Chilson, Ryan Chilson, Ryan

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The first ever image of a black hole shadow in the human history. The image is a supermassive black hole at the center of an elliptical galaxy M87 at the center of the Virgo cluster (EHT Collaboration et al. 2019, ApJL, 875, L1).

The First Black Hole Shadow Image

The first image of the supermassive black hole at the center of our Galaxy, Sgr A*. With this image, we are now very sure that this source is a supermassive black hole (in the Nobel Prize in Physics 2020, this source was still expressed as "a supermassive compact object at the centre of our galaxy").

Astronomers Reveal First Image of the Black Hole at the Heart of Our Galaxy

The polarized light at the vicinity of the black hole for the first time (EHT Collaboration et al. 2021, ApJL, 910, L12), which carries the magnetic field and plasma information very close to the black hole.

First Polarization Image around the Black Hole Shadow

Photo of the bottom side of two IF Processor chassis under construction in Hilo office. Visible are the four 0-2 GHz baseband channels, DC power supplies, and ADAM monitor and control. IF processing and down conversion sections are on the far side.

IF Processor Chassis, GLT Project

Internal photos of Block Down Converter instrument: left - top view of RF brackets (x4), and monitor & control; right - bottom view of DC power supplies (x4), local oscillator plates (x2), and baseband plates (x4). Developed at the SMA project office by Derek Kubo, Ryan Chilson and John Kuroda for the SMA wideband upgrade project, this instrument provides signal conditioning and frequency translation of sixteen 8-12 GHz intermediate frequency channels from the eight SMA antennas. Two of these instruments were deployed to the Mauna Kea facility with a full suite of control software developed by Ranjani Srinivasan.

RF Block Down Converter Chassis, SMA Project

Internal photos of Photonics LO Transmitter instrument. Left - top view of optical and RF components including Optilab 40 GHz transmitter, erbium doped fiber amplifier, 30 GHz receiver, low noise DC power supply, and ADAM monitor & control. Right - bottom view of phase lock sources, RF components, DC power supply for cooling fans, and voltage regulation.

Photonics Local Oscillator Transmitter, GLT Project

The cryostat chamber mounted on an alumina holding structure (The dewar frame) shown in the center of the picture. Except for few instruments fixed on the dewar frame, most frontend hardware is installed into 36U height rack that locates on dewar left and right side. The vacuum pump sits under the dewar with long bellow pipe connect to the dewar chamber.

GLT Frontend System

Chilson, Ryan Electronic/Electrical Technician
	辦公室: Hilo 212 (temporary) 808-961-2925 電子信箱: rchilsonasiaa.sinica.edu.tw

期刊論文(中研院就職期間發表)

Chen M-T; Asada K; Matsushita S; Raffin P; Inoue M; Ho PTP; Han C-C; Kubo D; Norton T; Patel NA; Nystrom G; Huang C-WL; Martin-Cocher P; Koay JY; Romero-Cañizales C; Liu C-T; Huang T; Liu K-Y; Wei T; Chang S-H; Chilson R; Oshiro P; Jiang H; Li C-T; Bower G; Shaw P; Nishioka H; Koch PM; Chen C-C; Srinivasan R; Rao R; Snow W; Jinchi H; Han K-C; Chang S-C; Lu L-M; Ogawa H; Kimura K; Hasegawa Y; Pu H-Y; Koyama S; Nakamura M; Bintley D; Walther C; Friberg P; Dempsey J; Sriharan TK; Srikanth S; Doeleman SS; Brissenden R; Algaba Marcos J-C; Jeter B; Kuo C-Y; Park J, "The Greenland Telescope-Construction, Commissioning, and Operations in Pituffik" , PASP: 135 (1051), id.095001 (25 pp), Sep, 2023 [SCI] ( ADS | Fulltext )
Lu R-S; Asada K; Krichbaum TP; Park J; Tazaki F; Pu H-Y; Nakamura M; Lobanov A; Hada K; Akiyama K; Kim J-Y; Marti-Vidal I; Gómez JL; Kawashima T; Yuan F; Ros E; Alef W; Britzen S; Bremer M; Broderick AE; Doi A; Giovannini G; Giroletti M; Ho PTP; Honma M; Hughes DH; Inoue M; Jiang W; Kino M; Koyama S; Lindqvist M; Liu J; Marscher AP; Matsushita S; Nagai H; Rottmann H; Savolainen T; Schuster K-F; Shen Z-Q; De Vicente P; Walker RC; Yang H; Zensus JA; Algaba JC; Allardi A; Bach U; Berthold R; Bintley D; Byun D-Y; Casadio C; Chang S-H; Chang C-C; Chang S-C; Chen C-C; Chen M-T; Chilson R; Chuter TC; Conway J; Crew GB; Dempsey JT; Dornbusch S; Faber A; Friberg P; García JG; Garrido MG; Han C-C; Han K-C; Hasegawa Y; Herrero-Illana R; Huang Y-D; Huang C-WL; Impellizzeri V; Jiang H; Jinchi H; Jung T; Kallunki J; Kirves P; Kimura K; Koay JY; Koch PM; Kramer C; Kraus A; Kubo D; Kuo C-Y; Li C-T; Lin LC-C; Liu C-T; Liu K-Y; Lo W-P; Lu L-M; Macdonald N; Martin-Cocher P; Messias H; Meyer-Zhao Z; Minter A; Nair DG; Nishioka H; Norton TJ; Nystrom G; Ogawa H; Oshiro P; Patel NA; Pen U-L; Pidopryhora Y; Pradel N; Raffin PA; Rao R; Ruiz I; Sanchez S; Shaw P; Snow W; Sridharan TK; Srinivasan R; Tercero B; Torne P; Traianou E; Wagner J; Walther C; Wei T-S; Yang J; Yu C-Y, "A ring-like accretion structure in M87 connecting its black hole and jet" , Nature: 616(7958), 686-690, April, 2023 [SCI] ( ADS | Fulltext )
EHT Collaboration; Akiyama K; Alberdi A; Alef W; Algaba JC; Anantua R; Asada K; Azulay R; Bach U; Baczko A-K; Ball D; Baloković M; Barrett J; Bauböck M; Benson BA; Bintley D; Blackburn L; Blundell R; Bouman KL; Bower GC; Boyce H; Bremer M; Brinkerink CD; Brissenden R; Britzen S; Broderick AE; Broguiere D; Bronzwaer T; Bustamante S; Byun D-Y; Carlstrom JE; Ceccobello C; Chael A; Chan C-K; Chatterjee K; Chatterjee S; Chen M-T; Chen Y; Cheng X; Cho I; Christian P; Conroy NS; Conway JE; Cordes JM; Crawford TM; Crew GB; Cruz-Osorio A; Cui Y; Davelaar J; Laurentis MD; Deane R; Dempsey J; Desvignes G; Dexter J; Dhruv V; Doeleman SS; Dougal S; Dzib SA; Eatough RP; Emami R; Falcke H; Farah J; Fish VL; Fomalont E; Ford HA; Fraga-Encinas R; Freeman WT; Friberg P; Fromm CM; Fuentes A; Galison P; Gammie CF; García R; Gentaz O; Georgiev B; Goddi C; Gold R; Gómez-Ruiz AI; Gómez JL; Gu M; Gurwell M; Hada K; Haggard D; Haworth K; Hecht MH; Hesper R; Heumann D; Ho LC; Ho P; Honma M; Huang C-WL; Huang L; Hughes DH; Ikeda S; Impellizzeri CMV; Inoue M; Issaoun S; James DJ; Jannuzi BT; Janssen M; Jeter B; Jiang W; Jiménez-Rosales A; Johnson MD; Jorstad S; Joshi AV; Jung T; Karami M; Karuppusamy R; Kawashima T; Keating GK; Kettenis M; Kim D-J; Kim J-Y; Kim J; Kim J; Kino M; Koay JY; Kocherlakota P; Kofuji Y; Koch PM; Koyama S; Kramer C; Kramer M; Krichbaum TP; Kuo C-Y; Bella NL; Lauer TR; Lee D; Lee S-S; Leung PK; Levis A; Li Z; Lico R; Lindahl G; Lindqvist M; Lisakov M; Liu J; Liu K; Liuzzo E; Lo W-P; Lobanov AP; Loinard L; Lonsdale CJ; Lu R-S; Mao J; Marchili N; Markoff S; Marrone DP; Marscher AP; Martí-Vidal I; Matsushita S; Matthews LD; Medeiros L; Menten KM; Michalik D; Mizuno I; Mizuno Y; Moran JM; Moriyama K; Moscibrodzka M; Müller C; Mus A; Musoke G; Myserlis I; Nadolski A; Nagai H; Nagar NM; Nakamura M; Narayan R; Narayanan G; Natarajan I; Nathanail A; Fuentes SN; Neilsen J; Neri R; Ni C; Noutsos A; Nowak MA; Oh J; Okino H; Olivares H; Ortiz-León GN; Oyama T; özel F; Palumbo DCM; Paraschos GF; Park J; Parsons H; Patel N; Pen U-L; Pesce DW; Piétu V; Plambeck R; Popstefanija A; Porth O; Pötzl FM; Prather B; Preciado-López JA; Psaltis D; Pu H-Y; Ramakrishnan V; Rao R; Rawlings MG; Raymond AW; Rezzolla L; Ricarte A; Ripperda B; Roelofs F; Rogers A; Ros E; Romero-Cañizales C; Roshanineshat A; Rottmann H; Roy AL; Ruiz I; Ruszczyk C; Rygl KLJ; Sánchez S; Sánchez-Argüelles D; Sánchez-Portal M; Sasada M; Satapathy K; Savolainen T; Schloerb FP; Schonfeld J; Schuster K-F; Shao L; Shen Z; Small D; Sohn BW; Soohoo J; Souccar K; Sun H; Tazaki F; Tetarenko AJ; Tiede P; Tilanus RPJ; Titus M; Torne P; Traianou E; Trent T; Trippe S; Turk M; Van Bemmel I; Van Langevelde HJ; Van Rossum DR; Vos J; Wagner J; Ward-Thompson D; Wardle J; Weintroub J; Wex N; Wharton R; Wielgus M; Wiik K; Witzel G; Wondrak MF; Wong GN; Wu Q; Yamaguchi P; Yoon D; Young A; Young K; Younsi Z; Yuan F; Yuan Y-F; Zensus JA; Zhang S; Zhao G-Y; Zhao S-S; Agurto C; Allardi A; Amestica R; Araneda JP; Arriagada O; Berghuis JL; Bertarini A; Berthold R; Blanchard J; Brown K; Cárdenas M; Cantzler M; Caro P; Castillo-Domínguez E; Chan TL; Chang C-C; Chang DO; Chang S-H; Chang S-C; Chen C-C; Chilson R; Chuter TC; Ciechanowicz M; Colin-Beltran E; Coulson IM; Crowley J; Degenaar N; Dornbusch S; Durán CA; Everett WB; Faber A; Forster K; Fuchs MM; Gale DM; Geertsema G; González E; Graham D; Gueth F; Halverson NW; Han C-C; Han K-C; Hasegawa Y; Hernández-Rebollar JL; Herrera C; Herrero-Illana R; Heyminck S; Hirota A; Hoge J; Hostler Schimpf SR; Howie RE; Huang Y-D; Jiang H; Jinchi H; John D; Kimura K; Klein T; Kubo D; Kuroda J; Kwon C; Lacasse R; Laing R; Leitch EM; Li C-T; Liu C-T; Liu K-Y; Lin LCC; Lu L-M; Mac-Auliffe F; Martin-Cocher P; Matulonis C; Maute JK; Messias H; Meyer-Zhao Z; Montaña A; Montenegro-Montes F; Montgomerie W; Moreno Nolasco ME; Muders D; Nishioka H; Norton TJ; Nystrom G; Ogawa H; Olivares R; Oshiro P; Pérez-Beaupuits JP; Parra R; Phillips NM; Poirier M; Pradel N; Qiu R; Raffin PA; Rahlin AS; Ramírez J; Ressler S; Reynolds M; Rodríguez-Montoya I; Saez-Madain AF; Santana J; Shaw P; Shirkey LE; Silva KM; Snow W; Sousa D; Sridharan TK; Stahm W; Stark AA; Test J; Torstensson K; Venegas P; Walther C; Wei T-S; White C; Wieching G; Wijnands R; Wouterloot JGA; Yu C-Y; Yu W; Zeballos M, "First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way" , ApJL: 930(2), id.L12 (21pp), May, 2022 [SCI] ( ADS | Fulltext )
Kim J-Y; Krichbaum TP; Broderick AE; ...; Asada K; ...; Bower GC; ...; Chen MT; ...; Ho P; ...; Huang C-WL; ...; Inoue M; ...; Koay JY; Koch PM; Koyama S; ...; Kuo CY; ...; Lo WP; ...; Matsushita S; ...; Nakamura M; ...; Rao R; ...; Algaba J-C; ...; Chang C-C; Chang S-H; ...; Chen C-C; Chilson R; ...; Han C-C; ...; Huang Y-D; ...; Jiang H; ...; Kubo D; ...; Li C-T; Lin LC-C; ...; Liu K-Y; ...; Martin-Cocher PL; ...; Meyer-Zhao Z; ...; Nishioka H; ...; Nystrom G; ...; Oshiro P; ...; Pradel N; ...; Raffin PA; ...; Shaw P; ...; Snow W; ...; Srinivasan R; ...; Wei T-S; ...; Yu C-Y; et al., "Event Horizon Telescope Imaging of the Archetypal Blazar 3C 279 at an Extreme 20 Microarcsecond Resolution" , A&A: 640, id.A69 (21pp.), Aug, 2020 [SCI] ( ADS | Fulltext )
Event Horizon Telescope Collaboration; Akiyama K; Alberdi A; ...; Asada K; ...; Bower GC; ...; Chen MT; ...; Ho PTP; ...; Huang C-W L; ...; Inoue M; ...; Koay JY; Koch PM; Koyama S; ...; Kuo C-Y; ...; Lo W-P; ...; Matsushita S; ...; Nakamura M; ...; Pen U-L; ...; Pu H-Y; ...; Rao R; ...; Algaba J-C; ...; Chang C-C; Chang S-H; Chen C-C; Chilson R; ...; Han C-C; ...; Huang Y-D;...; Jiang H; ...; Kubo D; ...; Li C-T; Lin LC-C; ...; Liu K-Y; ...; Martin-Cocher PL; ...; Meyer-Zhao Z; ...; Nishioka H; ...; Nystrom G; ...; Oshiro P; ...; Pradel N; ...; Raffin PA; ...; Shaw P; ...; Snow W; ...; Srinivasan R; ...; Wei T-S; Yu C-Y; et al., "First M87 Event Horizon Telescope Results. II. Array and Instrumentation" , ApJL: 875(1), id. L2 (28 pp.), Apr, 2019 [SCI] ( ADS | Fulltext )
Event Horizon Telescope Collaboration; Akiyama K; Alberdi A; ...; Asada K; ...; Bower GC; Chen MT; ...; Ho PTP; ...; Huang C-W L; ...; Inoue M; ...; Koay JY; Koch PM; Koyama S; ...; Kuo C-Y; ...; Lo W-P; ...; Matsushita S; ...; Nakamura M; ...; Pen U-L; ...; Pu H-Y; ...; Rao R; ...; Algaba J-C; ...; Chang C-C; Chang S-H; Chen C-C; Chilson R; ...; Han C-C; ...; Hasegawa Y; ...; Impellizzeri CMV; ...; Hirota A; ...; Huang Y-D; ...; Jiang H; ...; Kimura K; ...; Li C-T; Lin LC-C; ...; Liu K-Y; ...; Martin-Cocher PL; ...; Meyer-Zhao Z; ...; Nishioka H; ...; Nystrom G; ...; Oshiro P; ...; Pradel N; ...; Raffin PA; ...; Shaw P; ...; Snow W; ...; Srinivasan R; ...; Wei T-S; Yu C-Y; et al., "First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole" , ApJL: 875(1), id. L1 (17 pp.), Apr, 2019 [SCI] ( ADS | Fulltext )