Results 41 to 50 of about 238,136 (265)
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
Detached white-dwarf close-binary stars -- CV's extended family [PDF]
, 1999 I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15 white dwarf/white dwarf systems and 22 white dwarf/M dwarf systems.
arxiv +1 more source
Flexible 3D‐Printed Cellulosic Constructs for EMI Shielding and Piezoresistive Sensing
Advanced Materials Technologies, EarlyView.This study presents a method for fabricating lightweight, conductive, and compressible 3D‐printed structures from CNFs. By using ion‐seeded 3D printing and cold chemical vapor polymerization, PEDOT/CNF frameworks with electrical conductivity and compressibility are produced.
Majed Amini +6 more
wiley +1 more source
Mid-infrared followup of cold brown dwarfs: Diversity in age, mass and metallicity
EPJ Web of Conferences, 2011 We use Spitzer IRAC 3.6–8.0 μm photometry of late-type T dwarfs to investigate various trends which can aid the planning and interpretation of infrared (IR) surveys for the coldest T or Y dwarfs. Brown dwarfs with effective temperature (Teff)50% of their
Pinfield D.J. +7 more
doaj +1 more source
An Infrared High Proper Motion Survey Using 2MASS and SDSS: Discovery of M, L and T Dwarfs [PDF]
, 2008 A search of the Two Micron All Sky Survey and Sloan Digital Sky Survey reveals 36 previously unknown high proper motion objects with J<17. Their red-optical colors indicate that 27 are M dwarfs, 8 are early-type L dwarfs, and 1 is a late-type T dwarf.
arxiv +1 more source
SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition [PDF]
Astrophys.J.710:1142-1169,2010, 2009 We report the identification of 17 candidate brown dwarf binaries whose components straddle the L dwarf/T dwarf transition. These sources were culled from a large near-infrared spectral sample of L and T dwarfs observed with the Infrared Telescope Facility SpeX spectrograph. Candidates were selected on the basis of spectral ratios which segregate known
arxiv +1 more source
Advanced Photonics Research, EarlyView.The necessity and feasibility of enhancing light outcoupling in perovskite light‐emitting diodes (PeLEDs) is highlighted. On near‐IR PeLEDs, low‐cost, micro‐textured light management (LM) foils demonstrate boost in light extraction. Optimizing perovskite thickness and the optical cavity in synergy with LM foils is crucial for maximizing performance ...
Milan Kovačič +3 more
wiley +1 more source
Brain and Behavior, Volume 12, Issue 12, December 2022., 2022 Graphical Abstract Paired‐samples t‐tests showed that after exercise, subjects displayed increased reading speed and fewer eye drifts, coupled with increased mean scores. This study demonstrated that running, an acute, coordinative, aerobic exercise, improves attention and increases the testing performance of the SAT reading.
Jeffrey Huang +3 more
wiley +1 more source
Eight New Substellar Hyades Candidates from the UKIRT Hemisphere Survey
The Astronomical JournalWe have used the UKIRT Hemisphere Survey combined with the UKIDSS Galactic Cluster Survey, the UKIDSS Galactic Plane Survey, and the CatWISE2020 catalog to search for new substellar members of the nearest open cluster to the Sun, the Hyades.
Adam C. Schneider +18 more
doaj +1 more source
Infrared Photometry of Late-M, L, and T Dwarfs [PDF]
Astrophys.J. 564 (2002) 452, 2001 We present ZJHKL'M' photometry of a sample of 58 late-M, L, and T dwarfs, most of which are identified from the Sloan Digital Sky Survey and the Two Micron All-Sky Survey. Near-infrared spectra and spectral classifications for most of this sample are presented in a companion paper by Geballe et al.
arxiv +1 more source