Results 71 to 80 of about 70,469 (251)

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

ULTRASAT: A Wide-field Time-domain UV Space Telescope

The Astrophysical Journal
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2027. It will carry a telescope with an unprecedentedly large field of view (204 deg ^2 ) and near-ultraviolet (NUV; 230–290 nm) sensitivity ...
Y. Shvartzvald, E. Waxman, A. Gal-Yam, E. O. Ofek, S. Ben-Ami, D. Berge, M. Kowalski, R. Bühler, S. Worm, J. E. Rhoads, I. Arcavi, D. Maoz, D. Polishook, N. Stone, B. Trakhtenbrot, M. Ackermann, O. Aharonson, O. Birnholtz, D. Chelouche, D. Guetta, N. Hallakoun, A. Horesh, D. Kushnir, T. Mazeh, J. Nordin, A. Ofir, S. Ohm, D. Parsons, A. Pe’er, H. B. Perets, V. Perdelwitz, D. Poznanski, I. Sadeh, I. Sagiv, S. Shahaf, M. Soumagnac, L. Tal-Or, J. Van Santen, B. Zackay, O. Guttman, P. Rekhi, A. Townsend, A. Weinstein, I. Wold   +43 more
doaj   +1 more source

The Robo-AO-2 facility for rapid visible/near-infrared AO imaging and the demonstration of hybrid techniques [PDF]

, 2018
We are building a next-generation laser adaptive optics system, Robo-AO-2, for the UH 2.2-m telescope that will deliver robotic, diffraction-limited observations at visible and near-infrared wavelengths in unprecedented numbers.
Baranec, Christoph, Chun, Mark, Connelley, Michael, de Pater, Imke, Dekany, Richard, Griffiths, Richard, Guyon, Olivier, Hall, Donald, Hammel, Heidi, Hodapp, Klaus, Huber, Daniel, Kasliwal, Mansi, Kissler-Patig, Markus, Kuchner, Marc, Lau, Ryan, Law, Nicholas M., Liu, Michael, Magnier, Eugene, Meech, Karen, Moore, Anna, Ofek, Eran, Riddle, Reed, Simon, Amy, Takamiya, Marianne, van Dam, Marcos A., Wong, Mike   +25 more
core   +1 more source

Demonstration of an All‐Optical AND Gate Mediated by Photochromic Molecules

Advanced Functional Materials, EarlyView.
A logic AND gate that runs on photons is demonstrated. It relies on two spatially separated photochromic molecules that work in tandem. Abstract The realization of a photonic logic AND gate, i.e. a logic AND gate that runs on photons rather than electrons, and where all steps are controlled by light, is demonstrated. In a proof‐of‐principle experiment,
Heyou Zhang, Max Gießübel, Pankaj Dharpure, Andrea Albert, Vira Niestierkina, Paul Mulvaney, Mukundan Thelakkat, Jürgen Köhler   +7 more
wiley   +1 more source

The Optical to X-Ray Luminosity and Spectrum of Supernova Wind Breakouts

The Astrophysical Journal
Observations indicate that an optically thick circumstellar medium (CSM) at radii of 10 ^14 –10 ^15 cm around Type II core-collapse supernova (SN) progenitors is common (and may be present in other types of massive star explosions).
Tal Wasserman, Nir Sapir, Peter Szabo, Eli Waxman   +3 more
doaj   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

The Early Ultraviolet Light Curves of Type II Supernovae and the Radii of Their Progenitor Stars

The Astrophysical Journal
We present a sample of 34 normal Type II supernovae (SNe II) detected with the Zwicky Transient Facility, with multiband UV light curves starting at t ≤ 4 days after explosion, and X-ray observations.
Ido Irani, Jonathan Morag, Avishay Gal-Yam, Eli Waxman, Steve Schulze, Jesper Sollerman, K-Ryan Hinds, Daniel A. Perley, Ping Chen, Nora L. Strotjohann, Ofer Yaron, Erez A. Zimmerman, Rachel Bruch, Eran O. Ofek, Maayane T. Soumagnac, Yi Yang, Steven L. Groom, Frank J. Masci, Marie Aubert, Reed Riddle, Eric C. Bellm, David Hale   +21 more
doaj   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

Circumstellar Interaction in the Ultraviolet Spectra of SN 2023ixf 14–66 Days After Explosion

The Astrophysical Journal Letters
SN 2023ixf was discovered in M101 within a day of the explosion and rapidly classified as a Type II supernova with flash features. Here we present ultraviolet (UV) spectra obtained with the Hubble Space Telescope 14, 19, 24, and 66 days after the ...
K. Azalee Bostroem, David J. Sand, Luc Dessart, Nathan Smith, Saurabh W. Jha, Stefano Valenti, Jennifer E. Andrews, Yize Dong, Alexei V. Filippenko, Sebastian Gomez, Daichi Hiramatsu, Emily T. Hoang, Griffin Hosseinzadeh, D. Andrew Howell, Jacob E. Jencson, Michael Lundquist, Curtis McCully, Darshana Mehta, Nicolas E. Meza-Retamal, Jeniveve Pearson, Aravind P. Ravi, Manisha Shrestha, Samuel Wyatt   +22 more
doaj   +1 more source

Measurements of H2O in the terrestrial mesosphere and implications for extra-terrestrial sources [PDF]

Recent measurements of mesospheric water vapor and their implications for the existence of extraterrestrial sources of water are discussed. This study was prompted by the work of L.
Olivero, John J.
core   +1 more source