KMS of Xinjiang Astronomical Observatory, CAS
| 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
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| 2020-01-13 | |
| Source Publication | NATURE ASTRONOMY
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| ISSN | 2397-3366 |
| Pages | 5 |
| Contribution Rank | 12 |
| Abstract | A 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. |
| DOI | 10.1038/s41550-019-0989-3 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | METHANOL MASERS |
| Funding Project | EACOA 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 Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000508167700002 |
| Publisher | NATURE PUBLISHING GROUP |
| Funding Organization | EACOA 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 | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3319 |
| Collection | 已撤销研究室/团组_VLBI天体物理与技术应用研究团组 |
| Corresponding Author | Burns, R. A. |
| Affiliation | 1.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. |
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| Burns-2020-A heatwav（1414KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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