Navegação Ciências Exatas e da Terra por Assunto "Brown dwarfs"
Resultados 1-8 de 8
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Brown dwarf census with the Dark Energy Survey year 3 data and thethin disc scale height of early L types
(2019) [Artigo de periódico]In this paper we present a catalogue of 11 745 brown dwarfs with spectral types rangingfrom L0 to T9, photometrically classified using data from the Dark Energy Survey (DES)year 3 release matched to the Vista Hemisphere ... -
A cautionary tale : marvels brown dwarf candidate reveals itself to be a very long period, highly eccentric spectroscopic stellar binary
(2013) [Artigo de periódico]We report the discovery of a highly eccentric, double-lined spectroscopic binary star system (TYC 3010-1494-1), comprising two solar-type stars that we had initially identified as a single star with a brown dwarf companion. ... -
Exploring the brown dwarf desert : new substellar companions from the SDSS-III MARVELS survey
(2017) [Artigo de periódico]Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ∼5 au in the mass range of ∼10–80 MJup. This deficit, known as the brown dwarf desert, currently has no conclusive ... -
Increasing the census of ultracool dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data
(2020) [Artigo de periódico]We present the discovery of 255 binary and 6 multiple system candidates with wide (> 5 arcsec) separation composed by ultracool dwarfs (UCDs) companions to stars, plus nine double ultracool dwarf systems. These systems ... -
Marvels-1 : a face-on double-lined binary star masquerading as a resonant planetary system and consideration of rare false positives in radial velocity planet searches
(2013) [Artigo de periódico]We have analyzed new and previously published radial velocity (RV) observations of MARVELS-1, known to have an ostensibly substellar companion in a ∼6 day orbit. We find significant (∼100ms-ˡ) residuals to the best-fit ... -
Very low mass stellar and substellar companions to solar-like stars from MARVELS. IV. A candidate bronw dwarf or low-mass stellar companion HIP 67526
(2013) [Artigo de periódico]We report the discovery of a candidate brown dwarf (BD) or a very low mass stellar companion (MARVELS-5b) to the star HIP 67526 from the Multi-object Apache point observatory Radial Velocity Exoplanet Large-area Survey ... -
Very low mass stellar and substellar companions to solar-like stars from MARVELS. V. A low eccentricity brown dwarf from the driest part of the desert, marvels-6b
(2013) [Artigo de periódico]We describe the discovery of a likely brown dwarf (BD) companion with a minimum mass of 31.7 ± 2.0 MJup to GSC 03546-01452 from the MARVELS radial velocity survey, which we designate as MARVELS-6b. For reasonable priors, ... -
Very-low-mass stellar and substellar companion to solar-like stars from MARVELS. III. A short-period brown dwarf cadidate around an active G0IV subgiant
(2013) [Artigo de periódico]We present an eccentric, short-period brown dwarf candidate orbiting the active, slightly evolved subgiant star TYC 2087-00255-1, which has effective temperature Teff = 5903±42 K, surface gravity log(g) = 4.07±0.16 (cgs), ...