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Article: A self-consistent photoionization-dust continuum-molecular line transfer model of NGC 7027

TitleA self-consistent photoionization-dust continuum-molecular line transfer model of NGC 7027
Authors
KeywordsDust, Extinction
Ism: Individual (Ngc 7027)
Ism: Molecules
Molecular Processes
Radiative Transfer
Issue Date1997
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
The Astrophysical Journal, 1997, v. 477 n. 2 pt. 1, p. 722-731 How to Cite?
AbstractA model to simulate the entire spectrum (1000 Å to 1 cm) of the high-excitation young planetary nebula NGC 7027 is presented. The ionized, dust, and molecular components of the object are modeled using geometric parameters obtained from visible, radio, infrared, and CO data. The physical processes considered include recombination lines of H and He, collisional excited lines of metals, bf and ff continuum radiations, two-photon radiation, dust continuum radiation, and molecular rotational and vibrational transitions. The dust component is assumed to be heated by a combination of direct starlight and the line and continuum radiation from the ionized nebula. The molecular component of the nebula is coupled to the dust component through the stimulated absorption of the dust continuum radiation. Specifically, we compare the predicted fluxes of the CO rotational lines and the 179.5 μm water rotational line to those observed by the Infrared Space Observatory satellite. From the observed ratio of these lines, we derived a gas phase water-to-H 2 abundance ratio of 3.2 × 10 -7 assuming that the water is uniformly mixed with the CO. © 1997. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/179686
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorVolk, Ken_US
dc.contributor.authorKwok, Sen_US
dc.date.accessioned2012-12-19T10:02:50Z-
dc.date.available2012-12-19T10:02:50Z-
dc.date.issued1997en_US
dc.identifier.citationThe Astrophysical Journal, 1997, v. 477 n. 2 pt. 1, p. 722-731en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179686-
dc.description.abstractA model to simulate the entire spectrum (1000 Å to 1 cm) of the high-excitation young planetary nebula NGC 7027 is presented. The ionized, dust, and molecular components of the object are modeled using geometric parameters obtained from visible, radio, infrared, and CO data. The physical processes considered include recombination lines of H and He, collisional excited lines of metals, bf and ff continuum radiations, two-photon radiation, dust continuum radiation, and molecular rotational and vibrational transitions. The dust component is assumed to be heated by a combination of direct starlight and the line and continuum radiation from the ionized nebula. The molecular component of the nebula is coupled to the dust component through the stimulated absorption of the dust continuum radiation. Specifically, we compare the predicted fluxes of the CO rotational lines and the 179.5 μm water rotational line to those observed by the Infrared Space Observatory satellite. From the observed ratio of these lines, we derived a gas phase water-to-H 2 abundance ratio of 3.2 × 10 -7 assuming that the water is uniformly mixed with the CO. © 1997. The American Astronomical Society. All rights reserved.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.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectDust, Extinctionen_US
dc.subjectIsm: Individual (Ngc 7027)en_US
dc.subjectIsm: Moleculesen_US
dc.subjectMolecular Processesen_US
dc.subjectRadiative Transferen_US
dc.titleA self-consistent photoionization-dust continuum-molecular line transfer model of NGC 7027en_US
dc.typeArticleen_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1086/303734en_US
dc.identifier.scopuseid_2-s2.0-21744435345en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-21744435345&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume477en_US
dc.identifier.issue2 pt. 1en_US
dc.identifier.spage722en_US
dc.identifier.epage731en_US
dc.identifier.isiWOS:A1997WM09000018-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridVolk, K=7006571965en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US

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