Results 91 to 100 of about 3,488 (245)

Atmospheric Abundances and Bulk Properties of the Binary Brown Dwarf Gliese 229Bab from JWST/MIRI Spectroscopy

The Astrophysical Journal Letters
We present JWST/Mid Infrared Instrument (MIRI) low-resolution spectroscopy (4.75–14 μ m) of the first known substellar companion, Gliese 229Bab, which was recently resolved into a tight binary brown dwarf.
Jerry W. Xuan, Marshall D. Perrin, Dimitri Mawet, Heather A. Knutson, Sagnick Mukherjee, Yapeng Zhang, Kielan K. W. Hoch, Jason J. Wang, Julie Inglis, Nicole L. Wallack, Jean-Baptiste Ruffio   +10 more
doaj   +1 more source

ASpitzerInfrared Spectrograph Spectral Sequence of M, L, and T Dwarfs [PDF]

, 2006
Michael C. Cushing, Thomas L. Roellig, Mark S. Marley, D. Saumon, S. K. Leggett, J. Davy Kirkpatrick, John C. Wilson, G. C. Sloan, Amy Mainzer, J. E. Van Cleve, J. R. Houck   +10 more
openalex   +1 more source

Phosphate Removal by ZIF‐8 and Magnetic Fe3O4/ZIF‐8: A Comparative Study of Capacity, Kinetics, and Regeneration

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study presents a comparative evaluation of phosphate adsorption on pristine ZIF‐8 and Fe3O4‐doped ZIF‐8 (Fe3O4/ZIF‐8), a hybrid adsorbent combining high surface area with magnetic separability. Structural integrity and composition were confirmed using SEM, XRD, FTIR, and XPS.
Edward Hartman Ernest, Maria Stefani, Immanuel Joseph Ondang, Artik Elisa Angkawijaya, Shella Permatasari Santoso, Hsien‐Yi Hsu, Felycia Edi Soetaredjo, Kuan‐Chen Cheng, Shin‐Ping Lin, Chang‐Wei Hsieh, Suryadi Ismadji   +10 more
wiley   +1 more source

SDSS J100711.74+193056.2: A Candidate Common Motion Substellar Companion to the Nearest B-type Star Regulus

The Astronomical Journal
The L9 dwarf SDSS J100711.74+193056.2 is situated 7 $\mathop{.}\limits^{^\circ }$ 5 north of the nearest B-type star Regulus ( d  = 24.3 ± 0.2 pc), part of a stellar quadruplet.
Eric E. Mamajek, Adam J. Burgasser
doaj   +1 more source

Arrhenius Activation Energy on Viscous and Radiative Heating of Hybridized Chemical Reactive Magnetized‐Casson Nanofluid Flow in Saturated Porous Media With Varied Heat Source/Sink

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study analyzes the influence of Arrhenius activation energy on the chemically reactive, magnetohydrodynamic Casson hybrid nanofluid flow past an exponentially stretching surface embedded in a Darcy–Forchheimer porous medium with a non‐uniform heat source/sink.
Md. Sailanebaba, MD. Shamshuddin, S. O. Salawu   +2 more
wiley   +1 more source

Detection of Methane in the Closest Extreme Metal-poor T Dwarf WISEA J181006.18−101000.5

The Astrophysical Journal Letters
WISEA J181006.18−101000.5 (WISE1810) is the nearest metal-poor ultracool dwarf to the Sun. It has a low effective temperature and has been classified as an extreme early-T subdwarf.
Jerry J.-Y. Zhang, Nicolas Lodieu, Eduardo L. Martín, Pascal Tremblin, María Rosa Zapatero Osorio, Víctor J. S. Béjar, Nikola Vitas, Bartosz Gauza, Yakiv V. Pavlenko, Rafael Rebolo   +9 more
doaj   +1 more source

Bioconvection Darcy–Forchheimer Flow of Ree‐Eyring Nanofluid Over a Riga Plate With Arrhenius Activation Energy and Viscous Dissipation

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This work examines the intricate interactions of heat radiation, viscous dissipation, the Cattaneo–Christov thermal model, gyrotactic microorganisms, Arrhenius activation energy, and Darcy–Forchheimer flow affecting Ree‐Eyring nanofluid behavior across a Riga plate.
M. Vinodkumar Reddy, V. Sivaramakrishna, Jintu Mani Nath, V. V. L. Deepthi, Bamdeb Dey   +4 more
wiley   +1 more source

Enabling the study of gene function in gymnosperms: Virus‐induced gene silencing in Ephedra tweedieana

Applications in Plant Sciences, EarlyView.
Abstract Premise As the sister clade to angiosperms, extant gymnosperms are crucial for reconstructing ancestral gene regulatory networks in seed plants. This highlights the need for model systems representing each of their distinct lineages. However, tools to quickly and effectively investigate gene function in gymnosperms are still limited due to the
Anthony G. K. Garcia, Jo Trang Bùi, Todd P. Michael, Stefanie M. Ickert‐Bond, Verónica S. Di Stilio   +4 more
wiley   +1 more source

Euclid Quick Data Release (Q1)—Spectroscopic Search, Classification, and Analysis of Ultracool Dwarfs in the Deep Fields

The Astrophysical Journal
The Near-Infrared Spectrometer and Photometer on board the Euclid space mission has obtained near-infrared (NIR) slitless spectra of millions of objects, including hundreds of ultracool dwarfs (UCDs).
C. Dominguez-Tagle, M. Žerjal, N. Sedighi, P. Mas-Buitrago, E. L. Martin, J.-Y. Zhang, N. Vitas, V. J. S. Béjar, S. Tsilia, S. Muñoz Torres, N. Lodieu, D. Barrado, E. Solano, P. Cruz, R. Tata, N. Phan-Bao, A. Burgasser   +16 more
doaj   +1 more source

First T dwarfs in the VISTA Hemisphere Survey [PDF]

, 2012
N. Lodieu, Ben Burningham, A. C. Day-Jones, R.‐D. Scholz, Federico Marocco, S. E. Koposov, D. Barrado, P. W. Lucas, P. Cruz, J. Lillo-Box, H. R. A. Jones, A. Pérez‐Garrido, M. T. Ruíz, D. J. Pinfield, R. Rébolo, V. J. S. Béjar, S. Boudreault, J. P. Emerson, M. Banerji, E. González-Solares, S. T. Hodgkin, R. G. McMahon, J. Canty, C. Contreras   +23 more
openalex   +1 more source