NAOC Open IR
Multiple Outflows in the High-mass Cluster-forming Region G25.82-0.17
Kim, Jungha1,2; Kim, Mi Kyoung3,4; Hirota, Tomoya1,2; Kim, Kee-Tae5,6; Sugiyama, Koichiro2,7; Honma, Mareki1,3; Byun, Do-young5,6; Oh, Chungsik5; Motogi, Kazuhito8; Kang, Jihyun5; Kim, Jeongsook5; Liu, Tie9; Hu, Bo10; Burns, Ross A.2,5; Chibueze, James O.11,12; Matsumoto, Naoko2,13; Sunada, Kazuyoshi3
2020-06-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume896Issue:2Pages:10
AbstractWe present results of continuum and spectral line observations with Atacama Large Millimeter/submillimeter Array (ALMA) and 22 GHz water (H2O) maser observations using the KVN (Korean VLBI Network) and VERA (VLBI Exploration of Radio Astrometry) array (KaVA) toward a high-mass star-forming region, G25.82-0.17. Multiple 1.3 mm continuum sources are revealed, indicating the presence of young stellar objects (YSOs) at different evolutionary stages, namely an ultracompact Hiiregion, G25.82-E, a high-mass young stellar object (HM-YSO), G25.82-W1, and starless cores, G25.82-W2 and G25.82-W3. Two SiO outflows, at N-S and SE-NW orientations, are identified. The CH3OH 8(-1)-7(0)E line, known to be a Class I CH3OH maser at 229 GHz, is also detected, showing a mixture of thermal and maser emission. Moreover, the H2O masers are distributed in a region similar to 025 shifted from G25.82-W1. The CH3OH 22(4)-21(5)E line shows a compact ringlike structure at the position of G25.82-W1 with a velocity gradient, indicating a rotating disk or envelope. Assuming Keplerian rotation, the dynamical mass of G25.82-W1 is estimated to be >25Mand the total mass of 20-84Mis derived from the 1.3 mm continuum emission. The driving source of the N-S SiO outflow is G25.82-W1 while that of the SE-NW SiO outflow is uncertain. Detection of multiple high-mass starless/protostellar cores and candidates without low-mass cores implies that HM-YSOs could form in individual high-mass cores as predicted by the turbulent core accretion model. If this is the case, the high-mass star formation process in G25.82 would be consistent with a scaled-up version of low-mass star formation.
KeywordStar formation Star-forming regions Circumstellar disks Stellar jets Astrophysical masers Protostars Young massive clusters Young stellar objects Very long baseline interferometry Radio interferometry
Funding OrganizationMEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association ; MEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association ; MEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association ; MEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association
DOI10.3847/1538-4357/ab9100
WOS Keyword6.7-GHZ METHANOL MASERS ; RADIATION PRESSURE ; H2O ; SUBMILLIMETER ; MILLIMETER ; STARS
Language英语
Funding ProjectMEXT/JSPS KAKENHI[17K05398] ; EACOA Fellowship from the East Asian Core Observatories Association
Funding OrganizationMEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association ; MEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association ; MEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association ; MEXT/JSPS KAKENHI ; MEXT/JSPS KAKENHI ; EACOA Fellowship from the East Asian Core Observatories Association ; EACOA Fellowship from the East Asian Core Observatories Association
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000543309300001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82990
Collection中国科学院国家天文台
Corresponding AuthorKim, Jungha
Affiliation1.SOKENDAI, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
2.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
3.Natl Astron Observ Japan, Mizusawa VLBI Observ, Mizusawa Ku, 2-21 Hoshi Ga Oka, Oshu, Iwate 0230861, Japan
4.Otsuma Womens Univ, Fac Home Econ, Dept Child Studies, Chiyoda Ku, 12 Sanban Cho, Tokyo 1028357, Japan
5.Korea Astron & Space Sci Inst, 776 Daedeokdaero, Yuseong 34055, Daejeon, South Korea
6.Univ Sci & Technol, 217 Gajeong Ro, Daejeon 34113, South Korea
7.Natl Astron Res Inst Thailand Publ Org, 260 Moo 4, Chiang Mai 50180, Thailand
8.Yamaguchi Univ, Grad Sch Sci & Technol Innovat, Yoshida 1677-1, Yamaguchi 7538512, Japan
9.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
10.Nanjing Univ, Sch Astron & Space Sci, 22 Hankou Rd, Nanjing 210093, Peoples R China
11.North West Univ, Phys Dept, Space Res Unit, ZA-2520 Potchefstroom, South Africa
12.Univ Nigeria, Fac Phys Sci, Dept Phys & Astron, Carver Bldg,1 Univ Rd, Nsukka, Nigeria
13.Yamaguchi Univ, Res Inst Time Studies, Yoshida 167701, Yamaguchi 7538511, Japan
Recommended Citation
GB/T 7714
Kim, Jungha,Kim, Mi Kyoung,Hirota, Tomoya,et al. Multiple Outflows in the High-mass Cluster-forming Region G25.82-0.17[J]. ASTROPHYSICAL JOURNAL,2020,896(2):10.
APA Kim, Jungha.,Kim, Mi Kyoung.,Hirota, Tomoya.,Kim, Kee-Tae.,Sugiyama, Koichiro.,...&Sunada, Kazuyoshi.(2020).Multiple Outflows in the High-mass Cluster-forming Region G25.82-0.17.ASTROPHYSICAL JOURNAL,896(2),10.
MLA Kim, Jungha,et al."Multiple Outflows in the High-mass Cluster-forming Region G25.82-0.17".ASTROPHYSICAL JOURNAL 896.2(2020):10.
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