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Microarcsecond Astrometry: Science Highlights from Gaia
Brown, Anthony G. A.
Access to microarcsecond astrometry is now routine in the radio, infrared (IR), and optical domains. In particular, the publication of the second data release (Gaia DR2) from the Gaia mission made it possible for every astronomer to work with easily accessible, high-precision astrometry for 1.7 billion sources to twenty-first magnitude over the fu…
The first ALMA survey of protoplanetary discs at 3 mm: demographics of grain growth in the Lupus region
Guidi, G.; Testi, L.; Tazzari, M. +9 more
We present the first ALMA survey of protoplanetary discs at 3 mm, targeting 36 young stellar objects in the Lupus star-forming region with deep observations (sensitivity 20-50 $\mu$Jy beam-1) at ~0.35 arcsec resolution (~50 au). Building on previous ALMA surveys at 0.89 and 1.3 mm that observed the complete sample of Class II discs in L…
Gaia Early Data Release 3. Updated radial velocities from Gaia DR2
Smith, M.; Gosset, E.; Allende Prieto, C. +40 more
Context. Gaia's Early Third Data Release (EDR3) does not contain new radial velocities because these will be published in Gaia's full third data release (DR3), expected in the first half of 2022. To maximise the usefulness of EDR3, Gaia's second data release (DR2) sources (with radial velocities) are matched to EDR3 sources to allow their DR2 radi…
Speckle Observations of TESS Exoplanet Host Stars: Understanding the Binary Exoplanet Host Star Orbital Period Distribution
Howell, Steve B.; Winn, Joshua N.; Ciardi, David R. +5 more
We present high-resolution speckle interferometric imaging observations of TESS exoplanet host stars using the NN-EXPLORE Exoplanet and Stellar Speckle Imager instrument at the 3.5 m WIYN telescope. Eight TESS objects of interest that were originally discovered by Kepler were previously observed using the Differential Speckle Survey Instrument. Sp…
The MAGPI survey: Science goals, design, observing strategy, early results and theoretical framework
Fisher, D. B.; Peng, Y.; Gupta, A. +40 more
We present an overview of the Middle Ages Galaxy Properties with Integral Field Spectroscopy (MAGPI) survey, a Large Program on the European Southern Observatory Very Large Telescope. MAGPI is designed to study the physical drivers of galaxy transformation at a lookback time of 3-4 Gyr, during which the dynamical, morphological, and chemical prope…
An all-sky sample of intermediate- to high-mass OBA-type eclipsing binaries observed by TESS
Garcia, S.; De Ridder, J.; Aerts, C. +4 more
Context. Intermediate- to high-mass stars are the least numerous types of stars, and they are less well understood than their more numerous low-mass counterparts in terms of their internal physical processes. Modelling the photometric variability of a large sample of main-sequence intermediate- to high-mass stars in eclipsing binary systems will h…
Measurements of the Dust Properties in z ≃ 1-3 Submillimeter Galaxies with ALMA
Smail, I.; Brandt, W. N.; Weiss, A. +13 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) 2 mm continuum observations of a complete and unbiased sample of 99 870 µm selected submillimeter galaxies (SMGs) in the Extended Chandra Deep Field South (ALESS). Our observations of each SMG reach average sensitivities of 53 µJy beam-1. We measure the flux dens…
Multiphase feedback processes in the Sy2 galaxy NGC 5643
Rigopoulou, D.; Carrera, F. J.; García-Burillo, S. +11 more
We study the multiphase feedback processes in the central ∼3 kpc of the barred Seyfert 2 galaxy NGC 5643. We used observations of the cold molecular gas (ALMA CO(2-1) transition) and ionized gas (MUSE IFU optical emission lines). We studied different regions along the outflow zone, which extends out to ∼2.3 kpc in the same direction (east-west) as…
HOLISMOKES. VI. New galaxy-scale strong lens candidates from the HSC-SSP imaging survey
Suyu, S. H.; Cañameras, R.; Schuldt, S. +8 more
We have carried out a systematic search for galaxy-scale strong lenses in multiband imaging from the Hyper Suprime-Cam (HSC) survey. Our automated pipeline, based on realistic strong-lens simulations, deep neural network classification, and visual inspection, is aimed at efficiently selecting systems with wide image separations (Einstein radii θ
A More Precise Mass for GJ 1214 b and the Frequency of Multiplanet Systems Around Mid-M Dwarfs
Deming, Drake; Charbonneau, David; Cloutier, Ryan +2 more
We present an intensive effort to refine the mass and orbit of the enveloped terrestrial planet GJ 1214 b using 165 radial velocity (RV) measurements taken with the HARPS spectrograph over a period of 10 years. We conduct a joint analysis of the RVs with archival Spitzer/IRAC transits and measure a planetary mass and radius of 8.17 ± 0.43 M⊕<…