ALMA survey of Orion planck galactic cold clumps (ALMASOP): evidence for a molecular jet launched at an unprecedented early phase of protostellar evolution
Author
dc.contributor.author
Dutta, Somnath
Author
dc.contributor.author
Lee, Chin-Fei
Author
dc.contributor.author
Hirano, Naomi
Author
dc.contributor.author
Liu, Tie
Author
dc.contributor.author
Johnstone, Doug
Author
dc.contributor.author
Liu, Sheng-Yuan
Author
dc.contributor.author
Tatematsu, Ken'ichi
Author
dc.contributor.author
Goldsmith, Paul F.
Author
dc.contributor.author
Sahu, Dipen
Author
dc.contributor.author
Evans, Neal J.
Author
dc.contributor.author
Sanhueza, Patricio
Author
dc.contributor.author
Kwon, Woojin
Author
dc.contributor.author
Qin, Sheng-Li
Author
dc.contributor.author
Samal, Manash Ranjan
Author
dc.contributor.author
Zhang, Qizhou
Author
dc.contributor.author
Kim, Kee-Tae
Author
dc.contributor.author
Shang, Hsien
Author
dc.contributor.author
Lee, Chang Won
Author
dc.contributor.author
Moraghan, Anthony
Author
dc.contributor.author
Jhan, Kai-Syun
Author
dc.contributor.author
Li, Shanghuo
Author
dc.contributor.author
Lee, Jeong-Eun
Author
dc.contributor.author
Traficante, Alessio
Author
dc.contributor.author
Juvela, Mika
Author
dc.contributor.author
Bronfman Aguiló, Leonardo Jaime
Author
dc.contributor.author
Eden, David
Author
dc.contributor.author
Soam, Archana
Author
dc.contributor.author
He, Jinhua
Author
dc.contributor.author
Liu, Hong-li
Author
dc.contributor.author
Kuan, Yi-Jehng
Author
dc.contributor.author
Pelkonen, Veli-Matti
Author
dc.contributor.author
Luo, Qiuyi
Author
dc.contributor.author
Yi, Hee-Weon
Author
dc.contributor.author
Hsu, Shih-Ying
Admission date
dc.date.accessioned
2023-09-22T14:08:25Z
Available date
dc.date.available
2023-09-22T14:08:25Z
Publication date
dc.date.issued
2022
Cita de ítem
dc.identifier.citation
The Astrophysical Journal, 931:130 (13pp), 2022
es_ES
Identifier
dc.identifier.other
10.3847/1538-4357/ac67a1
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/195800
Abstract
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.
es_ES
Patrocinador
dc.description.sponsorship
ALMA 2018.1.00302
Ministry of Science and Technology, Taiwan MoST: 107-2119-M-001-040-MY3
110-2112-M-001-021-MY3
Academia Sinica - Taiwan AS-IA-108-M01
MoST 109-2112-M-001-023
109-2112-M001-048
National Natural Science Foundation of China (NSFC) 12073061
12122307
Chinese Academy of Sciences 114231KYSB20200009
Shanghai Pujiang Program 20PJ1415500
China Manned Space Project CMS-CSST-2021-B06
National Aeronautics & Space Administration (NASA) 80NM0018D0004
National Research Foundation of Korea NRF2019R1A2C1010851
National Research Council of Canada
Natural Sciences and Engineering Research Council of Canada (NSERC)
National Natural Science Foundation of China (NSFC) 12033005
Ministry of Science and Technology, Taiwan 109-2112-M-001-028and 110-2112-M-001-019
18H01259
Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)
Japan Society for the Promotion of Science ACE210002
FB21000
PID2020-115892GB-I00
MCIN/AEI/10.13039/501100011033
es_ES
Lenguage
dc.language.iso
en
es_ES
Publisher
dc.publisher
IOP
es_ES
Type of license
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 United States
ALMA survey of Orion planck galactic cold clumps (ALMASOP): evidence for a molecular jet launched at an unprecedented early phase of protostellar evolution