Results 51 to 60 of about 70,958 (245)

A Luminous and Hot Infrared through X-Ray Transient at a 5 kpc Offset from a Dwarf Galaxy

The Astrophysical Journal
We are searching for hot, constant-color, offset optical flares in the Zwicky Transient Facility data stream that are >10″ from any galaxy in public imaging data from the PanSTARRS survey. Here, we present the first discovery from this search: AT 2024puz,
Jean J. Somalwar, Vikram Ravi, Raffaella Margutti, Ryan Chornock, Priyamvada Natarajan, Wenbin Lu, Charlotte Angus, Matthew J. Graham, Erica Hammerstein, Edward Nathan, Matt Nicholl, Kritti Sharma, Robert Stein, Frank Verdi, Yuhan Yao, Eric C. Bellm, Tracy X. Chen, Michael W. Coughlin, David Hale, Mansi M. Kasliwal, Russ R. Laher, Reed Riddle, Jesper Sollerman   +22 more
doaj   +1 more source

Photoswitchable Conductive Metal–Organic Frameworks

Advanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu, Mersad Mostaghimi, Abhinav Chandresh, Saibal Jana, Wolfgang Wenzel, Lars Heinke   +5 more
wiley   +1 more source

Formation Rate of Quasiperiodic Eruptions in Galactic Nuclei Containing Single and Dual Supermassive Black Holes

The Astrophysical Journal Letters
Quasiperiodic eruptions (QPEs) are a novel class of transients recently discovered in a few extragalactic nuclei. It has been suggested that a QPE can be produced by a main-sequence star undergoing repeated partial disruptions by the tidal field of a ...
Chunyang Cao, F. K. Liu, Xian Chen, Shuo Li   +3 more
doaj   +1 more source

Understanding the Death of Massive Stars Using an Astrophysical Transients Observatory

Frontiers in Astronomy and Space Sciences, 2018
The death of massive stars, manifested as gamma-ray bursts and core-collapse supernovae, critically influence how the universe formed and evolves. Despite their fundamental importance, our understanding of these enigmatic objects is severely limited.
Peter W. A. Roming, Eddie Baron, Amanda J. Bayless, Volker Bromm, Peter J. Brown, Michael W. Davis, Anastasia Fialkov, Brian Fleming, Kevin France, Chris L. Fryer, Thomas K. Greathouse, Jed J. Hancock, D. Andrew Howell, D. Andrew Howell, Andrew J. Levan, Abraham Loeb, Raffaella Margutti, Mark L. McConnell, Paul T. O'Brien, Julian P. Osborne, Daniel A. Perley, Eric M. Schlegel, Rhaana L. C. Starling, Nial R. Tanvir, Mark Tapley, Patrick A. Young, Bing Zhang   +26 more
doaj   +1 more source

H_2 Absorption and Fluorescence for Gamma Ray Bursts in Molecular Clouds [PDF]

, 1999
If a gamma ray burst with strong UV emission occurs in a molecular cloud, there will be observable consequences resulting from excitation of the surrounding H2. The UV pulse from the GRB will pump H2 into vibrationally-excited levels which produce strong
Abgrall H, Abgrall H, B. T. Draine, Bottcher M., Habing H. J., Israel G. L., Jansen D. J., Rodgers C. D.   +7 more
core   +2 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Exploring the multiparameter nature of EUV-visible wave mixing at the FERMI FEL

Structural Dynamics, 2019
The rapid development of extreme ultraviolet (EUV) and x-ray ultrafast coherent light sources such as free electron lasers (FELs) has triggered the extension of wave-mixing techniques to short wavelengths.
L. Foglia, F. Capotondi, H. Höppner, A. Gessini, L. Giannessi, G. Kurdi, I. Lopez Quintas, C. Masciovecchio, M. Kiskinova, R. Mincigrucci, D. Naumenko, I. P. Nikolov, E. Pedersoli, G. M. Rossi, A. Simoncig, F. Bencivenga   +15 more
doaj   +1 more source

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

Probing the Subparsec Dust of a Supermassive Black Hole with the Tidal Disruption Event AT 2020mot

The Astrophysical Journal
AT 2020mot is a typical UV/optical tidal disruption event (TDE) with no radio or X-ray signatures in a quiescent host. We find an i -band excess and rebrightening along the decline of the light curve which could be due to two consecutive dust echoes from
Megan Newsome, Iair Arcavi, D. Andrew Howell, Jamison Burke, Kishalay De, Yael Dgany, Sara Faris, Joseph Farah, Daichi Hiramatsu, Curtis McCully, Estefania Padilla-Gonzalez, Craig Pellegrino, Giacomo Terreran   +12 more
doaj   +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