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5 papers
First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
The Event Horizon Telescope Collaboration
We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A), the Galactic center source associated with a supermassive black hole. These observati…
A Decade of SCUBA-2: A Comprehensive Guide to Calibrating 450 m and 850 m Continuum Data at the JCMT
Steve Mairs, Jessica T. Dempsey, Graham S. Bell +24
The Submillimetre Common User Bolometer Array 2 (SCUBA-2) is the James Clerk Maxwell Telescope's continuum imager, operating simultaneously at 450 and 850~m. SCUBA-2 was commiss…
Phosphine Gas in the Cloud Decks of Venus
Jane S. Greaves, Anita M. S. Richards, William Bains +16
Measurements of trace-gases in planetary atmospheres help us explore chemical conditions different to those on Earth. Our nearest neighbor, Venus, has cloud decks that are temperat…
First M87 Event Horizon Telescope Results. II. Array and Instrumentation
The Event Horizon Telescope Collaboration
The Event Horizon Telescope (EHT) is a very long baseline interferometry (VLBI) array that comprises millimeter- and submillimeter-wavelength telescopes separated by distances comp…
Rotation State of Comet 103P/Hartley 2 from Radio Spectroscopy at 1 mm
Michal Drahus, David Jewitt, Aurelie Guilbert-Lepoutre +6
The nuclei of active comets emit molecules anisotropically from discrete vents. As the nucleus rotates, we expect to observe periodic variability in the molecular emission line pro…