-planetary nebulae

TitleNear-infrared spectroscopy of proto-planetary nebulae
Authors
KeywordsCircumstellar Matter
Infrared: Interstellar: Lines
Planetary Nebulae: General
Issue Date1994
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
The Astrophysical Journal, 1994, v. 420 n. 2, p. 783-796 How to Cite?
AbstractSixteen proto-planetary nebulae were observed with low-resolution infrared spectroscopy in the H and K bands, and four were observed in the L band. In the H band, most of the objects show hydrogen Brackett lines (from n = 10-4 to n = 20-4) in absorption. In the K band, absorption bands (Δv = 2) of CO were observed to as high as v = 6-4, and in three cases the CO bands are in emission. The CO spectrum of 22272 + 5435 was found to change from emission to absorption over a 3 month interval. The CO emission most likely arises from collisional excitation resulting from recent episodes of mass loss. One new object which possibly shows weak 3.3 μm emission was found.
Persistent Identifierhttp://hdl.handle.net/10722/179679
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266

 

DC FieldValueLanguage
dc.contributor.authorHrivnak, BJen_US
dc.contributor.authorKwok, Sen_US
dc.contributor.authorGeballe, TRen_US
dc.date.accessioned2012-12-19T10:02:47Z-
dc.date.available2012-12-19T10:02:47Z-
dc.date.issued1994en_US
dc.identifier.citationThe Astrophysical Journal, 1994, v. 420 n. 2, p. 783-796en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179679-
dc.description.abstractSixteen proto-planetary nebulae were observed with low-resolution infrared spectroscopy in the H and K bands, and four were observed in the L band. In the H band, most of the objects show hydrogen Brackett lines (from n = 10-4 to n = 20-4) in absorption. In the K band, absorption bands (Δv = 2) of CO were observed to as high as v = 6-4, and in three cases the CO bands are in emission. The CO spectrum of 22272 + 5435 was found to change from emission to absorption over a 3 month interval. The CO emission most likely arises from collisional excitation resulting from recent episodes of mass loss. One new object which possibly shows weak 3.3 μm emission was found.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637Xen_US
dc.relation.ispartofThe Astrophysical Journalen_US
dc.subjectCircumstellar Matteren_US
dc.subjectInfrared: Interstellar: Linesen_US
dc.subjectPlanetary Nebulae: Generalen_US
dc.titleNear-infrared spectroscopy of proto-planetary nebulaeen_US
dc.typeArticleen_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-12044255051en_US
dc.identifier.volume420en_US
dc.identifier.issue2en_US
dc.identifier.spage783en_US
dc.identifier.epage796en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHrivnak, BJ=35613962100en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US
dc.identifier.scopusauthoridGeballe, TR=7103289480en_US

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