Results 191 to 200 of about 12,083,844 (366)

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

Analysis of the fractional relativistic polytropic gas sphere. [PDF]

Sci Rep, 2023
Aboueisha MS, Nouh MI, Abdel-Salam EA, Kamel TM, Beheary MM, Gadallah KAK.   +5 more
europepmc   +1 more source

TelescopeML. II. Convolutional Neural Networks for Predicting Brown Dwarf Atmospheric Parameters

The Astrophysical Journal
Accurately and swiftly predicting the parameters of brown dwarf atmospheres from observational spectra is crucial for understanding their atmospheric composition and guiding future follow-up observations.
Ehsan (Sam) Gharib-Nezhad, Hamed Valizadegan, Natasha E. Batalha, Miguel J. S. Martinho, Ben W.P. Lew   +4 more
doaj   +1 more source

Low Molecular Weight Multistate Photoswitches Based on Simple Norbornadiene‐Triazine Scaffolds

Angewandte Chemie International Edition, EarlyView.
Our new polyswitchable norbornadiene‐triazine hybrids are promising candidates for molecular based data storage. These small, low‐molecular‐weight molecules can be both symmetric or contain different NBD chromophors and exhibit an unprecedently high variety of distinct switching states.
Daniel Krappmann, Adrian J. Müller, Erik J. Schulze, Harald Maid, Andreas Dreuw, Andreas Hirsch   +5 more
wiley   +1 more source

A Demonstration on Dwarfs: True Dwarfs and Dwarfs from Rickets [PDF]

BMJ, 1891
openaire   +3 more sources

Compatibility Between HPEG Type PCEs With Various Anionic Charge Densities and Portland Cements With Different C3A Contents

Journal of Applied Polymer Science, EarlyView.
Evaluation of the compatibility between PCEs possessing varying anionic charge densities and Portland cements with different C3A contents. ABSTRACT This study focused on the compatibility of phosphate and sulfonate‐substituted polycarboxylate ether‐based water‐reducing admixtures (PCE) exhibiting different anionic charge densities with Portland cements
Kemal Karakuzu, Veysel Kobya, Ali Mardani, Burak Felekoğlu, Kambiz Ramyar   +4 more
wiley   +1 more source

Redshifting the Study of Cold Brown Dwarfs and Exoplanets: The Mid-infrared Wavelength Region as an Indicator of Surface Gravity and Mass

The Astrophysical Journal
JWST is opening many avenues for exploration. For cold brown dwarfs and exoplanets, JWST has opened the door to the mid-infrared wavelength region, where such objects emit significant energy.
S. K. Leggett, Pascal Tremblin
doaj   +1 more source

Histochemical indications for a chemically complex signal produced by the cervical gill slit gland of the pygmy sperm whale (Kogia breviceps)

The Anatomical Record, EarlyView.
Abstract The pygmy sperm whale (Kogia breviceps) possesses an exocrine gland associated with its false gill slit pigmentation pattern. The cervical gill slit gland is a compound tubuloalveolar gland that produces a holocrine secretion and displays maturational changes in size and secretory histology. While the morphology of the cervical gill slit gland
Tiffany F. Keenan, William A. McLellan, Sentiel A. Rommel, Alexander M. Costidis, Craig A. Harms, J. G. M. Thewissen, Susan J. Rehorek, David S. Rotstein, Mark D. Gay, Alison R. Taylor, Heather N. Koopman, Ying Wang, Stephanie Kamel, D. Ann Pabst   +13 more
wiley   +1 more source

Discovery of sexual dimorphism of the laryngeal sac in the common minke whale Balaenoptera acutorostrata

The Anatomical Record, EarlyView.
Abstract Mysticetes, or baleen whales, have an air sac on the ventral surface of the larynx known as the “laryngeal sac.” The primary hypothesis regarding this structure's function is that it is involved in sound production. However, several other functions have been proposed, including air recycling, air storage, and even buoyancy control.
Gen Nakamura, Hiroko Yamada, Ayumi Hirose, Hikari Maeda, Joy S. Reidenberg, Hidehiro Kato, Shinho Park, Yoshihiro Fujise   +7 more
wiley   +1 more source

An Informed and Systematic Method to Identify Variable Mid-L Dwarfs

The Astrophysical Journal
Most brown dwarfs show some level of photometric or spectral variability. However, finding the most variable dwarfs more suited for a thorough variability monitoring campaign remained a challenge until a few years ago with the design of spectral indices ...
Natalia Oliveros-Gomez, Elena Manjavacas, Daniella C. Bardalez Gagliuffi, Theodora Karalidi, Johanna M. Vos, Jacqueline K. Faherty   +5 more
doaj   +1 more source