Results 101 to 110 of about 71,825 (285)

Diversity of Cold Worlds: Predicted Near-to-mid-infrared Spectral Signatures of a Cold Brown Dwarf with Potential Auroral Heating

The Astrophysical Journal
Recent James Webb Space Telescope NIRSpec observations have revealed strong methane emission at 3.326 μ m in the ≈482 K brown dwarf CWISEP J193518.59−154620.3 (W1935).
Genaro Suárez, Jacqueline K. Faherty, Ben Burningham, Caroline V. Morley, Johanna M. Vos, Brianna Lacy, Melanie J. Rowland, Adam C. Schneider, Sherelyn Alejandro Merchan, Daniella C. Bardalez Gagliuffi, Thomas P. Bickle, Eileen C. Gonzales, Rocio Kiman, Austin Rothermich, Niall Whiteford   +14 more
doaj   +1 more source

Clouds and chemistry across the brown dwarf T-Y sequence: Insights from JWST atmospheric retrievals

Astronomy & Astrophysics
The James Webb Space Telescope offers exceptional spectral resolution and wavelength coverage, which are essential for studying the coldest brown dwarfs, particularly Y dwarfs.
Lueber A., Kitzmann D., Heng K.
doaj   +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

Toward Robust Atmospheric Retrieval on Cloudy L Dwarfs: the Impact of Thermal and Abundance Profile Assumptions

The Astrophysical Journal, 2023
Constraining L dwarf properties from their spectra is challenging. Near-infrared (NIR) spectra probe a limited range of pressures, while many species condense within their photospheres. Condensation creates two complexities: gas-phase species “rain out” (
Melanie J. Rowland, Caroline V. Morley, Michael R. Line   +2 more
doaj   +1 more source

NEAR-INFRARED PHOTOMETRY OF Y DWARFS: LOW AMMONIA ABUNDANCE AND THE ONSET OF WATER CLOUDS [PDF]

The Astrophysical Journal, 2015
We present new near-infrared photometry for seven late-type T dwarfs and nine Y-type dwarfs, and lower limit magnitudes for a tenth Y dwarf, obtained at Gemini Observatory. We also present a reanalysis of H-band imaging data from the Keck Observatory Archive, for an eleventh Y dwarf.
Saumon, D., Marley, M., Morley, Caroline, Leggett, S., Morley, Caroline, Marley, M., Morley, Caroline, Leggett, S.   +7 more
openaire   +2 more sources

Alzheimer's Disease Risk Factor APOE4 Exerts Dimorphic Effects on Female Bone

Advanced Science, EarlyView.
In aging bone, osteocytes accumulate neurodegenerative risk factor Apolipoprotein E (APOE). A humanized version of the Alzheimer's disease risk allele APOE4 altered the mouse bone transcriptome and proteome, with effects in female bone surpassing the brain, including bone fragility due to suppressed osteocytic maintenance of bone quality, identifying ...
Charles A. Schurman, Gurcharan Kaur, Serra Kaya, Joanna Bons, Carlos Galicia Aguirre, Qi Liu, Christina D. King, Kenneth A. Wilson, Harrison L. Baker, Mikayla Hady, Nadja Maldonado Luna, Gregor Bieri, Saul A. Villeda, Lisa M. Ellerby, Birgit Schilling, Tamara Alliston   +15 more
wiley   +1 more source

A Volume-limited Sample of Ultracool Dwarfs. II. The Substellar Age and Mass Functions in the Solar Neighborhood

The Astrophysical Journal
We present the most precise constraints to date for the mass and age distributions of single ultracool dwarfs in the solar neighborhood, based on an updated volume-limited sample of 504 L, T, and Y dwarfs within 25 pc.
William M. J. Best, Aniket Sanghi, Michael C. Liu, Eugene A. Magnier, Trent J. Dupuy   +4 more
doaj   +1 more source

Caby Photometry of the Hyades: Comparisons to the Field Stars

, 2002
Intermediate-band photometry of the Hyades cluster on the Caby system is presented for dwarf stars ranging from spectral type A through late K. A mean hk, b-y relation is constructed using only single stars without anomalous atmospheres and compared to ...
Alexander J. B., Barbara J. Anthony-Twarog, Bruce A. Twarog, Deming D., Edvardsson B., Favata F., Gronbech B., Judy Yu, Nissen P. E., Olsen E. H., Olsen E. H., Olsen E. H., Perryman M. A. C., Reglero V., Rocha-Pinto H. J., Schuster W. J., Schuster W. J., Van Bueren H. G.   +17 more
core   +1 more source

Introgressed Variation in TaMYB7‐A1 Drives Graded Dormancy and Climate‐Adaptive Pre‐Harvest Sprouting Resistance in Wheat

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, Dongzhi Wang, Yafei Guo, Qi Zheng, Min Zhang, James Simmonds, Jian Hou, Xuemei Liu, Xuelei Lin, Xiaomin Bie, Xiansheng Zhang, Xiaohui Li, Yuan Chen, Xueyong Zhang, Cristobal Uauy, Fei Lu, Chengcai Chu, Zhixi Tian, Jun Xiao   +18 more
wiley   +1 more source

The Brown-dwarf Atmosphere Monitoring (BAM) Project II: Multi-epoch monitoring of extremely cool brown dwarfs

, 2015
With the discovery of Y dwarfs by the WISE mission, the population of field brown dwarfs now extends to objects with temperatures comparable to those of Solar System planets.
Bulger, J., De Rosa, R. J., Morley, C., Patience, J., Pont, F., Rajan, A., Ward-Duong, K., Wilson, P. A., Windhorst, R.   +8 more
core   +2 more sources