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Article: Near-infrared spectroscopy of proto-planetary nebulae
Title | Near-infrared spectroscopy of proto-planetary nebulae |
---|---|
Authors | |
Keywords | Circumstellar Matter Infrared: Interstellar: Lines Planetary Nebulae: General |
Issue Date | 1994 |
Publisher | Institute 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? |
Abstract | Sixteen 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 Identifier | http://hdl.handle.net/10722/179679 |
ISSN | 2023 Impact Factor: 4.8 2023 SCImago Journal Rankings: 1.905 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Hrivnak, BJ | en_US |
dc.contributor.author | Kwok, S | en_US |
dc.contributor.author | Geballe, TR | en_US |
dc.date.accessioned | 2012-12-19T10:02:47Z | - |
dc.date.available | 2012-12-19T10:02:47Z | - |
dc.date.issued | 1994 | en_US |
dc.identifier.citation | The Astrophysical Journal, 1994, v. 420 n. 2, p. 783-796 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/179679 | - |
dc.description.abstract | Sixteen 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.language | eng | en_US |
dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X | en_US |
dc.relation.ispartof | The Astrophysical Journal | en_US |
dc.subject | Circumstellar Matter | en_US |
dc.subject | Infrared: Interstellar: Lines | en_US |
dc.subject | Planetary Nebulae: General | en_US |
dc.title | Near-infrared spectroscopy of proto-planetary nebulae | en_US |
dc.type | Article | en_US |
dc.identifier.email | Kwok, S: deannote@hku.hk | en_US |
dc.identifier.authority | Kwok, S=rp00716 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.scopus | eid_2-s2.0-12044255051 | en_US |
dc.identifier.volume | 420 | en_US |
dc.identifier.issue | 2 | en_US |
dc.identifier.spage | 783 | en_US |
dc.identifier.epage | 796 | en_US |
dc.identifier.isi | WOS:A1994MQ44800029 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Hrivnak, BJ=35613962100 | en_US |
dc.identifier.scopusauthorid | Kwok, S=22980498300 | en_US |
dc.identifier.scopusauthorid | Geballe, TR=7103289480 | en_US |
dc.identifier.issnl | 0004-637X | - |