Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31459
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhang, Yichen | en_US |
dc.contributor.author | Tan, Jonathan C. | en_US |
dc.contributor.author | Sakai, Nami | en_US |
dc.contributor.author | Tanaka, Kei E. I. | en_US |
dc.contributor.author | De Buizer, James M. | en_US |
dc.contributor.author | Liu, Mengyao | en_US |
dc.contributor.author | BELTRAN SOROLLA, MARIA TERESA | en_US |
dc.contributor.author | Kratter, Kaitlin | en_US |
dc.contributor.author | Mardones, Diego | en_US |
dc.contributor.author | Garay, Guido | en_US |
dc.date.accessioned | 2022-02-24T13:06:22Z | - |
dc.date.available | 2022-02-24T13:06:22Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31459 | - |
dc.description.abstract | We report molecular line observations of the massive protostellar source G339.88-1.26 with the Atacama Large Millimeter/Submillimeter Array. The observations reveal a highly collimated SiO jet extending from the 1.3 mm continuum source, which connects to a slightly wider but still highly collimated CO outflow. Rotational features perpendicular to the outflow axis are detected in various molecular emissions, including SiO, SO<SUB>2</SUB>, H<SUB>2</SUB>S, CH<SUB>3</SUB>OH, and H<SUB>2</SUB>CO emissions. Based on their spatial distributions and kinematics, we find that they trace different parts of the envelope-disk system. The SiO emission traces the disk and inner envelope in addition to the jet. The CH<SUB>3</SUB>OH and H<SUB>2</SUB>CO emissions mostly trace the infalling-rotating envelope and are enhanced around the transition region between envelope and disk, i.e., the centrifugal barrier. The SO<SUB>2</SUB> and H<SUB>2</SUB>S emissions are enhanced around the centrifugal barrier and also trace the outer part of the disk. Envelope kinematics are consistent with rotating-infalling motion, while those of the disk are consistent with Keplerian rotation. The radius and velocity of the centrifugal barrier are estimated to be about 530 au and 6 {km} {{{s}}}<SUP>-1</SUP>, respectively, leading to a central mass of about 11 M <SUB>☉</SUB>, consistent with estimates based on spectral energy distribution fitting. These results indicate that an ordered transition from an infalling-rotating envelope to a Keplerian disk through a centrifugal barrier, accompanied by changes of types of molecular line emissions, is a valid description of this massive protostellar source. This implies that at least some massive stars form in a similar way to low-mass stars via core accretion. | en_US |
dc.language.iso | eng | en_US |
dc.title | An Ordered Envelope-Disk Transition in the Massive Protostellar Source G339.88-1.26 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ab0553 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/ab0553 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 873 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 73 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2019ApJ...873...73Z | en_US |
dc.description.apc | sì | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0003-3315-5626 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Zhang_2019_ApJ_873_73-compr.pdf | Pdf editoriale | 8.79 MB | Adobe PDF | View/Open |
Page view(s)
18
checked on May 10, 2024
Download(s)
6
checked on May 10, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.