http://www.scintillatingastronomy.com/research daily 0.75 2017-02-10 https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448635107455-R3M2OOPJO6RSO7O0SQR4/image-asset.png Research "Brilliant, Watson. You are scintillating this morning." - The Valley of Fear, Arthur Conan Doyle https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1486761310914-FMPUP8GUI3DE900CJNU6/EHT.jpg Research Photo Credits: APEX, IRAM, G. Narayanan, J. McMahon, JCMT/JAC, S. Hostler, D. Harvey, ESO/C. Malin https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448726456895-XMJALQQPGKOGX8KFEDR3/image-asset.jpeg Research Imaging a Black Hole. At left is a model image for Sgr A* using a semi-analytic accretion flow (Broderick et al. 2011). Light is gravitationally lensed by the black hole to form a distinctive “ring” encircling the black hole’s “shadow” (Falcke et al. 2000). The ring diameter is ~5 Schwarzschild radii . The image is bright on the approaching side of the accretion disk and faint on the receding side because of Doppler effects. At right, a sample image shows expected EHT performance in 2017-2018 (Fish, Johnson, et al. 2014). https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448650819553-0CXKRRI2QSWPIC36WKDV/Scattering_Example.jpg Research Different regimes of scattering for a source that is a ring (shown at left). https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448648477931-GYY0JVXQDP6RFSIUH732/image-asset.jpeg Research From Johnson, Gwinn, and Demorest (2012; http://adsabs.harvard.edu/abs/2012ApJ...758....8J). https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1449244973826-AZ1QPUO5PACFL7GGGTZP/hires.jpg Research In this artist’s conception, the black hole at the center of our galaxy is surrounded by a hot disk of accreting material. Blue lines trace magnetic fields. The Event Horizon Telescope has measured those magnetic fields for the first time with a resolution of 6 times the size of the event horizon (6 Schwarzschild radii). It found the fields in the disk to be disorderly, with jumbled loops and whorls resembling intertwined spaghetti. The EHT also found regions showing a much more organized pattern, possibly where jets (shown by the narrow yellow streamer) would be generated. Credit: CfA/M. Weiss https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1449245060262-65PUBF5SMA7G4VFXWRLT/image-asset.jpeg Research This comic illustrates how the Event Horizon Telescope can measure magnetic fields at our galaxy's core. Credit: Event Horizon Telescope https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448632618671-NPQ9XQ3XA6SND5397FLS/Holes_Watson.png Research https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448633642616-MG457OU4CI78AVOWYOUT/EHT_Image4_justglobe_wBackground.jpg Research https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448635314111-DAW3M083UJHNJ0HJ4FKF/Pulsar_Emission_2.jpg Research https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448649371176-KUE8HLUH9RVK0SYM9CJA/Scattered_Ring.jpg Research https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1449244822018-76IE580VMAN7MODA0ECL/hires.jpg Research http://www.scintillatingastronomy.com/curriculum-vitae daily 0.75 2023-12-29 http://www.scintillatingastronomy.com/about-me daily 1.0 2024-01-07 https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1530378535534-70FQ803NES7QPK0DKH2N/Johnson.jpg About Me http://www.scintillatingastronomy.com/other-activities daily 0.75 2015-12-04 https://images.squarespace-cdn.com/content/v1/565664bee4b0060cdb5511ee/1448677004080-FCBY3W1S7ABFESXGAGXD/image-asset.jpeg Other Activities