scholarly journals The Chinese Giant Solar Telescope

2013 ◽  
Vol 8 (S300) ◽  
pp. 349-354 ◽  
Author(s):  
Zhong Liu ◽  
Yuanyong Deng ◽  
Haisheng Ji
Keyword(s):  
Near Infrared ◽  
Solar Magnetic Field ◽  
Solar Telescope ◽  
Current Design ◽  
Fine Structures ◽  
Circular System ◽  
Guide Star ◽  
Laser Guide ◽  
Polarization Detection

AbstractChinese Giant Solar Telescope is the next generation ground-based solar telescope. The main science task of this telescope is to observe the ultra fine structures of the solar magnetic field and dynamic field. Due to the advantages in polarization detection and thermal controlling with a symmetrical circular system, the current design of CGST is a 6~8 meter circular symmetrical telescope. The results of simulations and analysis showed that the current design could meet the demands of most science cases not only in infrared bands but also in near infrared bands and even in visible bands. The prominences and the filaments are very important science cases of CGST. The special technologies for prominence observation will be developed, including the day time laser guide star and MCAO. CGST is proposed by all solar observatories and several institutes and universities in China. It is supported by CAS and NSFC (National Natural Science Foundation of China) as a long term astronomical project.

scholarly journals A near-infrared tip-tilt sensor for the Keck I laser guide star adaptive optics system

2014 ◽  
Author(s):  
Peter Wizinowich ◽  
Roger Smith ◽  
Roberto Biasi ◽  
Sylvain Cetre ◽  
Richard Dekany ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Laser Guide Star ◽  
Tilt Sensor ◽  
Guide Star ◽  
Laser Guide ◽  
Adaptive Optics System

scholarly journals High-resolution survey for planetary companions to young stars in the Taurus molecular cloud

2020 ◽  
Vol 498 (1) ◽  
pp. 1382-1396
Author(s):  
A L Wallace ◽  
J Kammerer ◽  
M J Ireland ◽  
C Federrath ◽  
A L Kraus ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Semimajor Axis ◽  
Infrared Camera ◽  
Single Class ◽  
Hot Start ◽  
Guide Star ◽  
Laser Guide ◽  
Large Telescopes ◽  
Differential Imaging

ABSTRACT Direct imaging in the infrared at the diffraction limit of large telescopes is a unique probe of the properties of young planetary systems. We survey 55 single class I and class II stars in Taurus in the L’ filter using natural and laser guide star adaptive optics and the near-infrared camera (NIRC2) of the Keck II telescope, in order to search for planetary-mass companions. We use both reference star differential imaging and kernel phase techniques, achieving typical 5σ contrasts of ∼6 mag at separations of 0.2 arcsec and ∼8 mag beyond 0.5 arcsec. Although, we do not detect any new faint companions, we constrain the frequency of wide separation massive planets, such as HR 8799 analogues. We find that, assuming hot-start models and a planet distribution with power-law mass and semimajor axis indices of −0.5 and −1, respectively, less than 20 per cent of our target stars host planets with masses >2 MJ at separations >10 au.

scholarly journals First results from Project SUNBIRD: Supernovae UNmasked By Infra-Red Detection

2016 ◽  
Vol 12 (S329) ◽  
pp. 416-416
Author(s):  
Erik C. Kool ◽  
Stuart D. Ryder ◽  
Erkki Kankare ◽  
Seppo Mattila
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Infrared Galaxies ◽  
Dust Extinction ◽  
Luminous Infrared Galaxies ◽  
First Results ◽  
Nuclear Regions ◽  
Guide Star ◽  
Laser Guide ◽  
Optical Surveys

AbstractA substantial number of core-collapse supernovae (CCSNe) are expected to be hosted by starbursting luminous infrared galaxies (LIRGs). However, so far very few CCSNe have been discovered in LIRGs, most likely as a result of dust extinction and lack of contrast in their typically luminous and complex nuclear regions. We present the first results of Project SUNBIRD (Supernovae UNmasked By InfraRed Detection), where we aim to uncover dust-obscured nuclear supernovae by monitoring over 30 LIRGs, using near-infrared state-of-the-art Laser Guide Star Adaptive Optics (LGSAO) imaging on the Gemini South and Keck telescopes. Such discoveries are vital for determining the fraction of supernovae which will be missed as a result of dust obscuration by current and future optical surveys.

Experimental Demonstration of Real Time Gradient Gain Correction for Sodium Beacon Laser Guide Star: Postprint

2010 ◽  
Author(s):  
Katia Shtyrkova ◽  
Michael D. Oliker ◽  
Kevin P. Vitayaudom ◽  
Denis W. Oesch ◽  
Darryl J. Sanchez ◽  
...  
Keyword(s):  
Real Time ◽  
Experimental Demonstration ◽  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide

Association of Serum PCSK9 with Near-Infrared Spectroscopy Derived Lipid Core Burden Index and Long-Term Cardiac Outcome

2019 ◽  
Author(s):  
Sharda S. Anroedh ◽  
Rohit M. Oemrawsingh ◽  
Robert-Jan van Geuns ◽  
Jin M. Cheng ◽  
Hector M. Garcia-Garcia ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Lipid Core ◽  
Cardiac Outcome

scholarly journals Time-Programmed Delivery of Sorafenib and Anti-CD47 Antibody via a Double-Layer-Gel Matrix for Postsurgical Treatment of Breast Cancer

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Liping Huang ◽  
Yiyi Zhang ◽  
Yanan Li ◽  
Fanling Meng ◽  
Hongyu Li ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Near Infrared ◽  
Immune Escape ◽  
Regulatory Protein ◽  
In Vivo Studies ◽  
Breast Cancer Patients ◽  
Thermally Responsive ◽  
Immunosuppressive Microenvironment

AbstractThe highly immunosuppressive microenvironment after surgery has a crucial impact on the recurrence and metastasis in breast cancer patients. Programmable delivery of immunotherapy-involving combinations through a single drug delivery system is highly promising, yet greatly challenging, to reverse postoperative immunosuppression. Here, an injectable hierarchical gel matrix, composed of dual lipid gel (DLG) layers with different soybean phosphatidylcholine/glycerol dioleate mass ratios, was developed to achieve the time-programmed sequential delivery of combined cancer immunotherapy. The outer layer of the DLG matrix was thermally responsive and loaded with sorafenib-adsorbed graphene oxide (GO) nanoparticles. GO under manually controlled near-infrared irradiation generated mild heat and provoked the release of sorafenib first to reeducate tumor-associated macrophages (TAMs) and promote an immunogenic tumor microenvironment. The inner layer, loaded with anti-CD47 antibody (aCD47), could maintain the gel state for a much longer time, enabling the sustained release of aCD47 afterward to block the CD47-signal regulatory protein α (SIRPα) pathway for a long-term antitumor effect. In vivo studies on 4T1 tumor-bearing mouse model demonstrated that the DLG-based strategy efficiently prevented tumor recurrence and metastasis by locally reversing the immunosuppression and synergistically blocking the CD47-dependent immune escape, thereby boosting the systemic immune responses.

scholarly journals Modeling low order aberrations in laser guide star adaptive optics systems

2007 ◽  
Vol 15 (8) ◽  
pp. 4711 ◽  
Author(s):  
Richard M. Clare ◽  
Marcos A. van Dam ◽  
Antonin H. Bouchez
Keyword(s):  
Adaptive Optics ◽  
Laser Guide Star ◽  
Guide Star ◽  
Laser Guide ◽  
Low Order

Near-infrared persistent luminescence hollow mesoporous nanospheres for drug delivery and in vivo renewable imaging

2016 ◽  
Vol 4 (48) ◽  
pp. 7845-7851 ◽  
Author(s):  
Junpeng Shi ◽  
Meng Sun ◽  
Xia Sun ◽  
Hongwu Zhang
Keyword(s):  
Drug Delivery ◽  
Near Infrared ◽  
High Sensitivity ◽  
Drug Carriers ◽  
Template Method ◽  
Persistent Luminescence ◽  
Deep Tissue ◽  
Large Capacity

Near-infrared persistent luminescence hollow mesoporous nanospheres have been synthesized via a template method. These nanospheres can be used as large capacity drug carriers and realize super long-term and high sensitivity tracking of drug delivery in deep tissue.

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