Results 91 to 100 of about 5,110 (265)

The Top Ten Astronomical 'breakthroughs' of the 20th century

Communicating Astronomy with the Public Journal, 2007
Astronomy was revolutionized in the 20th century. The electron was discovered in 1897 and this transformed spectroscopy and introduced plasma and magnetohydrodynamic physics and astro-chemistry.
Hughes, D. W., de Grijs, Richard
doaj  

Lyman Continuum Leakers in the AstroSat Ultraviolet Deep Field: Extreme-ultraviolet Emitters at the Cosmic Noon

The Astrophysical Journal Letters
We report the direct detection of Lyman continuum (LyC) emission from nine galaxies and one active galactic nucleus at z ∼ 1.1–1.6 in the GOODS-North field using deep observations from the Ultraviolet Imaging Telescope (UVIT) on board AstroSat.
Suraj Dhiwar, Kanak Saha, Soumil Maulick, Brent M. Smith, Chayan Mondal, Harry I. Teplitz, Marc Rafelski, Rogier A. Windhorst   +7 more
doaj   +1 more source

Single‐Particle Insights Into the Electronic Structure and Enhanced Stability of CsPbBr3/FAPbBr3 Core/Crown Nanoplatelets at the Nanometer Scale

Small, EarlyView.
Single‐particle‐level investigation using scanning tunneling spectroscopy reveals electronic structure and type‐I band alignment of individual CsPbBr3@FAPbBr3 core‐crown nanoplatelet. Crown passivation suppresses deep trap states by 47% and markedly improves electrical stability under repeated bias sweeps.
Shaocheng Shen, Anuraj S. Kshirsagar, John Michael Lane, Chenguang Zhang, Haixin Zhang, Kedar Hippalgaonkar, Neeraj Rai, Mahesh K. Gangishetty, Kun Wang   +8 more
wiley   +1 more source

Coronal Magnetometry with EUV Permitted Lines

The Astrophysical Journal
A major challenge in solar physics is to obtain empirical information on the magnetic field of the million-degree plasma of the solar corona. To this end, we need observables of the solar radiation sensitive to the coronal magnetic field.
Nataliia G. Shchukina, Javier Trujillo Bueno, Supriya Hebbur Dayananda, Rafael Manso Sainz, Andrii V. Sukhorukov   +4 more
doaj   +1 more source

Does ultraviolet astronomy have a future? [PDF]

Astronomy and Geophysics, 2004
Recent news of the cancellation of further servicing missions for HST and the recent failure of its prime UV spectrograph has brought into focus the limited future for UV astronomy, without rapid action. If this situation does not change, the routine access to the far-UV that we have enjoyed for more than 25 years, since the launch of IUE, will end by ...
openaire   +2 more sources

Invisible Misconceptions: Student Understanding of Ultraviolet and Infrared Radiation

, 2011
The importance of nonvisible wavelengths for the study of astronomy suggests that student understanding of nonvisible light is an important consideration in astronomy classrooms.
Libarkin, Julie C., Sadler, Philip M., Asghar, Anila, Crockett, Cynthia   +3 more
core  

Experimental and Analytical Studies of Merging Plasma Loops on the Caltech Solar Loop Experiment [PDF]

, 2011
Of crucial importance for magnetized plasmas is magnetic helicity, a topological quantity that measures the knottedness or twistedness of the magnetic field. A universal relaxation theory, applicable to astrophysical and laboratory plasmas, dictates the
Perkins, Rory James
core   +1 more source

Lithium Ion‐Conducting Triazacoronene‐Based Neutral 2D Covalent Organic Framework as a Solid‐State Electrolyte

Small, EarlyView.
A new 2D COF based on hexamethoxy triazacoronene (HMTAC) exhibits impressive ionic conductivity (10−4 S/cm), activation energy (0.25 eV), Li+ transference number (0.57), as well as promising specific capacity of 181 mAh/g with >99% Coulombic efficiency when employed as a solid‐state electrolyte in a Li || Li+@HMTAC‐COF1 || LiFePO4 cells, outperforming ...
Jonathan L. Cromer, Ashok Yadav, Janak Basel, Mohd A. H. Ansari, Mihir Parekh, Jorge Barroso, Apparao M. Rao, Sourav Saha   +7 more
wiley   +1 more source

Systemic effects of sunlight: 10‐year review of cardiovascular, infection and cancer outcomes

Journal of the European Academy of Dermatology and Venereology, EarlyView.
This review highlights the systemic effects of sunlight and ultraviolet radiation. While UV radiation exposure has known cutaneous risks including photoaging and skin cancer, evidence suggests potential associations with reduced all‐cause mortality, improved infectious disease outcomes and reduced blood pressure.
Jasira A. Ziglar, Rebecca L. Quiñonez, Lydiah Fridah M. Mpyisi, Indermeet Kohli, Yolanda Gilaberte, Henry W. Lim   +5 more
wiley   +1 more source

Research in extreme ultraviolet and far ultraviolet astronomy

, 1985
Instruments designed to explore different aspects of far and extreme ultraviolet cosmic radiation were studied. The far ultraviolet imager (FUVI) was flown on the Aries sounding rocket. Its unique large format 75mm detector mapped out the far ultraviolet
Labov, S. E.
core   +2 more sources