Results 101 to 110 of about 15,774,260 (349)
The Astrophysical JournalWe report the results of a spectroscopic survey of candidate T subdwarfs identified by the Backyard Worlds: Planet 9 program. Near-infrared spectra of 31 sources with red J − W2 colors and large J -band reduced proper motions show varying signatures of ...
Adam J. Burgasser +36 more
doaj +1 more source
Constraining the Distribution of L and T Dwarfs in the Galaxy
The Astrophysical Journal, 2005 We estimate the thin disk scale height of the Galactic population of L- & T-dwarfs based on star counts from 15 deep parallel fields from the Hubble Space Telescope. From these observations, we have identified 28 candidate L- & T- dwarfs based on their (i'-z') color and morphology.
Ryan Jr., Russell E. +3 more
openaire +2 more sources
L and T Dwarf Models and the L to T Transition [PDF]
The Astrophysical Journal, 2006 accepted to the Astrophysical Journal, 21 figures (20 in color); spectral models in electronic form available at http://zenith.as.arizona.edu ...
Burrows, Adam +2 more
openaire +2 more sources
The Most Dark-Matter-dominated Galaxies: Predicted Gamma-Ray Signals from the Faintest Milky Way Dwarfs [PDF]
, 2007 We use kinematic data from three new nearby, extremely low luminosity Milky Way dwarf galaxies (Ursa Major II, Willman 1, and Coma Berenices) to constrain the properties of their dark matter halos, and from these we make predictions for the γ-ray flux ...
L. Strigari +6 more
semanticscholar +1 more source
Adult Sex Ratio as a Demographic Feedback Linking Mating Systems, Parental Care, and Evolution
Advanced Science, EarlyView.Breeding systems are some of the most diverse social behavior, and our team is investigation the evolutionary causes of this diversity. This review summarises our research carried out at the University of Bath. We argue that demographic components of wild populations, especially the adult sex ratio, plays a key role driving breeding system variation ...
Tamás Székely, Oscar G. Miranda
wiley +1 more source
The Astrophysical JournalWe examine the positions of substellar objects in mid-infrared color–magnitude and color–color diagrams to distinguish between cloudy and cloud-free atmospheres.
Jolie L’Heureux +6 more
doaj +1 more source
MEASURING TINY MASS ACCRETION RATES ONTO YOUNG BROWN DWARFS [PDF]
, 2009 We present low-resolution Keck I/LRIS spectra spanning from 3200 to 9000 Å of nine young brown dwarfs and three low-mass stars in the TW Hya Association and in Upper Sco. The optical spectral types of the brown dwarfs range from M5.5 to M8.75, though two
G. Herczeg, K. Cruz, L. Hillenbrand
semanticscholar +1 more source
Advanced Science, EarlyView.TaMYB7‐A1 directly activates TaABI5 to enhance ABA signaling and regulate ABA‐GA homeostasis, enforcing seed dormancy. Its superior allele, derived from wild einkorn introgression, harbors a MITE insertion that elevates expression and two amino acid substitutions that enhance transcriptional activity, collectively generating graded PHS resistance for ...
Hao Wang +18 more
wiley +1 more source
Three Brown Dwarfs Masquerading as High-redshift Galaxies in JWST Observations
The Astrophysical JournalWe report the spectroscopic identification of three brown dwarf candidates—o005_s41280, o006_s00089, and o006_s35616—discovered in RUBIES using James Webb Space Telescope (JWST) Near-Infrared Spectrograph PRISM/CLEAR spectroscopy.
Zhijun Tu +3 more
doaj +1 more source
, 2017 Variability has now been robustly observed in a range of L and T type field brown dwarfs, primarily at near-IR and mid-IR wavelengths. The probable cause of this variability is surface inhomogeneities in the clouds of these objects (although other ...
B. Biller
semanticscholar +1 more source