Results 31 to 40 of about 4,134 (286)
Photometric Variability at the L/T Dwarf Boundary [PDF]
The Astronomical Journal, 2003 29 pages including 11 figures, 4 tables; accepted for publication in ...
Enoch, Melissa L. +2 more
openaire +6 more sources
Devouring the Milky Way Satellites: Modeling Dwarf Galaxies with Galacticus
The Astrophysical Journal, 2023 Dwarf galaxies are ubiquitous throughout the universe and are extremely sensitive to various forms of internal and external feedback. Over the last two decades, the census of dwarf galaxies in the Local Group and beyond has increased markedly.
Sachi Weerasooriya +4 more
doaj +1 more source
A Focus on L Dwarfs with Trigonometric Parallaxes [PDF]
Publications of the Astronomical Society of the Pacific, 2018 11 pages, 14 eps ...
Y. Wang +8 more
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L Dwarfs and the Substellar Mass Function [PDF]
The Astrophysical Journal, 1999 This is a pre-published version which is collected from arXiv. The published version is at http://iopscience.iop.org/0004-637X/521/2/613/fulltext.
Reid, I. Neill +10 more
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A JWST Survey for Planetary Mass Brown Dwarfs in IC 348
The Astronomical Journal, 2023 We have obtained images of the center of the star-forming cluster IC 348 with the James Webb Space Telescope and have identified brown dwarf candidates based on their photometry and point-like flux profiles. Low-resolution spectroscopy has been performed
K. L. Luhman +7 more
doaj +1 more source
A Search for L Dwarf Binary Systems [PDF]
The Astronomical Journal, 2001 We present analysis of HST Planetary Camera images of twenty L dwarfs identified in the course of the Two Micron All-Sky Survey. Four of the targets have faint, red companions at separations between 0.07 and 0.29 arcseconds (1.6 to 7.6 AU). In three cases, the bolometric magnitudes of the components differ by less than 0.3 magnitudes. Since the cooling
J. Davy Kirkpatrick +3 more
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NICMOS Kernel-phase Interferometry. II. Demographics of Nearby Brown Dwarfs
The Astronomical Journal, 2023 Star formation theories have struggled to reproduce binary brown dwarf population demographics (e.g., frequency, separation, and mass ratio). Kernel-phase interferometry is sensitive to companions at separations inaccessible to classical imaging ...
Samuel M. Factor, Adam L. Kraus
doaj +1 more source
Architecture of dwarf shrubs and dwarf subshrubs of the genus of Thymus L. and Scutellaria L. (Lamiaceae) [PDF]
BIO Web of Conferences, 2021 The structure of 24 species of Thymus and 12 species of Scutellaria was studied using the architectural approach. For the first time, an architectural unit was described, it is a branched sympodial axis. The architectural unit consists of sympodial axes n+1 order, formation shoots, branching shoots, ephemerous shoots.
Alexandra Guseva +2 more
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The Astronomical Journal, 2023 Excess infrared flux from white dwarf stars is likely to arise from a dusty debris disk or a cool companion. In this work, we present near-infrared spectroscopic observations with Keck/MOSFIRE, Gemini/GNIRS, and Gemini/Flamingos-2 of seven white dwarfs ...
Dylan Owens +9 more
doaj +1 more source
L and T dwarfs in Gaia/SIM [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractWe discuss the role of distances for understanding brown dwarfs and estimate the contribution expected by Gaia. We show that Gaia will only observe 25% of L and T dwarfs within 50pc which, at a conservative estimate, amounts to less than 400 objects. We discuss how Gaia results will nevertheless aid the ground-based programs providing reliable,
Beatrice Bucciarelli +3 more
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