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ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Evidence for a Molecular Jet Launched at an Unprecedented Early Phase of Protostellar Evolution
DC Field | Value | Language |
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dc.contributor.author | Dutta, Somnath | - |
dc.contributor.author | Lee, Chin-Fei | - |
dc.contributor.author | Hirano, Naomi | - |
dc.contributor.author | Liu, Tie | - |
dc.contributor.author | Johnstone, Doug | - |
dc.contributor.author | Liu, Sheng-Yuan | - |
dc.contributor.author | Tatematsu, Ken'ichi | - |
dc.contributor.author | Goldsmith, Paul F. | - |
dc.contributor.author | Sahu, Dipen | - |
dc.contributor.author | Evans, Neal J. | - |
dc.contributor.author | Sanhueza, Patricio | - |
dc.contributor.author | Kwon, Woojin | - |
dc.contributor.author | Qin, Sheng-Li | - |
dc.contributor.author | Samal, Manash Ranjan | - |
dc.contributor.author | Zhang, Qizhou | - |
dc.contributor.author | Kim, Kee-Tae | - |
dc.contributor.author | Shang, Hsien | - |
dc.contributor.author | Lee, Chang Won | - |
dc.contributor.author | Moraghan, Anthony | - |
dc.contributor.author | Jhan, Kai-Syun | - |
dc.contributor.author | Li, Shanghuo | - |
dc.contributor.author | Lee, Jeong-Eun | - |
dc.contributor.author | Traficante, Alessio | - |
dc.contributor.author | Juvela, Mika | - |
dc.contributor.author | Bronfman, Leonardo | - |
dc.contributor.author | Eden, David | - |
dc.contributor.author | Soam, Archana | - |
dc.contributor.author | He, Jinhua | - |
dc.contributor.author | Liu, Hong-li | - |
dc.contributor.author | Kuan, Yi-Jehng | - |
dc.contributor.author | Pelkonen, Veli-Matti | - |
dc.contributor.author | Luo, Qiuyi | - |
dc.contributor.author | Yi, Hee-Weon | - |
dc.contributor.author | Hsu, Shih-Ying | - |
dc.date.accessioned | 2022-10-05T04:25:10Z | - |
dc.date.available | 2022-10-05T04:25:10Z | - |
dc.date.created | 2022-06-15 | - |
dc.date.issued | 2022-06 | - |
dc.identifier.citation | Astrophysical Journal, Vol.931 No.2 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | https://hdl.handle.net/10371/185463 | - |
dc.description.abstract | Protostellar outflows and jets play a vital role in star formation as they carry away excess angular momentum from the inner disk surface, allowing the material to be transferred toward the central protostar. Theoretically, low-velocity and poorly collimated outflows appear from the beginning of the collapse at the first hydrostatic core (FHSC) stage. With growing protostellar core mass, high-density jets are launched, entraininf an outflow from the infalling envelope. Until now, molecular jets have been observed at high velocity (greater than or similar to 100 km s(-1)) in early Class 0 protostars. We, for the first time, detect a dense molecular jet in SiO emission with low velocity (similar to 4.2 km s(-1), deprojected similar to 24 km s(-1)) from source G208.89-20.04Walma (hereafter G208Walma) using ALMA Band 6 observations. This object has some characteristics of FHSCs, such as a small outflow/jet velocity, extended 1.3 mm continuum emission, and N2D+ line emission. Additional characteristics, however, are typical of early protostars: collimated outflow and SiO jet. The full extent of the outflow corresponds to a dynamical timescale of similar to 930(-100)(+200) yr. The spectral energy distribution also suggests a very young source having an upper limit of T-bol similar to 31 K and L-bol similar to 0.8 L-circle dot. We conclude that G208Walma is likely in the transition phase from FHSC to protostar, and the molecular jet has been launched within a few hundred years of initial collapse. Therefore, G208Walma may be the earliest object discovered in the protostellar phase with a molecular jet. | - |
dc.language | 영어 | - |
dc.publisher | University of Chicago Press | - |
dc.title | ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Evidence for a Molecular Jet Launched at an Unprecedented Early Phase of Protostellar Evolution | - |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ac67a1 | - |
dc.citation.journaltitle | Astrophysical Journal | - |
dc.identifier.wosid | 000804951000001 | - |
dc.identifier.scopusid | 2-s2.0-85131713176 | - |
dc.citation.number | 2 | - |
dc.citation.volume | 931 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Kwon, Woojin | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
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