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39 papers
CII fine-structure line observations of the Sagittarius C Region in the Galaxy's Central Molecular Zone
DEnise Riquelme-Vasquez, Rolf Guesten, Mark R. Morris +7
Context. Sagittarius C (Sgr C) is a massive, relatively quiescent complex at the western edge of the Galaxy's Central Molecular Zone (CMZ). While the Sgr B2 region has been extensi…
SOFIA-upGREAT imaging spectroscopy of the [C II] 158um fine structure line of the Sgr B region in the Galactic center
A. I. Harris, R. Güsten, M. A. Requena-Torres +8
We report SOFIA-upGREAT spectroscopic imaging of the [C II] 158um spectral line, as well as a number of [O I] 63um spectra, across a 67x45 pc field toward the Sgr B region in our G…
4GREAT -- a four-color receiver for high-resolution airborne terahertz spectroscopy
Carlos A. Durán, Rolf Güsten, Christophe Risacher +13
4GREAT is an extension of the German Receiver for Astronomy at Terahertz frequencies (GREAT) operated aboard the Stratospheric Observatory for Infrared Astronomy (SOFIA). The spect…
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…
First astrophysical detection of the helium hydride ion (HeH)
Rolf Güsten, Helmut Wiesemeyer, David Neufeld +7
During the dawn of chemistry when the temperature of the young Universe had fallen below 4000 K, the ions of the light elements produced in Big Bang nucleosynthesis recombine…
Disruption of the Orion Molecular Core 1 by the stellar wind of the massive star Ori C
C. Pabst, R. Higgins, J. R. Goicoechea +10
Massive stars inject mechanical and radiative energy into the surrounding environment, which stirs it up, heats the gas, produces cloud and intercloud phases in the interstellar me…