Results 21 to 30 of about 1,427 (189)

Optical and Radio Surface Photometry of NGC 891 [PDF]

Symposium - International Astronomical Union, 1990
A general correlation between the radio and optical continuum surface brightness has been found in the edge-on galaxy NGC 891. This suggests that the relativistic electrons are produced/accelerated in the vicinity of evolved stars or stellar remnants which have a spatial distribution similar to old disk stars.
ALLEN, RJ, SUKUMAR, S, HU, FX, VANDERKRUIT, PC   +3 more
openaire   +2 more sources

Optical Photometry of Black-Hole Candidates [PDF]

Symposium - International Astronomical Union, 1996
The orbital light curves of SXTs are discussed. In principle, the orbital inclination can be determined from the ellipsoidal variations, allowing a complete solution for the component masses. Complications in this analysis are described, and the evidence for superhumps in the light curves is reviewed.
openaire   +1 more source

LBT Italia: Current Achievements and Future Directions

Instruments
The Large Binocular Telescope (LBT) is a world-leading astronomical observatory, where the Italian partnership has played an important role in increasing the telescope’s productivity, both through an optimized observing strategy and through peer-reviewed
Silvia Tosi, Ester Marini, Felice Cusano, Andrea Rossi, Roberto Speziali, Roberta Carini   +5 more
doaj   +1 more source

Evaluation of Uniformity and Glare Improvement with Low Energy Efficiency Losses in Street Lighting LED Luminaires Using Laser-Sintered Polyamide-Based Diffuse Covers

Energies, 2018
Energy saving in street lighting is garnering more interest and has become a priority in municipal management. Therefore, LED luminaires are gradually becoming prevalent in our cities.
Alfonso Gago-Calderón, Manuel Jesús Hermoso-Orzáez, Jose Ramon De Andres-Diaz, Guillermo Redrado-Salvatierra   +3 more
doaj   +1 more source

Array Polarimetry and Optical-Differencing Photometry [PDF]

Symposium - International Astronomical Union, 1995
Array detectors have improved the efficiency of optical polarimetry sufficiently for this technique to become part of the standard arsenal of observational facilities. However, we could gain even more: spatially-differentiating photometry can be implemented as an option of array Polarimeters and low-noise, high-frame-rate array detectors will allow ...
openaire   +1 more source

MODERNIZATION OF AZT-22 TELESCOPE OF MAIDANAK HIGH-ALTITUDE OBSERVATORY: TESTING RESULTS

Radio Physics and Radio Astronomy, 2014
The AZT-22 telescope, equipped with the ML09000-65 CCD camera, has shown to be capable of obtaining high-quality images of astronomical objects and thus solving a wide range of observational tasks.
A. V. Sergeev, O. A. Burkhonov, V. N. Dudinov, A. P. Zheleznyak, Y. N. Krugly, I. E. Molotov, V. M. Shulga, S. A. Ehgamberdiev, V. V. Konichek, A. E. Kochetov   +9 more
doaj   +1 more source

Delta Opioid Receptors within the Cortico‐Thalamic Circuitry Underlie Hyperactivity Induced by High‐Dose Morphine

Advanced Science, EarlyView.
Morphine activates the excitatory cingulate cortex–intermediate rostrocaudal division of zona incerta (Cg‐ZIm) pathway to drive hyperlocomotion in mice. Inhibiting the Cg‐ZIm pathway attenuates both acute and chronic morphine‐induced hyperlocomotion, while its activation mimics morphine's motor effects.
Chun‐Yue Li, Huiqian Huang, Xiao‐Fan Shen, Ke‐Lei Cao, Di Zheng, Yi Zhu, Shi‐Ze Xie, Xiao‐Dan Yu, Hao Wang, Jia‐Dong Chen, Jie Shi, Yue Li, Min Yan, Xiao‐Ming Li   +13 more
wiley   +1 more source

Quantifying the Contamination from nearby Stellar Companions in Gaia DR3 Photometry

The Astronomical Journal
Identifying and removing binary stars from stellar samples is a crucial but complicated task. Regardless of how carefully a sample is selected, some binaries will remain and complicate interpretation of results, especially via flux contamination of ...
Kendall Sullivan, Adam L. Kraus, Travis A. Berger, Daniel Huber   +3 more
doaj   +1 more source

Astrocytic PERK Deficiency Drives Prefrontal Circuit Dysfunction and Depressive‐Like Behaviors

Advanced Science, EarlyView.
Chen et al. show that the endoplasmic reticulum (ER) stress sensor PERK is downregulated in prefrontal cortex (PFC) astrocytes in major depressive disorder and in chronic‐stress mouse models. In young mice, astrocyte‐specific PERK loss reduces the synaptogenic cue thrombospondin‐1 (TSP1), leading to synaptic and circuit deficits and depressive‐like ...
Kai Chen, Riya Gupta, Yosuke M. Morizawa, Yu Qin, Xingyu Du, Cynthia Pang, Osama Al‐Dalahmah, Maura B. Dupont, Guang Yang   +8 more
wiley   +1 more source

Subicular Astrocytes Govern Seizure‐Impaired Fear Memory

Advanced Science, EarlyView.
Astrocytes in dorsal subiculum act as a critical modulator of seizure‐associated cognitive dysfunction, operating through a Ca2+‐dependent adenosine‐linked astrocyte‐neuron signaling pathway that disrupts neuronal circuit homeostasis. This research highlights the potential of astrocyte‐targeted interventions as a therapeutic strategy, moving beyond the
Yuying Shao, Jing Xi, Yuhao Sun, Yulan Li, Zhisheng Li, Wangjialu Lu, Jialu Chen, Lin Yang, Fan Fei, Heming Cheng, Li Cheng, Cenglin Xu, Zhuo Huang, Vladimir Parpura, Yi Wang, Zhong Chen   +15 more
wiley   +1 more source