Results 81 to 90 of about 1,220,192 (373)

The search for planetary mass companions to field brown dwarfs with HST/NICMOS

, 2010
We present the results of a high-resolution spectral differential imaging survey of 12 nearby, relatively young field L dwarfs ( 0.8 confirm the preference for equal mass systems similar to a large number of other surveys. Furthermore, we found tentative
Bouy, H., Brandner, W., Henning, Th., Joergens, V., Kasper, M., Köhler, R., Stumpf, M. B.   +6 more
core   +1 more source

CARMA interferometric observations of 2MASS J044427+2512: the first spatially resolved observations of thermal emission of a brown dwarf disk [PDF]

, 2013
We present CARMA 1.3 mm continuum data of the disk surrounding the young brown dwarf 2MASS J044427+2512 in the Taurus molecular cloud. The high angular resolution of the CARMA observations (0.16 arcsec) allows us to spatially resolve for the first time ...
Carpenter, J. M., Isella, A., Ricci, L., Testi, L.   +3 more
core   +2 more sources

First Detection of a Strong Magnetic Field on a Bursty Brown Dwarf: Puzzle Solved [PDF]

, 2017
We report the first direct detection of a strong, 5 kG magnetic field on the surface of an active brown dwarf. LSR J1835+3259 is an M8.5 dwarf exhibiting transient radio and optical emission bursts modulated by fast rotation. We have detected the surface
S. Berdyugina, S. Berdyugina, David M. Harrington, David M. Harrington, O. Kuzmychov, J. Kuhn, G. Hallinan, A. Kowalski, S. Hawley   +8 more
semanticscholar   +1 more source

Antagonistic Ghd7‐OsNAC42 Complexes Modulate Carbon and Nitrogen Metabolism to Achieves Superior Quality and High Yield in Rice

Advanced Science, EarlyView.
The complex centered on Ghd7 binds to numerous carbon and nitrogen metabolism genes on the genome through the corresponding motifs and transactivates the transcriptional expression of these carbon and nitrogen metabolism genes. With the assistance of OsNAC42 and other unknown Ghd7‐interacting proteins, this complex can regulate different metabolic ...
Guangming Lou, Pingli Chen, Pingbo Li, Haozhou Gao, Jiawang Xiong, Shanshan Wan, Yuanyuan Zheng, Yufu Wang, Mufid Alam, Yingnanjun Chen, Lei Wang, Jingjing Bai, Xuan Tan, Wenting Rao, Bian Wu, Hao Zhou, Yanhua Li, Guanjun Gao, Qinglu Zhang, Jinghua Xiao, Xianghua Li, Xuelei lai, Qifa Zhang, Yuqing He   +23 more
wiley   +1 more source

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

OGLE-2016-BLG-0693LB: Probing the Brown Dwarf Desert with Microlensing

, 2017
We present an analysis of microlensing event OGLE-2016-BLG-0693, based on the survey-only microlensing observations by the OGLE and KMTNet groups. In order to analyze the light curve, we consider the effects of parallax, orbital motion, and baseline ...
Albrow, M. D., Cha, S. -M., Chung, S. -J., Gould, A., Han, C., Hwang, K. -H., Jung, Y. K., Kim, D. -J., Kim, H. -W., Kim, S. -L., Kozlowski, S., Lee, C. -U., Lee, Y., Mroz, P., Park, B. -G., Pawlak, M., Pietrukowicz, P., Pogge, R. W., Poleski, R., Ryu, Y. -H., Shin, I. -G., Skowron, J., Soszynski, I., Szymanski, M. K., Udalski, A., Ulaczyk, K., Yee, J. C., Zhu, W.   +27 more
core   +1 more source

CLOUD ATLAS: DISCOVERY OF PATCHY CLOUDS AND HIGH-AMPLITUDE ROTATIONAL MODULATIONS IN A YOUNG, EXTREMELY RED L-TYPE BROWN DWARF [PDF]

, 2016
Condensate clouds fundamentally impact the atmospheric structure and spectra of exoplanets and brown dwarfs, but the connections between surface gravity, cloud structure, dust in the upper atmosphere, and the red colors of some brown dwarfs remain poorly
Ben W. P. Lew, D. Apai, Yifan Zhou, G. Schneider, A. Burgasser, T. Karalidi, Hao Yang, M. Marley, N. Cowan, L. Bedin, S. Metchev, Jacqueline Radigan, P. Lowrance   +12 more
semanticscholar   +1 more source

Astrometry and Photometry for Cool Dwarfs and Brown Dwarfs [PDF]

The Astronomical Journal, 2002
48 pages, including 7 figures and 6 tables.
Richard L. Walker, Frederick J. Vrba, John E. Gizis, John E. Gizis, Arne Henden, James Liebert, Stephen E. Levine, I. Neill Reid, Alice K. B. Monet, Conard C. Dahn, Ronald C. Stone, Christian B. Luginbuhl, Jeffrey R. Pier, J. Davy Kirkpatrick, Harry H. Guetter, Hugh C. Harris, David G. Monet, B. Canzian, Adam J. Burgasser   +18 more
openaire   +3 more sources

A kinematically Bifurcated Metamaterial for Integrated Logic Operation and Computing

Advanced Science, EarlyView.
A family of 2n‐side kinematic polygonal modules with n decoupled inputs and 2n extreme configurations via kinematic bifurcation is proposed. It allows integrating seven basic logic gates on a quadrilateral module. Moreover, a minimized Parallel Computing Sum of Products function is developed, enabling all 2‐bit arithmetic (including division ...
Kaili Xi, Jingsong Wei, Xiao Zhang, Jiayao Ma, Zhong You, Changqing Chen, Yan Chen   +6 more
wiley   +1 more source

Long-term 4.6 μm Variability in Brown Dwarfs and a New Technique for Identifying Brown Dwarf Binary Candidates

The Astronomical Journal, 2023
Using a sample of 361 nearby brown dwarfs, we have searched for 4.6 μ m variability, indicative of large-scale rotational modulations or large-scale, long-term changes on timescales of over 10 yr.
Hunter Brooks, J. Davy Kirkpatrick, Aaron M. Meisner, Christopher R. Gelino, Daniella C. Bardalez Gagliuffi, Federico Marocco, Adam C. Schneider, Jacqueline K. Faherty, S. L. Casewell, Yadukrishna Raghu, Marc J. Kuchner, The Backyard Worlds: Planet 9 Collaboration   +11 more
doaj   +1 more source