File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: The spectra of IC 418 and IC 5117 from 1.5 to 1.75 microns

TitleThe spectra of IC 418 and IC 5117 from 1.5 to 1.75 microns
Authors
KeywordsInfrared: Interstellar: Continuum
Planetary Nebulae: Individual (Ic 418, Ic 5117)
Issue Date1992
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/0004-637X
Citation
The Astrophysical Journal, 1992, v. 385 n. 1, p. 255-264 How to Cite?
AbstractNear-infrared spectra of planetary nebulae IC 418 and IC 5117 in the wavelength range 1.5-1.75 μm observed with the United Kingdom Infrared Telescope (UKIRT) Cooled Grating Spectrometer (CGS2) are reported. More than 10 members of the Brackett line series are detected superposed on a strong continuum. Analysis of the spectra shows that the observed flux ratios of the Brackett lines are in good agreement with the recombination line theory after correction for extinction by the extinction law of Draine. A He I triplet line at 1.7 μm is identified in both nebulae. A Mg I line at 1.504 μm, and a few Si I lines are also seen in the spectra. After subtraction of the nebular and central star continua by modeling the spectral energy distributions, a near-infrared excess is revealed. After correction for contribution from line emission, this excess can be explained by a hot dust component. However, the steep slope of the H-band spectrum of IC 418 remains unexplained and could be due to an unknown broad feature.
Persistent Identifierhttp://hdl.handle.net/10722/179642
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266

 

DC FieldValueLanguage
dc.contributor.authorZhang, CYen_US
dc.contributor.authorKwok, Sen_US
dc.date.accessioned2012-12-19T10:02:13Z-
dc.date.available2012-12-19T10:02:13Z-
dc.date.issued1992en_US
dc.identifier.citationThe Astrophysical Journal, 1992, v. 385 n. 1, p. 255-264en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/179642-
dc.description.abstractNear-infrared spectra of planetary nebulae IC 418 and IC 5117 in the wavelength range 1.5-1.75 μm observed with the United Kingdom Infrared Telescope (UKIRT) Cooled Grating Spectrometer (CGS2) are reported. More than 10 members of the Brackett line series are detected superposed on a strong continuum. Analysis of the spectra shows that the observed flux ratios of the Brackett lines are in good agreement with the recombination line theory after correction for extinction by the extinction law of Draine. A He I triplet line at 1.7 μm is identified in both nebulae. A Mg I line at 1.504 μm, and a few Si I lines are also seen in the spectra. After subtraction of the nebular and central star continua by modeling the spectral energy distributions, a near-infrared excess is revealed. After correction for contribution from line emission, this excess can be explained by a hot dust component. However, the steep slope of the H-band spectrum of IC 418 remains unexplained and could be due to an unknown broad feature.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.subjectInfrared: Interstellar: Continuumen_US
dc.subjectPlanetary Nebulae: Individual (Ic 418, Ic 5117)en_US
dc.titleThe spectra of IC 418 and IC 5117 from 1.5 to 1.75 micronsen_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.doi10.1086/170933-
dc.identifier.scopuseid_2-s2.0-0007446029en_US
dc.identifier.volume385en_US
dc.identifier.issue1en_US
dc.identifier.spage255en_US
dc.identifier.epage264en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridZhang, CY=38260889100en_US
dc.identifier.scopusauthoridKwok, S=22980498300en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats