How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions

doi:10.3847/1538-4357/aa8b62

	How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions
	Rao, Ramprasad 32; Herczeg, Gregory J.16; Johnstone, Doug 14,41; Mairs, Steve 14,41; Hatchell, Jennifer 15; Lee, Jeong-Eun 17; Bower, Geoffrey C.18; Chen, Huei-Ru Vivien 19; Aikawa, Yuri 20; Yoo, Hyunju 17,21
刊名	ASTROPHYSICAL JOURNAL
	2017-11-01
卷号	849 期号:1
关键词	Stars: Formation Stars: protoStars Submillimeter: Stars Stars: Variables: t Tauri Herbig Ae/be
DOI	10.3847/1538-4357/aa8b62
文献子类	Article
英文摘要	Most protostars have luminosities that are fainter than expected from steady accretion over the protostellar lifetime. The solution to this problem may lie in episodic mass accretion -- prolonged periods of very low accretion punctuated by short bursts of rapid accretion. However, the timescale and amplitude for variability at the protostellar phase is almost entirely unconstrained. In "A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star Forming Regions", we are monitoring monthly with SCUBA-2 the sub-mm emission in eight fields within nearby (<500 pc) star forming regions to measure the accretion variability of protostars. The total survey area of similar to 1.6 sq.deg. includes similar to 105 peaks with peaks brighter than 0.5 Jy/beam (43 associated with embedded protostars or disks) and 237 peaks of 0.125-0.5 Jy/beam (50 with embedded protostars or disks). Each field has enough bright peaks for flux calibration relative to other peaks in the same field, which improves upon the nominal flux calibration uncertainties of sub-mm observations to reach a precision of similar to 2-3% rms, and also provides quantified confidence in any measured variability. The timescales and amplitudes of any sub-mm variation will then be converted into variations in accretion rate and subsequently used to infer the physical causes of the variability. This survey is the first dedicated survey for sub-mm variability and complements other transient surveys at optical and near-IR wavelengths, which are not sensitive to accretion variability of deeply embedded protostars.
WOS关键词	GOULD BELT SURVEY ; CLERK MAXWELL TELESCOPE ; PERSEUS MOLECULAR CLOUD ; YOUNG STELLAR OBJECTS ; SPITZER C2D SURVEY ; SURVEY SCUBA-2 OBSERVATIONS ; DUST CONTINUUM EMISSION ; SMALL-SCALE STRUCTURES ; FU-ORIONIS OBJECTS ; RHO-OPHIUCHI CLOUD
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000413865300014
资助机构	National Science Foundation of China(11473005) ; National Science Foundation of China(11473005) ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; National Research Council of Canada ; National Research Council of Canada ; NSERC ; NSERC ; National Research Foundation of Korea (NRF)(NRF-2015R1A2A2A01004769) ; National Research Foundation of Korea (NRF)(NRF-2015R1A2A2A01004769) ; Korea Astronomy and Space Science Institute(2015-1-320-18) ; Korea Astronomy and Space Science Institute(2015-1-320-18) ; Canadian Institute for Theoretical Astrophysics (CITA) ; Canadian Institute for Theoretical Astrophysics (CITA) ; National Research Foundation of Korea(NRF) - Ministry of Science, ICT & Future Planning(NRF-2015R1C1A1A01052160) ; National Research Foundation of Korea(NRF) - Ministry of Science, ICT & Future Planning(NRF-2015R1C1A1A01052160) ; National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning(NRF-2016R1C1B2013642) ; National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning(NRF-2016R1C1B2013642) ; National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology(NRF-2016R1A2B4012593) ; National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology(NRF-2016R1A2B4012593) ; Austrian Science Fund (FWF)(I2549-N27) ; Austrian Science Fund (FWF)(I2549-N27) ; Ministry of Science and Technology (MoST) of Taiwan(102-2119-M-007-004-MY3 ; Ministry of Science and Technology (MoST) of Taiwan(102-2119-M-007-004-MY3 ; Chinese Academy of Sciences(XDB09000000) ; Chinese Academy of Sciences(XDB09000000) ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; Canadian Space Agency ; Canadian Space Agency ; CANARIE ; CANARIE ; Compute Canada ; Compute Canada ; University of Victoria ; University of Victoria ; 105-2119-M-007-024) ; 105-2119-M-007-024) ; National Science Foundation of China(11473005) ; National Science Foundation of China(11473005) ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; Natural Sciences and Engineering Research Council (NSERC) of Canada ; National Research Council of Canada ; National Research Council of Canada ; NSERC ; NSERC ; National Research Foundation of Korea (NRF)(NRF-2015R1A2A2A01004769) ; National Research Foundation of Korea (NRF)(NRF-2015R1A2A2A01004769) ; Korea Astronomy and Space Science Institute(2015-1-320-18) ; Korea Astronomy and Space Science Institute(2015-1-320-18) ; Canadian Institute for Theoretical Astrophysics (CITA) ; Canadian Institute for Theoretical Astrophysics (CITA) ; National Research Foundation of Korea(NRF) - Ministry of Science, ICT & Future Planning(NRF-2015R1C1A1A01052160) ; National Research Foundation of Korea(NRF) - Ministry of Science, ICT & Future Planning(NRF-2015R1C1A1A01052160) ; National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning(NRF-2016R1C1B2013642) ; National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning(NRF-2016R1C1B2013642) ; National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology(NRF-2016R1A2B4012593) ; National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology(NRF-2016R1A2B4012593) ; Austrian Science Fund (FWF)(I2549-N27) ; Austrian Science Fund (FWF)(I2549-N27) ; Ministry of Science and Technology (MoST) of Taiwan(102-2119-M-007-004-MY3 ; Ministry of Science and Technology (MoST) of Taiwan(102-2119-M-007-004-MY3 ; Chinese Academy of Sciences(XDB09000000) ; Chinese Academy of Sciences(XDB09000000) ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; Canadian Space Agency ; Canadian Space Agency ; CANARIE ; CANARIE ; Compute Canada ; Compute Canada ; University of Victoria ; University of Victoria ; 105-2119-M-007-024) ; 105-2119-M-007-024)
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/20212]
专题	国家天文台_射电天文研究部
作者单位	1.Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales 2.Univ Cent Lancashire, Jeremiah Horrocks Inst Math Phys & Astron, Preston PR1 2HE, Lancs, England 3.Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England 4.CALTECH, Dept Astron, MC 249-17, Pasadena, CA 91125 USA 5.Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi 4648602, Japan 6.Korea Natl Univ Educ, Cheongju 28173, Chungbuk, South Korea 7.Natl Taiwan Normal Univ, Dept Earth Sci, Taipei 116, Taiwan 8.Korea Univ Sci & Technol, 217 Gajang Ro, Daejeon 34113, South Korea 9.Peking Univ, Dept Astron, Yiheyuan 5, Beijing 100871, Peoples R China 10.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Rao, Ramprasad,Herczeg, Gregory J.,Johnstone, Doug,et al. How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions[J]. ASTROPHYSICAL JOURNAL,2017,849(1).
APA	Rao, Ramprasad.,Herczeg, Gregory J..,Johnstone, Doug.,Mairs, Steve.,Hatchell, Jennifer.,...&Parsons, Harriet.(2017).How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions.ASTROPHYSICAL JOURNAL,849(1).
MLA	Rao, Ramprasad,et al."How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions".ASTROPHYSICAL JOURNAL 849.1(2017).