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Faint objects in motion: the new frontier of high precision astrometry
Fabien Malbet, Céline Boehm, Alberto Krone-Martins +83
Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint ob…
Precise Masses and Orbits for Nine Radial Velocity Exoplanets
Yiting Li, Timothy D. Brandt, G. Mirek Brandt +6
Radial velocity (RV) surveys have discovered hundreds of exoplanetary systems but suffer from a fundamental degeneracy between planet mass and orbital inclination . In thi…
htof: A new open-source tool for analyzing Hipparcos, Gaia, and future astrometric missions
G. Mirek Brandt, Daniel Michalik, Timothy D. Brandt +3
We present htof, an open-source tool for interpreting and fitting the intermediate astrometric data (IAD) from both the 1997 and 2007 reductions of Hipparcos, the scanning-law of G…
The Design and Integrated Performance of SPT-3G
J. A. Sobrin, A. J. Anderson, A. N. Bender +120
SPT-3G is the third survey receiver operating on the South Pole Telescope dedicated to high-resolution observations of the cosmic microwave background (CMB). Sensitive measurements…
The First Dynamical Mass Measurement in the HR 8799 System
G. Mirek Brandt, Timothy D. Brandt, Trent J. Dupuy +2
HR 8799 hosts four directly imaged giant planets, but none has a mass measured from first principles. We present the first dynamical mass measurement in this planetary system, find…
First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon
The Event Horizon Telescope Collaboration
Event Horizon Telescope (EHT) observations at 230 GHz have now imaged polarized emission around the supermassive black hole in M87 on event-horizon scales. This polarized synchrotr…
First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
The Event Horizon Telescope Collaboration
In 2017 April, the Event Horizon Telescope (EHT) observed the near-horizon region around the supermassive black hole at the core of the M87 galaxy. These 1.3 mm wavelength observat…
orvara: An Efficient Code to Fit Orbits using Radial Velocity, Absolute, and/or Relative Astrometry
Timothy D. Brandt, Trent J. Dupuy, Yiting Li +5
We present an open-source Python package, Orbits from Radial Velocity, Absolute, and/or Relative Astrometry (orvara), to fit Keplerian orbits to any combination of radial velocity,…
Constraints on CDM Extensions from the SPT-3G 2018 and Power Spectra
L. Balkenhol, D. Dutcher, P. A. R. Ade +117
We present constraints on extensions to the CDM cosmological model from measurements of the -mode polarization auto-power spectrum and the temperature--mode cross-power sp…
Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model
J. Montgomery, P. A. R. Ade, Z. Ahmed +118
The third generation South Pole Telescope camera (SPT-3G) improves upon its predecessor (SPTpol) by an order of magnitude increase in detectors on the focal plane. The technology u…
Detection of Galactic and Extragalactic Millimeter-Wavelength Transient Sources with SPT-3G
S. Guns, A. Foster, C. Daley +119
High-angular-resolution cosmic microwave background experiments provide a unique opportunity to conduct a survey of time-variable sources at millimeter wavelengths, a population wh…
Measurements of the E-Mode Polarization and Temperature-E-Mode Correlation of the CMB from SPT-3G 2018 Data
D. Dutcher, L. Balkenhol, P. A. R. Ade +118
We present measurements of the -mode () polarization power spectrum and temperature--mode () cross-power spectrum of the cosmic microwave background using data collec…
Gaia Early Data Release 3: Structure and properties of the Magellanic Clouds
Gaia Collaboration, X. Luri, L. Chemin +417
We compare the Gaia DR2 and Gaia EDR3 performances in the study of the Magellanic Clouds and show the clear improvements in precision and accuracy in the new release. We also show…
Gaia Early Data Release 3: The Galactic anticentre
Gaia Collaboration, T. Antoja, P. McMillan +417
We aim to demonstrate the scientific potential of the Gaia Early Data Release 3 (EDR3) for the study of the Milky Way structure and evolution. We used astrometric positions, proper…