Results 111 to 120 of about 71,830 (288)

Three Brown Dwarfs Masquerading as High-redshift Galaxies in JWST Observations

The Astrophysical Journal
We 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, Shu Wang, Xiaodian Chen, Jifeng Liu   +3 more
doaj   +1 more source

A Physically-Motivated Photometric Calibration of M Dwarf Metallicity

, 2010
The location of M dwarfs in the V-K_s--M_Ks color-magnitude diagram (CMD) has been shown to correlate with metallicity. We demonstrate that previous empirical photometric calibrations of M dwarf metallicity exploiting this correlation systematically ...
Apps, Bailey, Baraffe, Bonfils, Bonfils, Bonfils, Bouchy, Butler, Carpenter, Charbonneau, Egret, Fischer, Forveille, G. Laughlin, Gustafsson, Hartmann, Hawley, Hayashi, Hocking, Holmberg, Holmberg, Ida, Johnson, Johnson, Johnson, K. C. Schlaufman, Laughlin, Lissauer, Maness, Marcy, Mermilliod, Nordström, Nutzman, Perryman, Santos, Skrutskie, Sousa, Udry, Valenti, van Leeuwen   +39 more
core   +1 more source

A Novel 10‐Protein Score for Liver Fat Content Predicts Cardiovascular‐Kidney‐Metabolic Disease Risk

Advanced Science, EarlyView.
A novel 10‐protein plasma score precisely quantifies liver fat, outperforming the fatty liver index. It robustly predicts the risk of numerous cardiovascular‐kidney‐metabolic diseases and integrates with genetic data for precision prevention, offering a practical alternative to magnetic resonance imaging (MRI). Abstract Liver fat content (LFC) is a key
Xiaoqin Gan, Yuanxiu Wei, Yiting Wu, Xinyue Su, Gangling Wang, Sisi Yang, Ziliang Ye, Yanjun Zhang, Hao Xiang, Yu Huang, Yiwei Zhang, Yuanyuan Zhang, Xianhui Qin   +12 more
wiley   +1 more source

Tracers of chromospheric structure. I. CaII H$\&$K emission distribution of 13000 F, G and K stars in SDSS DR7 spectroscopic sample [PDF]

, 2013
We present chromospheric activity index $S\rm_{HK}$ measurements for over 13,000 F, G and K disk stars with high signal-to-noise ratio ($>$ 60) spectra in the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) spectroscopic sample.
Lu, Q. H., Luo, A. L., Oswalt, T. D., Zhang, L. Y., Zhao, G., Zhao, J. K.   +5 more
core   +5 more sources

Alkylthienyl Side Groups in Conjugated Polymers Enable Localization of π Electron Density and Facilitate Efficient Hole Transfer

Advanced Science, EarlyView.
Resonance Raman spectroscopy is used in combination with other spectroscopic and morphology characterization techniques to unveil the mechanistic origin of the shift in synthetic strategy to alkylthienyl peripheral groups for high‐performing organic photovoltaics.
Hristo Ivov Gonev, Daniel G. Congrave, Junjun Guo, Jose Marin‐Beloqui, Max Allen, David Bacon, Ankita Kumari, Mohammad Saeed Shadabroo, He Zhu, Dibyajyoti Ghosh, Rachel C. Kilbride, Safa Shoaee, Hugo Bronstein, Tracey M. Clarke   +13 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

A physically motivated and empirically calibrated method to measure effective temperature, metallicity, and Ti abundance of M dwarfs [PDF]

, 2017
The ability to perform detailed chemical analysis of Sun-like F-, G-, and K-type stars is a powerful tool with many applications including studying the chemical evolution of the Galaxy and constraining planet formation theories.
Allard, France, Brewer, John M., Homeier, Derek, Mann, Andrew W., Muirhead, Philip S., Veyette, Mark J.   +5 more
core   +5 more sources

TOGR3, a Proteasome β4 Subunit, Orchestrates Sugar Homeostasis to Trade Off Growth and Thermotolerance in Rice

Advanced Science, EarlyView.
This study identifies a novel thermoregulatory mechanism in rice: TOGR3 partners with 26S proteasome subunits, including TT1, to drive thermoresponsive ubiquitin–proteasome activity, maintaining sugar homeostasis in stomatal regulation to balance growth and stress resistance.
Biyao Zhang, Xiaoyan Wu, Ting Xu, Feifei Guo, Xiaolu Shen, Cuiping Meng, Yanan Wang, Xue Han, Hong Zhao, Yongbiao Xue   +9 more
wiley   +1 more source

Brown Dwarf Candidates in the JADES and CEERS Extragalactic Surveys

The Astrophysical Journal
By combining the James Webb Space Telescope (JWST)/NIRCam JADES and CEERS extragalactic data sets, we have uncovered a sample of 21 T and Y brown dwarf candidates at best-fit distances between 0.1 and 4.2 kpc. These sources were selected by targeting the
Kevin N. Hainline, Jakob M. Helton, Benjamin D. Johnson, Fengwu Sun, Michael W. Topping, Jarron M. Leisenring, William M. Baker, Daniel J. Eisenstein, Ryan Hausen, Raphael E. Hviding, Jianwei Lyu, Brant Robertson, Sandro Tacchella, Christina C. Williams, Christopher N. A. Willmer, Thomas L. Roellig   +15 more
doaj   +1 more source

¿Los cipreses creen en Dios? Acerca de Garbancito de la Mancha (Arturo Moreno, 1945)

Con A de Animación, 2012
<p>Se describen las excepcionales circunstancias que rodearon la producción de <em>Garbancito de La Mancha </em>(1941), primer largometraje de animación en color europeo, y analiza tanto la contaminación en el film de las ideologías ...
Alejandro Montiel
doaj   +1 more source