Results 31 to 40 of about 88,099 (243)

Atmospheres of brown dwarfs

open access: yesThe Astronomy and Astrophysics Review, 2014
Review accepted for publication by The A&A Review (Spinger), 13 Figures, 53 pages, 233 references (Figure 1 updated and typos corrected)
Helling, Christiane, Casewell, Sarah
openaire   +5 more sources

Outflows and disks of brown dwarfs with SMA, CARMA and ALMA

open access: yesEPJ Web of Conferences, 2013
Brown dwarfs are on the dividing line between planets and stars. Up to date, about 1,000 brown dwarfs, including the coolest known brown dwarfs with temperatures of ∼300 K as cool as the human body, have been discovered.
Tho Do D.   +4 more
doaj   +1 more source

JWST/NIRSpec Observations of the Coldest Known Brown Dwarf

open access: yesThe Astronomical Journal, 2023
We present 1–5 μ m spectroscopy of the coldest known brown dwarf, WISE J085510.83−071442.5 (WISE 0855), performed with the Near-Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST).
K. L. Luhman   +8 more
doaj   +1 more source

Where to find over-massive brown dwarfs: new benchmark systems for binary evolution [PDF]

open access: yes, 2021
Under the right conditions brown dwarfs that gain enough mass late in their lives to cross the hydrogen burning limit will not turn into low-mass stars, but rather remain essentially brown dwarf-like. While these objects, called either beige dwarfs or over-massive brown dwarfs, may exist in principle, it remains unclear exactly how they would form ...
arxiv   +1 more source

THE LUMINOSITIES OF THE COLDEST BROWN DWARFS [PDF]

open access: yesThe Astrophysical Journal, 2014
Accepted for publication in The Astrophysical Journal (Oct 2, 2014).
C. G. Tinney   +5 more
openaire   +4 more sources

Extending the Canada-France Brown Dwarf Survey to the near infrared

open access: yesEPJ Web of Conferences, 2011
We present the first results of the Canada-France Brown Dwarfs Survey-InfraRed, hereafter CFBDSIR, our near infrared extension to the optical wide field survey CFBDS.
Bertin E.   +8 more
doaj   +1 more source

Searching for chemical signatures of brown dwarf formation [PDF]

open access: yesA&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

An Investigation of New Brown Dwarf Spectral Binary Candidates From the Backyard Worlds: Planet 9 Citizen Science Initiative

open access: yesThe Astronomical Journal, 2023
We present three new brown dwarf spectral-binary candidates: CWISE J072708.09−360729.2, CWISE J103604.84−514424.4, and CWISE J134446.62−732053.9, discovered by citizen scientists through the Backyard Worlds: Planet 9 project.
Alexia Bravo   +11 more
doaj   +1 more source

Spatial differences between stars and brown dwarfs: a dynamical origin? [PDF]

open access: yes, 2014
We use $N$-body simulations to compare the evolution of spatial distributions of stars and brown dwarfs in young star-forming regions. We use three different diagnostics; the ratio of stars to brown dwarfs as a function of distance from the region's ...
Abt   +55 more
core   +1 more source

SMA and CARMA observations of young brown dwarfs in ρ Ophiuchi and Taurus

open access: yesEPJ Web of Conferences, 2011
Molecular outflows provide vital information about the earliest stages in the birth of stars, studying the molecular outflow properties is therefore crucial for understanding how stars form.
Lee C.-F., Ngoc P.-B., Ho P.
doaj   +1 more source

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