The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256–1257 b [PDF]
The Astrophysical Journal Letters, 2023 We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a
Brittany E. Miles +110 more
doaj +4 more sources
Effects of Planetary Mass Uncertainties on the Interpretation of the Reflectance Spectra of Earth-like Exoplanets [PDF]
The Astronomical JournalAtmospheric characterization of Earth-like exoplanets through reflected light spectroscopy is a key goal for upcoming direct imaging missions. A critical challenge in this endeavor is the accurate determination of planetary mass, which may influence the ...
Mario Damiano +4 more
doaj +2 more sources
Planetary mass–radius relations across the galaxy [PDF]
Astronomy & Astrophysics, 2020 Context. Planet formation theory suggests that planet bulk compositions are likely to reflect the chemical abundance ratios of their host star’s photosphere.
A. Michel +3 more
semanticscholar +4 more sources
Obliquity Constraints on an Extrasolar Planetary-mass Companion [PDF]
The Astronomical Journal, 2020 We place the first constraints on the obliquity of a planetary-mass companion outside of the solar system. Our target is the directly imaged system 2MASS J01225093–2439505 (2M0122), which consists of a 120 Myr 0.4 M⊙ star hosting a 12–27 MJ companion at ...
M. Bryan +10 more
semanticscholar +5 more sources
Cloud Atlas: Rotational Spectral Modulations and Potential Sulfide Clouds in the Planetary-mass, Late T-type Companion Ross 458C [PDF]
Astrophysical Journal, 2019 Measurements of photometric variability at different wavelengths provide insights into the vertical cloud structure of brown dwarfs and planetary-mass objects.
Elena Manjavacas +13 more
openalex +3 more sources
Estimating Planetary Mass with Deep Learning [PDF]
The Astronomical Journal, 2019 While thousands of exoplanets have been confirmed, the known properties about individual discoveries remain sparse and depend on detection technique. To utilize more than a small section of the exoplanet data set, tools need to be developed to estimate ...
E. Tasker +2 more
semanticscholar +4 more sources
PSYM-WIDE: A Survey for Large-separation Planetary-mass Companions to Late Spectral Type Members of Young Moving Groups [PDF]
Astronomical Journal, 2017 We present the results of a direct imaging survey for very large separation (>100 au), low-mass companions around 95 nearby young K5–L5 stars and brown dwarfs.
Marie-Ève Naud +7 more
openalex +3 more sources
JWST/NIRSpec Observations of the Planetary Mass Companion TWA 27B [PDF]
Astrophysical Journal Letters, 2023 We present 1–5 μm 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 CH4 is absent, and the fundamental band of CO is weak.
K. Luhman +10 more
semanticscholar +1 more source
Gaia DR3 astrometric orbit determination with Markov chain Monte Carlo and genetic algorithms. Systems with stellar, sub-stellar, and planetary mass companions [PDF]
Astronomy & Astrophysics, 2022 Astrometric discovery of sub-stellar mass companions orbiting stars is exceedingly hard due to the required sub-milliarcsecond precision, limiting the application of this technique to only a few instruments on a target-per-target basis as well as the ...
B. Holl +10 more
semanticscholar +1 more source
Near-infrared Accretion Signatures from the Circumbinary Planetary-mass Companion Delorme 1 (AB)b [PDF]
Astrophysical Journal Letters, 2022 Accretion signatures from bound brown dwarf and protoplanetary companions provide evidence for ongoing planet formation, and accreting substellar objects have enabled new avenues to study the astrophysical mechanisms controlling the formation and ...
S. Betti +10 more
semanticscholar +1 more source