Results 41 to 50 of about 222,937 (306)
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
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
openaire +3 more sources
Structurally Defined Water‐Soluble Metallofullerene Derivatives towards Biomedical Applications
Angewandte Chemie International Edition, Volume 62, Issue 3, January 16, 2023., 2023 A modular metallobuckytrio (MBT) platform provides a family of structurally defined, water‐soluble metallofullerene derivatives that can safely carry rare‐earth elements in tailorable molecules, showing promise in biomedicines including MRI contrast agents and photosensitizers. Abstract Endohedral metallofullerenes (EMFs) are excellent carriers of rare‐
Yanbang Li +15 more
wiley +1 more source
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
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
openaire +2 more sources
Popular political attitudes in Samoa: Findings of the Pacific Attitudes Survey
Asia &the Pacific Policy Studies, Volume 9, Issue 3, Page 408-429, September 2022., 2022 Abstract Popular political attitudes surveys have been conducted globally for several decades, but the Pacific region remains an exception. This paper presents the findings of the first Pacific Attitudes Survey (PAS), conducted in Samoa from December 2020‐January 2021.
Michael Leach +9 more
wiley +1 more source
SDSS J080531.84+481233.0: An Unresolved L Dwarf/T Dwarf Binary [PDF]
The Astronomical Journal, 2007 SDSS J080531.84+481233.0 is a peculiar L-type dwarf that exhibits unusually blue near-infrared and mid-infrared colors and divergent optical (L4) and near-infrared (L9.5) spectral classifications. These peculiar spectral traits have been variously attributed to condensate cloud effects or subsolar metallicity.
Adam J. Burgasser, Adam J. Burgasser
openaire +3 more sources
Embryonic cranial cartilage defects in the Fgfr3Y367C/+ mouse model of achondroplasia
The Anatomical Record, EarlyView., 2023 Abstract Achondroplasia, the most common chondrodysplasia in humans, is caused by one of two gain of function mutations localized in the transmembrane domain of fibroblast growth factor receptor 3 (FGFR3) leading to constitutive activation of FGFR3 and subsequent growth plate cartilage and bone defects.
Susan M. Motch Perrine +9 more
wiley +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
openaire +2 more sources
L and T dwarfs in the Hyades and Ursa Major moving groups [PDF]
Mon.Not.Roy.Astron.Soc.Lett.378:L24-L28,2007, 2007 We have used the moving cluster method to identify three L dwarfs and one T dwarf in the Ursa Major/Sirius moving group (age 400 Myr). Five L dwarfs and two T dwarfs are found to belong to the Hyades moving group (age 625 Myr). These L and T dwarfs define 400- and 625- Myr empirical isochrones, assuming that they have the same age.
arxiv +1 more source