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dc.contributor.authorBergner, Jennifer
dc.contributor.authorOberg, Karin
dc.contributor.authorGarrod, Robin
dc.contributor.authorGraninger, Dawn
dc.date.accessioned2019-10-29T13:45:42Z
dc.date.issued2017-06-02
dc.identifier.citationBergner, Jennifer B., Karin I. Öberg, Robin T. Garrod, and Dawn M. Graninger. 2017. Complex Organic Molecules toward Embedded Low-mass Protostars. The Astrophysical Journal 841, no. 2: 120.en_US
dc.identifier.issn1538-4357en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41668567*
dc.description.abstractComplex organic molecules (COMs) have been observed toward several low-mass young stellar objects (LYSOs). Small and heterogeneous samples have so far precluded conclusions on typical COM abundances, as well as the origin(s) of abundance variations between sources. We present observations toward 16 deeply embedded (Class 0/I) low-mass protostars using the IRAM 30 m telescope. We detect CH 2 CO, CH 3 CHO, CH 3 OCH 3 , CH 3 OCHO, CH 3 CN, HNCO, and HC 3 N toward 67%, 37%, 13%, 13%, 44%, 81%, and 75% of sources, respectively. Median column densities derived using survival analysis range between 6.0 × 10 10 cm −2 (CH 3 CN) and 2.4 × 10 12 cm −2 (CH 3 OCH 3 ), and median abundances range between 0.48% (CH 3 CN) and 16% (HNCO) with respect to CH 3 OH. Column densities for each molecule vary by about one order of magnitude across the sample. Abundances with respect to CH 3 OH are more narrowly distributed, especially for oxygen-bearing species. We compare observed median abundances with a chemical model for low-mass protostars and find fair agreement, although some modeling work remains to bring abundances higher with respect to CH 3 OH. Median abundances with respect to CH 3 OH in LYSOs are also found to be generally comparable to observed abundances in hot cores, hot corinos, and massive YSOs. Compared with comets, our sample is comparable for all molecules except HC 3 N and CH 2 CO, which likely become depleted at later evolutionary stages.en_US
dc.description.sponsorshipAstronomyen_US
dc.language.isoen_USen_US
dc.publisherAmerican Astronomical Societyen_US
dc.relation.hasversionhttps://arxiv.org/abs/1705.05338en_US
dash.licenseOAP
dc.subjectSpace and Planetary Scienceen_US
dc.subjectAstronomy and Astrophysicsen_US
dc.titleComplex Organic Molecules toward Embedded Low-mass Protostarsen_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalThe Astrophysical Journalen_US
dash.depositing.authorOberg, Karin
dc.date.available2019-10-29T13:45:42Z
dash.workflow.commentsFAR2017en_US
dash.funder.nameNational Science Foundationen_US
dash.funder.awardDGE1144152en_US
dc.identifier.doi10.3847/1538-4357/aa72f6
dc.source.journalApJ
dash.source.volume841;2
dash.source.page120
dash.contributor.affiliatedBergner, Jennifer
dash.contributor.affiliatedOberg, Karin


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