XAO OpenIR  > 射电天文研究室  > VLBI天体物理与技术应用研究团组
A heatwave of accretion energy traced by masers in the G358-MM1 high-mass protostar
Burns, R. A.1,2; Sugiyama, K.1,3; Hirota, T.1; Kim, Kee-Tae2,4; Sobolev, A. M.5; Stecklum, B.6; MacLeod, G. C.7,8; Yonekura, Y.9; Olech, M.10; Orosz, G.11,12; Ellingsen, S. P.11; Hyland, L.11; Garatti, A. Caratti O.13; Brogan, C.14; Hunter, T. R.14; Phillips, C.15; van den Heever, S. P.8; Eisloeffel, J.6; Linz, H.16; Surcis, G.17; Chibueze, J. O.18,19; Baan, W.20; Kramer, B.3,21
2020-01-13
Source PublicationNATURE ASTRONOMY
ISSN2397-3366
Pages5
Contribution Rank12
AbstractA ring of maser emission seemingly expanding at 0.05 c is actually tracing the propagation of heat through the circumstellar medium around a high-mass protostar rather than subluminal motion. The heatwave is a manifestation of an accretion burst. High-mass stars are thought to accumulate much of their mass via short, infrequent bursts of disk-aided accretion(1,2). Such accretion events are rare and difficult to observe directly but are known to drive enhanced maser emission(3-6). In this Letter we report high-resolution, multi-epoch methanol maser observations toward G358.93-0.03, which reveal an interesting phenomenon: the subluminal propagation of a thermal radiation 'heatwave' emanating from an accreting high-mass protostar. The extreme transformation of the maser emission implies a sudden intensification of thermal infrared radiation from within the inner (40-mas, 270-au) region. Subsequently, methanol masers trace the radial passage of thermal radiation through the environment at >= 4% of the speed of light. Such a high translocation rate contrasts with the <= 10 km s(-1) physical gas motions of methanol masers typically observed using very-long-baseline interferometry (VLBI). The observed scenario can readily be attributed to an accretion event in the high-mass protostar G358.93-0.03-MM1. While being the third case in its class, G358.93-0.03-MM1 exhibits unique attributes hinting at a possible 'zoo' of accretion burst types. These results promote the advantages of maser observations in understanding high-mass-star formation, both through single-dish maser monitoring campaigns and via their international cooperation as VLBI arrays.
DOI10.1038/s41550-019-0989-3
Indexed BySCI
Language英语
WOS KeywordMETHANOL MASERS
Funding ProjectEACOA Fellowship from the East Asian Core Observatories Association ; ARC[DP180101061] ; CAS LCWR grant[2018-XBQNXZ-B-021] ; Foundation for the Advancement of Theoretical Physics and Mathematics BASIS ; JSPS KAKENHI[JP19K03921] ; MEXT/JSPS KAKENHI[16K05293] ; MEXT/JSPS KAKENHI[17K05398] ; Italian Ministry of Foreign Affairs and International Cooperation (MAECI)[ZA18GR02] ; South African Department of Science and Technology's National Research Foundation (DST-NRF) as part of the ISARP RADIOSKY2020 Joint Research Scheme[113121] ; National Science Centre, Poland[2016/21/B/ST9/01455] ; Australian Government ; Government of Western Australia
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000508167700002
PublisherNATURE PUBLISHING GROUP
Funding OrganizationEACOA Fellowship from the East Asian Core Observatories Association ; ARC ; CAS LCWR grant ; Foundation for the Advancement of Theoretical Physics and Mathematics BASIS ; JSPS KAKENHI ; MEXT/JSPS KAKENHI ; Italian Ministry of Foreign Affairs and International Cooperation (MAECI) ; South African Department of Science and Technology's National Research Foundation (DST-NRF) as part of the ISARP RADIOSKY2020 Joint Research Scheme ; National Science Centre, Poland ; Australian Government ; Government of Western Australia
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3319
Collection射电天文研究室_VLBI天体物理与技术应用研究团组
Corresponding AuthorBurns, R. A.
Affiliation1.Natl Astron Observ Japan, Mizusawa VLBI Observ, Tokyo, Japan
2.Korea Astron & Space Sci Inst, Daejeon, South Korea
3.NARIT, Chiang Mai, Thailand
4.Univ Sci & Technol, Korea UST, Daejeon, South Korea
5.Ural Fed Univ, Ekaterinburg, Russia
6.Thuringer Landessternwarte, Tautenburg, Germany
7.Univ Western Ontario, London, ON, Canada
8.Hartebeesthoek Radio Astron Observ, Krugersdorp, South Africa
9.Ibaraki Univ, Ctr Astron, Ibaraki, Japan
10.Nicolaus Copernicus Univ, Ctr Astron, Fac Phys Astron & Informat, Torun, Poland
11.Univ Tasmania, Sch Nat Sci, Hobart, Tas, Australia
12.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi, Xinjiang, Peoples R China
13.Dublin Inst Adv Studies, Astron & Astrophys Sect, Dublin, Ireland
14.NRAO, Charlottesville, VA USA
15.CSIRO, Australia Telescope Natl Facil, Epping, NSW, Australia
16.Max Planck Inst Astron, Heidelberg, Germany
17.INAF Osservatorio Astron Cagliari, Selargius, Italy
18.North West Univ, Phys Dept, Space Res Unit, Potchefstroom, South Africa
19.Univ Nigeria, Fac Phys Sci, Dept Phys & Astron, Nsukka, Nigeria
20.Netherlands Inst Radio Astron, Dwingeloo, Netherlands
21.Max Planck Inst Radioastron, Bonn, Germany
Recommended Citation
GB/T 7714
Burns, R. A.,Sugiyama, K.,Hirota, T.,et al. A heatwave of accretion energy traced by masers in the G358-MM1 high-mass protostar[J]. NATURE ASTRONOMY,2020:5.
APA Burns, R. A..,Sugiyama, K..,Hirota, T..,Kim, Kee-Tae.,Sobolev, A. M..,...&Kramer, B..(2020).A heatwave of accretion energy traced by masers in the G358-MM1 high-mass protostar.NATURE ASTRONOMY,5.
MLA Burns, R. A.,et al."A heatwave of accretion energy traced by masers in the G358-MM1 high-mass protostar".NATURE ASTRONOMY (2020):5.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Burns, R. A.]'s Articles
[Sugiyama, K.]'s Articles
[Hirota, T.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Burns, R. A.]'s Articles
[Sugiyama, K.]'s Articles
[Hirota, T.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Burns, R. A.]'s Articles
[Sugiyama, K.]'s Articles
[Hirota, T.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.