Results 71 to 80 of about 2,634 (203)

Probing the fluctuating ultraviolet background using the Hubble Frontier Fields [PDF]

, 2019
In recent years, the rise in the number of Lyman Break Galaxies detected at high redshifts z ≥ 6 has opened up the possibility of understanding early galaxy formation physics in great detail.
Dayal, Pratika, Choudhury, Tirthankar Roy   +1 more
core   +1 more source

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, EarlyView.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, EarlyView.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley   +1 more source

Water Production Rates of the Interstellar Object 3I/ATLAS

The Astrophysical Journal Letters
We report the detection of water activity in the third confirmed interstellar object, 3I/ATLAS, based on ultraviolet imaging with the Neil Gehrels Swift Observatory’s Ultraviolet/Optical Telescope. Assuming a reddening of 29% between 3325.7 and 5437.8 Å,
Zexi Xing, Shawn Oset, John Noonan, Dennis Bodewits   +3 more
doaj   +1 more source

Comprehensive Observations Of The Bright And Energetic Type Lax Sn 2012Z: Interpretation As A Chandrasekhar Mass White Dwarf Explosion [PDF]

, 2014
We present ultraviolet through near-infrared (NIR) broadband photometry, and visual-wavelength and NIR spectroscopy of the Type lax supernova (SN) 2012Z.
Baron, E., Jha, S. W., G. H. Marion, N. Morrell, Valenti, S., Stritzinger, M. D., F. Foerster, Forster, F., C. R. Burns, C. McCully, Contreras, C., Foerster, F., V. Pandya, Holmbo, S., S. Holmbo, P. Hoeflich, S. W. Jha, Pandya, V., M. M. Phillips, Campillay, A., Simon, J. D., Benetti, S., Burns, C. R., M. D. Stritzinger, S. Valenti, G. Pignata, P. J. Brown, Phillips, M. M., R. J. Foley, E. Baron, Taddia, F., E. Y. Hsiao, F. Taddia, C. Contreras, Foley, R. J., Francesco Taddia, S. Benetti, Hsiao, E. Y., McCully, C., F. Förster, Marion, G. H., Brown, P. J., Taddia, Francesco,, A. Campillay, Pignata, G., Hoeflich, P., J. D. Simon, BENETTI, Stefano, Morrell, N.   +48 more
core   +1 more source

Probing the Influence of Sulfur–Aromatic Interactions on the Electronic Structure of Gas‐Phase Peptides

Chemistry – A European Journal, EarlyView.
Just as fingerprints reveal identity, spectroscopic fingerprints reveal molecular secrets. In this article, we show parts of the unique fingerprint of the sulfur–aromatic interaction. By measuring how this force alters the electronic structure of gas‐phase peptides, we provide a fundamental understanding of interactions that give insights into the ...
Laura Pille, Carlos Ortiz‐Mahecha, Bart Oostenrijk, Juliette Leroux, Marion Girod, Konstantin Hirsch, Luke MacAleese, Robert Horst Meißner, Debora Scuderi, Isaak Unger, Vicente Zamudio‐Bayer, Sadia Bari, Lucas Schwob   +12 more
wiley   +1 more source

Bioverse: Potentially Observable Exoplanet Biosignature Patterns under the UV Threshold Hypothesis for the Origin of Life

The Astrophysical Journal
A wide variety of scenarios for the origin of life have been proposed, with many influencing the prevalence and distribution of biosignatures across exoplanet populations.
Martin Schlecker, Dániel Apai, Antonin Affholder, Sukrit Ranjan, Régis Ferrière, Kevin K. Hardegree-Ullman, Tim Lichtenberg, Stéphane Mazevet   +7 more
doaj   +1 more source

Diagnostics of Collisions between Electrons and Water Molecules in Near-ultraviolet and Visible Wavelengths

, 2019
We studied the dissociation reactions of electron impact on water vapor for several fragment species at optical and near-ultraviolet wavelengths (200?850 nm). The resulting spectrum is dominated by the hydrogen Balmer series, by the OH (A (2)?(+);?;X (2)?
Országh, J., Noonan, J., Matejčík, Š., Bodewits, D., Noonan, John, Ďurian, M., Ďurian, Michal, Matejčík, Štefan, Bodewits, Dennis, Országh, Juraj   +9 more
core   +1 more source

Auroral streamers and magnetic flux closure [PDF]

, 2007
peer reviewedOn 7 December 2000 at 2200 UT an auroral streamer was observed to develop above Scandinavia with the IMAGE-FUV global imagers. The ionospheric equivalent current deduced from the MIRACLE-IMAGE Scandinavian ground-based network of ...
Kauristie, K., Hubert, Benoît, Hubert, B., Milan, S. E., S. W. H. Cowley (7590302), Steve E. Milan (7589666), Grocott, A., Adrian Grocott (7590026), Pulkkinen, T. I., Cowley, S. W. H., B. Hubert (7590023), O. Amm (7591346), K. Kauristie (7591778), Amm, O., T. I. Pulkkinen (7591781)   +14 more
core   +1 more source

Synergistic Engineering of Oxygen Vacancies and Topological Surface States in Bi2Te3/TiO2‐X Heterostructures for Highly Efficient Photothermal‐Driven CO2 Photoreduction

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Integrating the topological insulator Bi2Te3 with oxygen‐deficient TiO2‐X creates a synergistic platform for full‐spectrum CO2 reduction, achieving high‐selectivity C2+ production via enhanced photothermal catalysis and tailored charge dynamics.
Bingke Zhang, Chenchen Zhao, Jing Qiao, Changcun Li, Yang Wang, Xingshuo Liu, Dongbo Wang, Gang Liu, Zhao Qian, Rajeev Ahuja, Jinzhong Wang, Degang Zhao   +11 more
wiley   +1 more source