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Article: Detection of HCO+ emission toward the planetary nebula K3-35

TitleDetection of HCO+ emission toward the planetary nebula K3-35
Authors
KeywordsCircumstellar Matter
Ism: Molecules
Planetary Nebulae: General
Radio Lines: Ism
Stars: Individual (K3-35)
Issue Date2007
PublisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/AJ/home.html
Citation
Astronomical Journal, 2007, v. 133 n. 2, p. 364-369 How to Cite?
AbstractWe report the detection, for the first time, of HCO+(J = 1 → 0) emission, as well as marginal CO(J = 1 → 0) emission, toward the planetary nebula (PN) K3-35 as a result of a molecular survey carried out toward this source. We also report new observations of the previously detected CO(J = 2 → 1) and water maser emission, as well as upper limits for the emission of the SiO, H13CO+, HNC, HCN, HC3OH, HC 5N, CS, HC3N, 13CO, CN, and NH3 molecules. From the ratio of CO(J = 2 → 1) to CO(J = 1 → 0) emission we have estimated the kinetic temperature of the molecular gas, obtaining a value of ≃20 K. Using this result we have estimated a molecular mass for the envelope of ≃0.017 M⊙ and an HCO+ abundance relative to H2 of 6 × 10-7, similar to the abundances found in other PNe.K3-35 is remarkable because it is one of the two PNe reported to exhibit water maser emission, which is present in the central region, as well as at a distance of ≃5000 AU from the center. The presence of molecular emission provides some clues that could help in understanding the persistence of water molecules in the envelope of K3-35. The HCO+ emission could be arising in dense molecular clumps, which may provide the shielding mechanism that protects water molecules in this source. © 2007. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/175055
ISSN
2015 Impact Factor: 4.617
2015 SCImago Journal Rankings: 3.069
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTafoya, Den_US
dc.contributor.authorGómez, Yen_US
dc.contributor.authorAnglada, Gen_US
dc.contributor.authorLoinard, Len_US
dc.contributor.authorTorrelles, JMen_US
dc.contributor.authorMiranda, LFen_US
dc.contributor.authorOsorio, Men_US
dc.contributor.authorFrancoHernández, Ren_US
dc.contributor.authorNyman, LAen_US
dc.contributor.authorNakashima, Jen_US
dc.contributor.authorDeguchi, Sen_US
dc.date.accessioned2012-11-26T08:49:00Z-
dc.date.available2012-11-26T08:49:00Z-
dc.date.issued2007en_US
dc.identifier.citationAstronomical Journal, 2007, v. 133 n. 2, p. 364-369en_US
dc.identifier.issn0004-6256en_US
dc.identifier.urihttp://hdl.handle.net/10722/175055-
dc.description.abstractWe report the detection, for the first time, of HCO+(J = 1 → 0) emission, as well as marginal CO(J = 1 → 0) emission, toward the planetary nebula (PN) K3-35 as a result of a molecular survey carried out toward this source. We also report new observations of the previously detected CO(J = 2 → 1) and water maser emission, as well as upper limits for the emission of the SiO, H13CO+, HNC, HCN, HC3OH, HC 5N, CS, HC3N, 13CO, CN, and NH3 molecules. From the ratio of CO(J = 2 → 1) to CO(J = 1 → 0) emission we have estimated the kinetic temperature of the molecular gas, obtaining a value of ≃20 K. Using this result we have estimated a molecular mass for the envelope of ≃0.017 M⊙ and an HCO+ abundance relative to H2 of 6 × 10-7, similar to the abundances found in other PNe.K3-35 is remarkable because it is one of the two PNe reported to exhibit water maser emission, which is present in the central region, as well as at a distance of ≃5000 AU from the center. The presence of molecular emission provides some clues that could help in understanding the persistence of water molecules in the envelope of K3-35. The HCO+ emission could be arising in dense molecular clumps, which may provide the shielding mechanism that protects water molecules in this source. © 2007. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.publisherUniversity of Chicago Press. The Journal's web site is located at http://www.journals.uchicago.edu/AJ/home.htmlen_US
dc.relation.ispartofAstronomical Journalen_US
dc.subjectCircumstellar Matteren_US
dc.subjectIsm: Moleculesen_US
dc.subjectPlanetary Nebulae: Generalen_US
dc.subjectRadio Lines: Ismen_US
dc.subjectStars: Individual (K3-35)en_US
dc.titleDetection of HCO+ emission toward the planetary nebula K3-35en_US
dc.typeArticleen_US
dc.identifier.emailNakashima, J: junichi@hku.hken_US
dc.identifier.authorityNakashima, J=rp00764en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1086/509776en_US
dc.identifier.scopuseid_2-s2.0-33847407965en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33847407965&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume133en_US
dc.identifier.issue2en_US
dc.identifier.spage364en_US
dc.identifier.epage369en_US
dc.identifier.isiWOS:000243730000002-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridTafoya, D=15521388000en_US
dc.identifier.scopusauthoridGómez, Y=7003912682en_US
dc.identifier.scopusauthoridAnglada, G=7003699718en_US
dc.identifier.scopusauthoridLoinard, L=6603796954en_US
dc.identifier.scopusauthoridTorrelles, JM=7005186449en_US
dc.identifier.scopusauthoridMiranda, LF=7101918957en_US
dc.identifier.scopusauthoridOsorio, M=7006394332en_US
dc.identifier.scopusauthoridFrancoHernández, R=15848564200en_US
dc.identifier.scopusauthoridNyman, LA=7006064444en_US
dc.identifier.scopusauthoridNakashima, J=35485342300en_US
dc.identifier.scopusauthoridDeguchi, S=7006314159en_US

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