Результаты исследований: Вклад в журнал › Статья › Рецензирование
Результаты исследований: Вклад в журнал › Статья › Рецензирование
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TY - JOUR
T1 - A Keplerian disk with a four-arm spiral birthing an episodically accreting high-mass protostar
AU - Burns, R. a.
AU - Uno, Y.
AU - Sakai, N.
AU - Blanchard, J.
AU - Rosli, Z.
AU - Orosz, G.
AU - Yonekura, Y.
AU - Tanabe, Y.
AU - Sugiyama, K.
AU - Hirota, T.
AU - Kim, Kee-Tae
AU - Aberfelds, A.
AU - Volvach, A. e.
AU - Bartkiewicz, A.
AU - Caratti o garatti, A.
AU - Sobolev, A. m.
AU - Stecklum, B.
AU - Brogan, C.
AU - Phillips, C.
AU - Ladeyschikov, D. a.
AU - Johnstone, D.
AU - Surcis, G.
AU - Macleod, G. c.
AU - Linz, H.
AU - Chibueze, J. o.
AU - Brand, J.
AU - Eislöffel, J.
AU - Hyland, L.
AU - Uscanga, L.
AU - Olech, M.
AU - Durjasz, M.
AU - Bayandina, O.
AU - Breen, S.
AU - Ellingsen, S. p.
AU - Van den heever, S. p.
AU - Hunter, T. r.
AU - Chen, X.
N1 - R.A.B. acknowledges support through the EACOA Fellowship from the East Asian Core Observatories Association. R.A.B., J.O.C. and G.C.M. acknowledge the Global Emerging Radio Astronomy Foundation for contributions to radio astronomy. T.H. is financially supported by the MEXT/JSPS KAKENHI Grant nos. 17K05398, 18H05222 and 20H05845. Y.Y. is financially supported by the MEXT/JSPS KAKANHI Grant nos. 21H01120 and 21H00032. L.U. acknowledges support from the University of Guanajuato (Mexico) Grant ID CIIC 164/2022. A.C.o.G. acknowledges support by PRIN-INAF-MAIN-STREAM 2017. M.O. thanks the Ministry of Education and Science of the Republic of Poland for support and granting funds for the Polish contribution to the International LOFAR Telescope (arrangement no. 2021/WK/02) and for maintenance of the LOFAR PL-612 Baldy (MSHE decision no. 28/530020/SPUB/SP/2022). A.B. and M.D. acknowledge support from the National Science Centre, Poland through Grant 2021/43/B/ST9/02008. O.B. acknowledges financial support from the Italian Ministry of University and Research – Project Proposal CIR01_00010. A.M.S. and D.A.L. were supported by the Ministry of Science and Higher Education of the Russian Federation (state contract FEUZ-2023-0019). D.J. is supported by NRC Canada and by an NSERC Discovery Grant.
PY - 2023
Y1 - 2023
N2 - High-mass protostars (M-star > 8M(circle dot)) are thought to gain the majority of their mass via short, intense bursts of growth. This episodic accretion is thought to be facilitated by gravitationally unstable and subsequently inhomogeneous accretion disks. Limitations of observational capabilities, paired with a lack of observed accretion burst events, have withheld affirmative confirmation of the association between disk accretion, instability and the accretion burst phenomenon in high-mass protostars. Following its 2019 accretion burst, a heatwave driven by a burst of radiation propagated outward from the high-mass protostar G358.93-0.03-MM1. Six very long baseline interferometry observations of the radiatively pumped 6.7 GHz methanol maser were conducted during this period, tracing ever increasing disk radii as the heatwave propagated outward. Concatenating the very long baseline interferometry maps provided a sparsely sampled, milliarcsecond view of the spatio-kinematics of the accretion disk covering a physical range of similar to 50-900 AU. We term this observational approach 'heatwave mapping'. We report the discovery of a Keplerian accretion disk with a spatially resolved four-arm spiral pattern around G358.93-0.03-MM1. This result positively implicates disk accretion and spiral arm instabilities into the episodic accretion high-mass star formation paradigm.
AB - High-mass protostars (M-star > 8M(circle dot)) are thought to gain the majority of their mass via short, intense bursts of growth. This episodic accretion is thought to be facilitated by gravitationally unstable and subsequently inhomogeneous accretion disks. Limitations of observational capabilities, paired with a lack of observed accretion burst events, have withheld affirmative confirmation of the association between disk accretion, instability and the accretion burst phenomenon in high-mass protostars. Following its 2019 accretion burst, a heatwave driven by a burst of radiation propagated outward from the high-mass protostar G358.93-0.03-MM1. Six very long baseline interferometry observations of the radiatively pumped 6.7 GHz methanol maser were conducted during this period, tracing ever increasing disk radii as the heatwave propagated outward. Concatenating the very long baseline interferometry maps provided a sparsely sampled, milliarcsecond view of the spatio-kinematics of the accretion disk covering a physical range of similar to 50-900 AU. We term this observational approach 'heatwave mapping'. We report the discovery of a Keplerian accretion disk with a spatially resolved four-arm spiral pattern around G358.93-0.03-MM1. This result positively implicates disk accretion and spiral arm instabilities into the episodic accretion high-mass star formation paradigm.
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000943209900001
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85148934661
U2 - 10.1038/s41550-023-01899-w
DO - 10.1038/s41550-023-01899-w
M3 - Article
VL - 7
SP - 557
EP - 568
JO - Nature Astronomy
JF - Nature Astronomy
SN - 2397-3366
IS - 5
ER -
ID: 40043577