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VLTI/GRAVITY Provides Evidence the Young, Substellar Companion HD 136164 Ab formed like a "Failed Star"
William O. Balmer, L. Pueyo, S. Lacour +93
Young, low-mass Brown Dwarfs orbiting early-type stars, with low mass ratios (), appear intrinsically rare and present a formation dilemma: could a handful of these…
First VLTI/GRAVITY Observations of HIP 65426 b: Evidence for a Low or Moderate Orbital Eccentricity
S. Blunt, W. O. Balmer, J. J. Wang +95
Giant exoplanets have been directly imaged over orders of magnitude of orbital separations, prompting theoretical and observational investigations of their formation pathways. In t…
The Comprehensive Archive of Substellar and Planetary Accretion Rates
S. K. Betti, K. B. Follette, K. Ward-Duong +11
Accretion rates () of young stars show a strong correlation with object mass (); however, extension of the relation into the substellar regime is less certa…
VLTI/GRAVITY Observations and Characterization of the Brown Dwarf Companion HD 72946 B
W. O. Balmer, L. Pueyo, T. Stolker +96
Tension remains between the observed and modeled properties of substellar objects, but objects in binary orbits, with known dynamical masses can provide a way forward. HD 72946 B i…
An imaged 15Mjup companion within a hierarchical quadruple system
A. Chomez, V. Squicciarini, A. -M. Lagrange +20
Since 2019, the direct imaging B-star Exoplanet Abundance Study (BEAST) at SPHERE@VLT has been scanning the surroundings of young B-type stars in order to ascertain the ultimate fr…
The Planetary Accretion Shock. III. Smoothing-free 2.5D simulations and calculation of H alpha emission
Gabriel-Dominique Marleau, Rolf Kuiper, William Béthune +1
Surveys have looked for H alpha emission from accreting gas giants but found very few objects. Analyses of the detections and non-detections have assumed that the entire gas flow f…
Planetary line-to-accretion luminosity scaling relations: Extrapolating to higher-order hydrogen lines
Gabriel-Dominique Marleau, Yuhiko Aoyama
Aoyama et al. (2021, ApJL) provided scaling relations between hydrogen-line luminosities and the accretion luminosity for planetary-mass objects. These fits should be an improvemen…
Forbidden emission lines in protostellar outflows and jets with MUSE
Lizxandra Flores-Rivera, Mario Flock, Nicolás Kurtovic +14
Forbidden emission lines in protoplanetary disks are a key diagnostic in studies of the evolution of the disk and the host star. We report spatially resolved emission lines, [OI] 6…