Results 51 to 60 of about 4,018,158 (274)
Orbital Motion of the Wide Planetary-mass Companion GSC 6214-210 b: No Evidence for Dynamical Scattering [PDF]
Astronomical Journal, 2018 Direct-imaging exoplanet surveys have discovered a class of 5–20 substellar companions at separations >100 au from their host stars, which present a challenge to planet and star formation models.
L. Pearce +7 more
semanticscholar +1 more source
2MASS J13243553+6358281 Is an Early T-type Planetary-mass Object in the AB Doradus Moving Group [PDF]
, 2018 We present new radial velocity and trigonometric distance measurements indicating that the unusually red and photometrically variable T2 dwarf 2MASS J13243553+6358281 is a member of the young (∼150 Myr) AB Doradus moving group (ABDMG) based on its space ...
J. Gagn'e +5 more
semanticscholar +1 more source
Estimating Planetary Mass with Deep Learning [PDF]
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 +1 more source
A high-mass Planetary Nebula in a Galactic Open Cluster [PDF]
, 2019 Planetary Nebulae are the ionised ejected envelopes surrounding the remnant cores of dying stars. Theory predicts that main-sequence stars with one to about eight times the mass of our sun may eventually form planetary nebulae. Until now no example has been confirmed at the higher mass range.
arxiv +1 more source
Constraints on the spin evolution of young planetary-mass companions [PDF]
, 2017 Surveys of young star-forming regions have discovered a growing population of planetary-mass (
M. Bryan +4 more
semanticscholar +1 more source
Planetary formation and early phases
Comptes Rendus. Physique, 2023 Planets form in proto-planetary disks. In this review, we describe the structure and properties of such disks, and the various phenomenons that lead to the final product: a planetary system. First, micrometre dust settles and coagulates.
Crida, Aurélien
doaj +1 more source
Dynamical evolution of a young planetary system: stellar flybys in co-planar orbital configuration [PDF]
, 2020 Stellar flybys in star clusters may perturb the evolution of young planetary systems in terms of disk truncation, planetary migration and planetary mass accretion. We investigate the feedback of a young planetary system during a single close stellar encounter in a typical open young stellar cluster. We consider 5 masses for the stellar perturbers: 0.5,
arxiv +1 more source
The similarity of multi-planet systems [PDF]
, 2021 Previous studies using Kepler data suggest that planets orbiting the same star tend to have similar sizes. However, due to the faintness of the stars, only a few of the planets were also detected with radial velocity follow-ups, and therefore the planetary masses were mostly unknown.
arxiv +1 more source
Environment International, 2021 Biomass burning (BB) is an important source of primary organic aerosols (POA). These POA contain a significant fraction of semivolatile organic compounds, and can release them into the gas phase during the dilution process in transport.
Zheng Fang +14 more
doaj
Two empirical regimes of the planetary mass-radius relation [PDF]
, 2017 Today, with the large number of detected exoplanets and improved measurements, we can reach the next step of planetary characterization. Classifying different populations of planets is not only important for our understanding of the demographics of ...
D. Bashi +3 more
semanticscholar +1 more source