NAOC Open IR
Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz
Issaoun, S.1; Johnson, M. D.2; Blackburn, L.2; Broderick, A.3; Tiede, P.3; Wielgus, M.2,4; Doeleman, S. S.2; Falcke, H.1; Akiyama, K.5; Bower, G. C.6; Brinkerink, C. D.1; Chael, A.7; Cho, I8,9; Gomez, J. L.10; Hernandez-Gomez, A.11; Hughes, D.12; Kino, M.13,14; Krichbaum, T. P.11; Liuzzo, E.15; Loinard, L.16,17; Markoff, S.18; Marrone, D. P.19; Mizuno, Y.20,21,22; Moran, J. M.2; Pidopryhora, Y.11; Ros, E.11; Rygl, K.15; Shen, Z-Q23; Wagner, J.11
2021-07-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume915Issue:2Pages:14
AbstractObservations of the Galactic Center supermassive black hole Sagittarius A* (Sgr A*) with very long-baseline interferometry (VLBI) are affected by interstellar scattering along our line of sight. At long radio observing wavelengths (less than or similar to 1 cm), the scattering heavily dominates image morphology. At 3.5 mm (86 GHz), the intrinsic source structure is no longer sub-dominant to scattering, and thus the intrinsic emission from Sgr A* is resolvable with the Global Millimeter VLBI Array (GMVA). Long-baseline detections to the phased Atacama Large Millimeter/submillimeter Array (ALMA) in 2017 provided new constraints on the intrinsic and scattering properties of Sgr A*, but the stochastic nature of the scattering Requires multiple observing epochs to reliably estimate its statistical properties. We present new observations with the GMVA+ALMA, taken in 2018, which confirm non-Gaussian structure in the scattered image seen in 2017. In particular, the ALMA-GBT baseline shows more flux density than expected for an anistropic Gaussian model, providing a tight constraint on the source size and an upper limit on the dissipation scale of interstellar turbulence. We find an intrinsic source extent along the minor axis of similar to 100 mu as both via extrapolation of longer wavelength scattering constraints and direct modeling of the 3.5 mm observations. Simultaneously fitting for the scattering parameters, we find an at-most modestly asymmetrical (major-to-minor axis ratio of 1.5 +/- 0.2) intrinsic source morphology for Sgr A*.
Funding OrganizationERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI
DOI10.3847/1538-4357/ac00b0
WOS KeywordSUPERMASSIVE BLACK-HOLE ; SCATTER-BROADENED IMAGE ; VLBI OBSERVATIONS ; GALACTIC-CENTER ; EVENT-HORIZON ; RADIO-SOURCE ; ASYMMETRIC STRUCTURE ; SCALE STRUCTURE ; INTRINSIC SIZE ; CLOSURE PHASE
Language英语
Funding ProjectERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes"[610058] ; National Science Foundation[AST-1716536] ; National Science Foundation[AST-1440254] ; National Science Foundation[AST-1935980] ; National Science Foundation[AST-2034306] ; Gordon and Betty Moore Foundation[GBMF-5278] ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute[HST-HF2-51431.001-A] ; NASA[NAS5-26555] ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant[NRF-2015H1A2A1033752] ; DGAPA, UNAM[IN112417] ; DGAPA, UNAM[IN112820] ; CONACyT, Mexico[275201] ; CONACyT, Mexico[263356] ; JSPS KAKENHI[JP18K03656] ; JSPS KAKENHI[JP18H03721]
Funding OrganizationERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; ERC Synergy grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" ; National Science Foundation ; National Science Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; black hole Initiative - John Templeton Foundation ; black hole Initiative - John Templeton Foundation ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Hubble Fellowship - Space Telescope Science Institute ; Hubble Fellowship - Space Telescope Science Institute ; NASA ; NASA ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; National Research Foundation of Korea (NRF) via a Global PhD Fellowship grant ; DGAPA, UNAM ; DGAPA, UNAM ; CONACyT, Mexico ; CONACyT, Mexico ; JSPS KAKENHI ; JSPS KAKENHI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000672971700001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/76881
Collection中国科学院国家天文台
Corresponding AuthorIssaoun, S.
Affiliation1.Radboud Univ Nijmegen, IMAPP, Dept Astrophys, POB 9010, NL-6500 GL Nijmegen, Netherlands
2.Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
3.Perimeter Inst Theoret Phys, 31 Caroline St, North Waterloo, ON N2L 2Y5, Canada
4.Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 USA
5.MIT, Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA
6.Acad Sinica Inst Astron & Astrophys, 645 N Aohoku Pl, Hilo, HI 96720 USA
7.Princeton Univ, Princeton Ctr Theoret Sci, Jadwin Hall, Princeton, NJ 08544 USA
8.Korea Astron & Space Sci Inst, Daedeok Daero 776, Daejeon 34055, South Korea
9.Univ Sci & Technol, Gajeong Ro 217, Daejeon 34113, South Korea
10.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain
11.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
12.Inst Nacl Astrofis Opt & Elect INAOE, Apartado Postal 51 & 216, Puebla 72000, Mexico
13.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
14.Kogakuin Univ Technol & Engn, Acad Support Ctr, 2665-1 Nakano, Hachioji, Tokyo 1920015, Japan
15.INAF Ist Radioastron, Italian ALMA Reg Ctr, Via P Gobetti 101, I-40129 Bologna, Italy
16.Univ Nacl Autonoma Mexico, Inst Radioastron & Astrofis, Morelia 58089, Michoacan, Mexico
17.Univ Nacl Autonoma Mexico, Inst Astron, Apartado Postal 70-264, Ciudad De Mexico 04510, Mexico
18.Univ Amsterdam, Anton Pannekoek Inst Astron, NL-1098 XH Amsterdam, Netherlands
19.Univ Arizona, 933 North Cherry Ave, Tucson, AZ 85721 USA
20.Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany
21.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China
22.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
23.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
Recommended Citation
GB/T 7714
Issaoun, S.,Johnson, M. D.,Blackburn, L.,et al. Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz[J]. ASTROPHYSICAL JOURNAL,2021,915(2):14.
APA Issaoun, S..,Johnson, M. D..,Blackburn, L..,Broderick, A..,Tiede, P..,...&Wagner, J..(2021).Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz.ASTROPHYSICAL JOURNAL,915(2),14.
MLA Issaoun, S.,et al."Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz".ASTROPHYSICAL JOURNAL 915.2(2021):14.
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
[Issaoun, S.]'s Articles
[Johnson, M. D.]'s Articles
[Blackburn, L.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Issaoun, S.]'s Articles
[Johnson, M. D.]'s Articles
[Blackburn, L.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Issaoun, S.]'s Articles
[Johnson, M. D.]'s Articles
[Blackburn, L.]'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.