Results 1 to 10 of about 114 (114)
A Catalog of Nearby Accelerating Star Candidates in Gaia DR3
The Astronomical Journal, 2023 We describe a new catalog of accelerating star candidates with Gaia G ≤ 17.5 mag and distances d ≤ 100 pc. Designated as the Gaia Nearby Accelerating Star Catalog (GNASC), it contains 29,684 members identified using a supervised machine-learning ...
Marc L. Whiting +3 more
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Spinning up the Surface: Evidence for Planetary Engulfment or Unexpected Angular Momentum Transport?
The Astrophysical Journal, 2022 In this paper, we report the potential detection of a nonmonotonic radial rotation profile in a low-mass lower-luminosity giant star. For most low- and intermediate-mass stars, the rotation on the main sequence seems to be close to rigid.
Jamie Tayar +17 more
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The Astronomical Journal, 2023 The Subaru telescope is currently performing a strategic program (SSP) using the high-precision near-infrared (NIR) spectrometer IRD to search for exoplanets around nearby mid/late M dwarfs via radial velocity (RV) monitoring.
Taichi Uyama +34 more
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The Astronomical Journal, 2023 Benchmark brown dwarf companions with well-determined ages and model-independent masses are powerful tools to test substellar evolutionary models and probe the formation of giant planets and brown dwarfs.
Kyle Franson +30 more
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The Astronomical Journal, 2023 While secondary mass inferences based on single-lined spectroscopic binary (SB1) solutions are subject to $\sin i$ degeneracies, this degeneracy can be lifted through the observations of eclipses.
Stephen P. Schmidt +20 more
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Statistics on the population of distant substellar companions to nearby stars
Astronomy & AstrophysicsContext. Wide substellar companions to stars provide valuable benchmarks for investigating the formation and evolutionary pathways of brown dwarfs and giant planets far beyond the extent of protoplanetary discs.
Ouedraogo Souleymane +7 more
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Predicted incidence of Jupiter-like planets around white dwarfs
Astronomy & AstrophysicsContext. Gas-giant planets and brown dwarfs have been discovered in large numbers around main-sequence stars and even evolved stars. In contrast, and despite ongoing imaging surveys using state-of-the-art facilities, only a handful of substellar ...
Mauch-Soriano Alex +9 more
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Testing the Interaction between a Substellar Companion and a Debris Disk in the HR 2562 System
The Astronomical Journal, 2023 The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk.
Stella Yimiao Zhang +53 more
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The Astronomical JournalDirectly imaged substellar companions with well-constrained ages and masses serve as vital empirical benchmarks for planet formation and evolution models. Potential benchmark companions can be identified from astrometric accelerations of their host stars.
Anne E. Peck +16 more
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JWST/NIRSpec Observations of the Planetary Mass Companion TWA 27B
The Astrophysical Journal Letters, 2023 We present 1–5 μ m spectroscopy of the young planetary mass companion TWA 27B (2M1207B) performed with NIRSpec on board the James Webb Space Telescope. In these data, the fundamental band of CH _4 is absent, and the fundamental band of CO is weak.
K. L. Luhman +10 more
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