Results 61 to 70 of about 1,466 (265)

Diversity of Cold Worlds: A Near-complete Spectral Energy Distribution for 2MASS J04151954−0935066 Using JWST

The Astrophysical Journal
We present a near-complete spectral energy distribution (SED) for an extrasolar world: the T8 brown dwarf 2MASS J04151954−0935066. Spanning from optical to mid-infrared (0.7–20.4 μ m) wavelengths, the SED for this substellar atmosphere is constructed ...
Sherelyn Alejandro Merchan, Jacqueline K. Faherty, Genaro Suárez, Kelle L. Cruz, Adam J. Burgasser, Jonathan Gagné, Callie E. Hood, Eileen C. Gonzales, Daniella C. Bardalez Gagliuffi, Jolie L’Heureux, Johanna M. Vos, Adam C. Schneider, Aaron M. Meisner, Caroline Morley, J. Davy Kirkpatrick, Federico Marocco, Rocio Kiman, Charles A. Beichman, Ben Burningham, Dan Caselden, Peter R. Eisenhardt, Christopher R. Gelino, Ehsan Gharib-Nezhad, Marc J. Kuchner, Brianna Lacy, Austin Rothermich, Melanie J. Rowland, Niall Whiteford   +27 more
doaj   +1 more source

Increase in plant productivity in the tundra in Sweden is not related to increasing presence of warm‐adapted vascular plant species

Ecography, EarlyView.
Over the past decades, Arctic and alpine biomes have warmed faster than the global average. Substantial vegetation changes have been reported as a response to this warming, including increased productivity and the spread of warm‐adapted (thermophilic) species that are less resistant to grazing pressure into higher latitudes and altitudes.
Tim Horstkotte, Jakob Assmann, Henrik Hedenås, Signe Normand, Johan Olofsson   +4 more
wiley   +1 more source

On the Eccentricity Distribution and Tidal Evolution of Transiting Brown Dwarfs

The Astronomical Journal
Brown dwarfs on short-period orbits populate an intermediate regime between hot Jupiters and tight stellar binaries, lying at the intersection of possible evolutionary avenues.
Thiago Ferreira, Malena Rice
doaj   +1 more source

Brown dwarfs as Galactic chronometers [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractBrown dwarfs are natural clocks, cooling and dimming over time due to insufficient core fusion. They are also numerous and present in nearly all Galactic environments, making them potentially useful chronometers for a variety of Galactic studies.
openaire   +2 more sources

Topography constrains the climatic response of treeline migration in Taiwan's subalpine forests

Ecography, EarlyView.
Treelines are moving upslope, but the rates and drivers differ among different regions, globally. Many studies have examined the relationship between treeline movement and climate change, particularly rising temperature, while the role of topographical factors has received much less attention, despite the longstanding recognition of its importance.
Kuan‐Yu Chen, Jonathan Peereman, J. Aaron Hogan, Teng‐Chiu Lin   +3 more
wiley   +1 more source

JADES: An Abundance of Ultradistant T and Y Dwarfs in Deep Extragalactic Data

The Astrophysical Journal
Ultracool T ( T _eff  ≈ 500–1200 K) and Y dwarfs ( T _eff ⪅ 500 K) have historically been found only a few hundred parsecs from the Sun. The sensitivity and wavelength coverage of the NIRCam instrument on board the James Webb Space Telescope offer a ...
Kevin N. Hainline, Jakob M. Helton, Brittany E. Miles, Jarron Leisenring, Mark S. Marley, Sagnick Mukherjee, Nicholas F. Wogan, Andrew J. Bunker, Benjamin D. Johnson, Roberto Maiolino, Marcia Rieke, Pierluigi Rinaldi, Brant Robertson, Fengwu Sun, Sandro Tacchella, Christina C. Williams, Christopher N. A. Willmer   +16 more
doaj   +1 more source

brown dwarfs

As the author of "Brown Dwarfs: The Boundary Between Planets and Stars," I present this meticulously researched and authoritative 17-page document, a significant contribution to the field of astronomy. This work offers a comprehensive analysis of brown dwarfs, celestial objects with masses ranging from 13 to 80 times that of Jupiter and surface ...
Moradi.MRM, Moradi.MRM
openaire   +1 more source

Proso Millet (Panicum miliaceum): Nutritional Composition, Functional Attributes, and Health Implications

Future Postharvest and Food, EarlyView.
A nutrient‐dense grain, proso millet is well‐known for its high protein content and vital amino acids. It is high in fiber, vitamins, and minerals and has many health advantages, including promoting heart health, enhancing digestion, and helping with weight management.
Sangeeta Yadav, Pratiksha Singh, Mazia Ahmed, Pinki Saini   +3 more
wiley   +1 more source

Monuments to Injustice and the Ethics of Dark Tourism: A Research Note

Journal of Applied Philosophy, EarlyView.
ABSTRACT This research note aims to motivate philosophical examination of the ethical tensions surrounding ‘dark tourism’ and monuments to injustice. While such monuments function to acknowledge past wrongs, educate the public, and serve reparative functions, their presentation as tourist destinations can undermine these purposes.
Kok‐Chor Tan
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., Jones H.R.A., Warren S.J., Marley M.S., Saumon D., Burningham B., Leggett S.K., Smart R.L.   +7 more
doaj   +1 more source