Results 121 to 130 of about 15,774,260 (349)

Observation and modelling of dusty, low gravity L, and M dwarfs [PDF]

, 2009
Observational facilities allow now the detection of optical and IR spectra of young M‐ and L‐dwarfs. This enables empirical comparisons with old M‐ and L‐ dwarfs, and detailed studies in comparison with synthetic spectra.
Heiter, Ulrike, Seifahrt, Andreas, Adam J. Burgasser, Michael C. Cushing, Looper, Dagny L., Witte, Soeren, Ulrike Heiter, Cushing, Michael C., Katelyn N. Allers, Burgasser, Adam J., Sören Witte, Cushing, M. C., Andreas Seifahrt, Burgasser, A. J., Helling, Christiane, Witte, Sören, Heiter, Ulrike,, Cruz, Kelle L., Witte, S., Seifahrt, A., Helling, C., Christiane Helling, Allers, K. N., Kelle L. Cruz, Looper, D. L., Eric Stempels, Dagny L. Looper, Allers, Katelyn N., Cruz, K. L.   +28 more
core   +1 more source

News of Effective Temperatures of L Dwarfs [PDF]

Symposium - International Astronomical Union, 2003
In this work we report recent spectral analyses of L dwarfs and our success in measuring Teff and log(g). Using dust filled atmospheres for early L dwarfs and rained out atmospheres for late L dwarfs we could derive Teff of 1400 to 2000 K for L8 to M9.5 dwarfs respectively.
Andreas Schweitzer, John E. Gizis, France Allard, Peter H. Hauschildt   +3 more
openaire   +1 more source

A TARGETED SEARCH FOR PECULIARLY RED L AND T DWARFS IN SDSS, 2MASS, AND WISE: DISCOVERY OF A POSSIBLE L7 MEMBER OF THE TW HYDRAE ASSOCIATION [PDF]

, 2015
We present the first results from a targeted search for brown dwarfs with unusual red colors indicative of peculiar atmospheric characteristics. These include objects with low surface gravities or with unusual dust content or cloud properties.
K. Kellogg, K. Kellogg, S. Metchev, S. Metchev, K. Geissler, S. Hicks, J. Kirkpatrick, R. Kurtev, R. Kurtev   +8 more
semanticscholar   +1 more source

NLSS3 Impairs SHM1 Autophagic Degradation to Regulate Leaf Morphology and Salt Tolerance in Rice

Advanced Science, EarlyView.
In rice, NLSS3 binds and shields SHM1 from autophagic degradation to maintain serine homeostasis. The A132P mutation in nlss3 disrupts this, triggering SHM1 loss, metabolic dysfunction, K+ imbalance, and impaired ROS scavenging, which collectively drive narrow leaves and salt sensitivity.
Xiong Liu, Yulu Yang, Zhiqi Hao, Jing Xu, Huibo Zhao, Qiang Zhang, Deyong Ren, Xia Li, Guojun Dong, Lan Shen, Li Zhu, Jiang Hu, Zhenyu Gao, Qing Li, Qian Qian, Guangheng Zhang   +15 more
wiley   +1 more source

Comparing Grid Model Fitting Methodologies for Low-temperature Atmospheres: Markov Chain Monte Carlo versus Random Forest Retrieval

The Astrophysical Journal
The atmospheres of low-temperature stars, brown dwarfs, and exoplanets are challenging to model due to strong molecular features and complex gas and condensate chemistry.
Anna Lueber, Adam J. Burgasser
doaj   +1 more source

The L to T Dwarf Transition

, 2004
4 pages, 6 figures, proceedings from the 13th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, Hamburg, Germany, July 2004, ESA-SP, in ...
Marley, M. S., Cushing, M. C., Saumon, D.   +2 more
openaire   +2 more sources

Finding ultracool brown dwarfs with MegaCam on CFHT: method and first results [PDF]

, 2008
Aims. We present the first results of a wide field survey for cool brown dwarfs with the MegaCam camera on the CFHT telescope, the Canada-France Brown Dwarf Survey, hereafter CFBDS.
P. Delorme, C. Willott, T. Forveille, X. Delfosse, C. Reyl'e, E. Bertin, L. Albert, É. Artigau, A. Robin, F. Allard, R. Doyon, G. Hill   +11 more
semanticscholar   +1 more source

Flexoelectricity in Photoconversion: Fundamentals, Materials, and Outlooks

Advanced Science, EarlyView.
Mechanical bending of a flexible cantilever induces a strain gradient in the photoactive material. The resulting flexoelectric field couples with photovoltaic and photoconductive effects, modulating charge generation, separation, and collection. A comparative analysis of oxide perovskites, halide perovskites, and two‐dimensional materials is presented,
Xiang Huang, Feng Li, Rongkun Zheng
wiley   +1 more source

Discovery of the Remarkably Red L/T Transition Object VHS J183135.58-551355.9

The Astronomical Journal
We present the discovery of VHS J183135.58−551355.9 (hereafter VHS J1831−5513), an L/T transition dwarf identified as a result of its unusually red near-infrared colors ( J − K _S = 3.633 ± 0.277 mag; J − W 2 = 6.249 ± 0.245 mag) from the VISTA ...
Thomas P. Bickle, Adam C. Schneider, Jonathan Gagné, Jacqueline K. Faherty, Austin Rothermich, Johanna M. Vos, Genaro Suárez, J. Davy Kirkpatrick, Aaron M. Meisner, Marc J. Kuchner, Adam J. Burgasser, Federico Marocco, Sarah L. Casewell, Dan Caselden, Daniella C. Bardalez Gagliuffi, The Backyard Worlds: Planet 9 Collaboration   +15 more
doaj   +1 more source

The GALAH Survey : Lithium-strong KM dwarfs

, 2019
Identifying and characterizing young stars in the Solar neighbourhood is essential to find and describe planets in the early stages of their evolution. This work seeks to identify nearby young stars showing a lithium 6708 Å absorption line in the GALAH ...
Martell, S.,, Traven, G., Zwitter, T., Casagrande, L., De Silva, G., Horner, J., De Silva, G.,, Martell, S., Nordlander, T., Buder, S.,, Zerjal, M., GALAH Collaboration, Nordlander, T.,, Buder, S., Casagrande, L.,, Lin, J., Čotar, K., Åotar, K.,, Zwitter, T.,, Ireland, M. J.,, Collaboration, G., Åotar, K., Ireland, M., Ireland, M. J., Zerjal, M.,, Horner, J.,, Lin, J.,   +26 more
core   +1 more source