Results 101 to 110 of about 22,040,331 (192)
, 2017 International audienceThe survey of the mid-infrared sky by the Wide-field Infrared Survey Explorer (WISE) led to the discovery of Twenty-four Y dwarfs are known at the time of writing.
Esplin, T. +9 more
core +1 more source
, 2018 “Free-floating, non-deuterium-burning, substellar objects” are isolated bodies of a few Jupiter masses found in very young open clusters and associations, nearby young moving groups, and in the immediate vicinity of the Sun. They are neither brown dwarfs
Caballero, J. A. +2 more
core +1 more source
Intermediate Resolution Near-Infrared Spectroscopy of 36 late-M Dwarfs [PDF]
, 2012 We present observations of 36 late-M dwarfs obtained with the KeckII/NIRSPEC in the J-band at a resolution of ∼20,000. We have measured projected rotational velocities, absolute radial velocities, and pseudo-equivalent widths of atomic lines.
Carlos del Burgo Díaz
core +2 more sources
UNCOVER: JWST Spectroscopy of Three Cold Brown Dwarfs at Kiloparsec-scale Distances
The Astrophysical JournalWe report JWST/NIRSpec spectra of three distant T-type brown dwarfs identified in the Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (UNCOVER) survey of the Abell 2744 lensing field.
Adam J. Burgasser +21 more
doaj +1 more source
Y Dwarfs: The Challenge of Discovering the Coldest Substellar Population in the Solar Neighborhood
, 2018 To be published in: Handbook of Exoplanets, 2nd Edition, Hans Deeg and Juan Antonio Belmonte (Eds.
openaire +2 more sources
NEAR-INFRARED IMAGING OF WHITE DWARFS WITH CANDIDATE DEBRIS DISKS
, 2014 We have carried out JHK(s) imaging of 12 white dwarf debris disk candidates from the WIRED Sloan Digital Sky Survey Data Release 7 catalog, aiming to confirm or rule out disks among these sources.
Wang, Zhongxiang +2 more
core
M, L and T dwarfs in the J-PLUS Survey
, 2017 A deep and wide sky survey such as J-PLUS will image thousands of M dwarfs, hundreds of L dwarfs, and tens of T dwarfs. M dwarfs are now ideal targets for habitable exoplanet searches, L dwarfs are a main contributor to the mass function in the solar ...
José Antonio Caballero +1 more
core +1 more source
, 2020 . Few variable White Dwarfs and nuclei of Planetary Nebulae are known, whose pulsational properties may be used to check the reliability of stellar evolution theory.
O Straniero +4 more
core
Protosolar D-to-H Abundance and One Part per Billion PH3 in the Coldest Brown Dwarf
The Astrophysical Journal LettersThe coldest Y spectral type brown dwarfs are similar in mass and temperature to cool and warm (∼200–400 K) giant exoplanets. We can therefore use their atmospheres as proxies for planetary atmospheres, testing our understanding of physics and chemistry ...
Melanie J. Rowland +26 more
doaj +1 more source
Characterizing Low-mass Stars and Brown Dwarfs and Upgrading NIRSPEC [PDF]
, 2018 This dissertation combines near-infrared spectroscopic and astrometric analysis of low-mass stars and brown dwarfs with instrumentation work to upgrade the NIRSPEC spectrometer for the Keck II Telescope.
Martin, Emily
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