Results 21 to 30 of about 49,023 (273)
Searching for chemical signatures of brown dwarf formation [PDF]
A&A 602, A38 (2017), 2017 Recent studies have shown that close-in brown dwarfs in the mass range 35-55 M$_{\rm Jup}$ are almost depleted as companions to stars, suggesting that objects with masses above and below this gap might have different formation mechanisms. We determine the fundamental stellar parameters, as well as individual abundances for a large sample of stars known
arxiv +1 more source
HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star
The Astronomical Journal, 2023 We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B star, discovered by NASA's Transiting Exoplanet Survey Satellite as TOI-588 b. HIP 33609 b is a large ( R _b = ${1.580}_{-0.070}^{+0.074}$ R _J )
Noah Vowell +44 more
doaj +1 more source
Brown dwarfs forming in discs: Where to look for them?
EPJ Web of Conferences, 2011 A large fraction of the observed brown dwarfs may form by gravitational fragmentation of unstable discs. This model reproduces the brown dwarf desert, and provides an explanation for the existence of planetary-mass objects and for the binary properties ...
Stamatellos D., Whitworth A.
doaj +1 more source
Tectonics, Volume 41, Issue 12, December 2022., 2022 Abstract Orogenic wedges are common at convergent plate margins and deform internally to maintain a self‐similar geometry during growth. New structural mapping and thermochronometry data illustrate that the eastern Greater Caucasus mountain range of western Asia undergoes deformation via distinct mechanisms that correspond with contrasting lithologies ...
A. R. Tye +4 more
wiley +1 more source
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
doaj +1 more source
JWST/NIRCam Discovery of the First Y+Y Brown Dwarf Binary: WISE J033605.05–014350.4
The Astrophysical Journal Letters, 2023 We report the discovery of the first brown dwarf binary system with a Y dwarf primary, WISE J033605.05−014350.4, observed with NIRCam on JWST with the F150W and F480M filters.
Per Calissendorff +27 more
doaj +1 more source
Brown dwarfs in retrogradely precessing cataclysmic variables?
EPJ Web of Conferences, 2011 We compare Smoothed Particle Hydrodynamic simulations of retrogradely precessing accretion disks that have a white dwarf primary and a main sequence secondary with observational data and with theory on retrograde precession via tidal torques like those ...
Martin E.L. +2 more
doaj +1 more source
The one that got away: a unique eclipse in the young brown dwarf Roque 12
The Open Journal of Astrophysics, 2020 We report the discovery of a deep, singular eclipse of the bona fide brown dwarf Roque 12, a substellar member of the Pleiades. The eclipse was 0.6mag deep, lasted 1.3h, and was observed with two telescopes simultaneously in October 2002.
Aleks Scholz +3 more
doaj +1 more source
Statistical Properties of Brown Dwarf Companions: Implications for Different Formation Mechanisms [PDF]
, 2013 The mass domain where massive extrasolar planets and brown dwarfs overlap is still poorly understood due to the paucity of brown dwarfs orbiting close to solar-type stars, the so-called brown dwarf desert. In this paper we collect all of available data about close brown dwarfs around solar type stars and their host stars from literature and study the ...
arxiv +1 more source
Mass Production of 2021 KMTNet Microlensing Planets. III. Analysis of Three Giant Planets
The Astronomical Journal, 2022 We present the analysis of three more planets from the KMTNet 2021 microlensing season. KMT-2021-BLG-0119Lb is a ∼6 M _Jup planet orbiting an early M dwarf or a K dwarf, KMT-2021-BLG-0192Lb is a ∼2 M _Nep planet orbiting an M dwarf, and KMT-2021-BLG ...
In-Gu Shin +50 more
doaj +1 more source