Results 41 to 50 of about 113,078 (269)
SPECTRAL VARIABILITY FROM THE PATCHY ATMOSPHERES OF T AND Y DWARFS [PDF]
The Astrophysical Journal, 2014 Brown dwarfs of a variety of spectral types have been observed to be photometrically variable. Previous studies have focused on objects at the L/T transition, where the iron and silicate clouds in L dwarfs break up or dissipate. However, objects outside of this transitional effective temperature regime also exhibit variability.
Morley, Caroline V +3 more
openaire +4 more sources
DEEPz-BAND OBSERVATIONS OF THE COOLEST Y DWARF [PDF]
The Astrophysical Journal, 2014 WISE J085510.83-071442.5 (hereafter, WISE 0855-07) is the coolest Y dwarf known to date and is located at a distance of 2.31$\pm 0.08$ pc, giving it the fourth largest parallax of any known star or brown dwarf system. We report deep $z$-band observations of WISE 0855-07 using FORS2 on UT1/VLT. We do not detect any counterpart to WISE 0855-07 in our $z$-
Derek Kopon +12 more
openaire +4 more sources
Keck NIRES Spectral Standards for L, T, and Y Dwarfs
Research Notes of the AAS, 2022 Abstract We present medium-resolution (λ/Δλ = 2700), near-infrared spectral standards for field L0–L2, L4, and L7–Y0 dwarfs obtained with the Near-Infrared Echellette Spectrometer on the Keck II 10 m telescope. These standards allow for detailed spectral comparative analysis of cold brown dwarfs discovered through ongoing ground-based ...
Christopher A. Theissen +16 more
openaire +3 more sources
Romiplostim use in pregnant women with immune thrombocytopenia
American Journal of Hematology, Volume 98, Issue 1, Page 31-40, January 2023., 2023 Abstract Treatment for immune thrombocytopenia (ITP) in pregnancy is hampered by the lack of fetal safety evidence of maternally‐administered medications. The Pregnancy Surveillance Program (PSP) collected patient information from 2017–2020 for pregnancy, birth outcomes, and adverse events (AEs) for 186 women exposed to romiplostim from 20 days before ...
James B. Bussel +7 more
wiley +1 more source
American Journal of Human Biology, Volume 34, Issue 12, December 2022., 2022 Abstract Objectives This study examines the associations between water insecurity, self‐reported physical health, and objective measures of biological health among 225 Awajún adults (107 women; 118 men) living in the Peruvian Amazon, a “water‐abundant” region.
Paula Skye Tallman +3 more
wiley +1 more source
Y Dwarf Trigonometric Parallaxes from the Spitzer Space Telescope [PDF]
The Astrophysical Journal, 2018 Abstract Y dwarfs provide a unique opportunity to study free-floating objects with masses <30 M Jup and atmospheric temperatures approaching those of known Jupiter-like exoplanets. Obtaining distances to these objects is an essential step toward characterizing their absolute physical properties.
Emily C. Martin +14 more
openaire +6 more sources
Microphysics of Water Clouds in the Atmospheres of Y Dwarfs and Temperate Giant Planets
The Astrophysical Journal, 2022 Abstract Water clouds are expected to form on Y dwarfs and giant planets with equilibrium temperatures near or below that of Earth, drastically altering their atmospheric compositions and their albedos and thermal emission spectra.
James Mang +6 more
openaire +4 more sources
New Y and T Dwarfs from WISE Identified by Methane Imaging* † [PDF]
The Astrophysical Journal Supplement Series, 2018 Abstract We identify new Y- and T-type brown dwarfs from the WISE All Sky data release using images obtained in filters that divide the traditional near-infrared H and J bands into two halves—specifically and CH4l in the H and J2, and J3 in the J.
C. G. Tinney +8 more
openaire +5 more sources
The Occurrence Rate of Quiescent Radio Emission for Ultracool Dwarfs using a Generalized Semi-Analytical Bayesian Framework [PDF]
, 2023 We present a generalized analytical Bayesian framework for calculating the occurrence rate of steady emission (or absorption) in astrophysical objects. As a proof-of-concept, we apply this framework to non-flaring quiescent radio emission in ultracool ($\leq$ M7) dwarfs.
arxiv +1 more source