Results 61 to 70 of about 8,356 (263)

Characterizing the Near-infrared Spectra of Flares from TRAPPIST-1 during JWST Transit Spectroscopy Observations

The Astrophysical Journal, 2023
We present the first analysis of JWST near-infrared spectroscopy of stellar flares from TRAPPIST-1 during transits of rocky exoplanets. Four flares were observed from 0.6–2.8 μ m with the Near Infrared Imager and Slitless Spectrograph and 0.6–3.5 μ m ...
Ward S. Howard, Adam F. Kowalski, Laura Flagg, Meredith A. MacGregor, Olivia Lim, Michael Radica, Caroline Piaulet, Pierre-Alexis Roy, David Lafrenière, Björn Benneke, Alexander Brown, Néstor Espinoza, René Doyon, Louis-Philippe Coulombe, Doug Johnstone, Nicolas B. Cowan, Ray Jayawardhana, Jake D. Turner, Lisa Dang   +18 more
doaj   +1 more source

A near-infrared interferometric survey of debris disc stars. III. First statistics based on 42 stars observed with CHARA/FLUOR [PDF]

, 2013
peer reviewedContext. Dust is expected to be ubiquitous in extrasolar planetary systems due to the dynamical activity of minor bodies. Inner dust populations are, however, still poorly known due to the high contrast and small angular separation with ...
Mérand, Antoine, Augereau, J. -C., Sturmann, Laszlo, Hanot, C., Monnier, J. D., E. Di Folco, Augereau, Jean-Charles, C. Hanot, J.-C. Augereau, McAlister, Harold, Mollier, Benjamin, Tuthill, Peter, Che, X., Tuthill, P. G., J. D. Monnier, Absil, O., Monnier, John, N. Turner, Kervella, Pierre, P. Kervella, Ertel, Steve, Sturmann, Judit, L. Sturmann, Absil, Olivier, Scott, Nicholas, Ertel, S., Defrère, D., Foresto, V. Coudé Du, V. Coudé du Foresto, Sturmann, L., ten Brummelaar, T. A., H. A. McAlister, Che, Xiao, ten Brummelaar, Theo, McAlister, H. A., Mérand, A., B. Mollier, D. Defrère, Scott, N., Thureau, N., Di Folco, E., P. G. Tuthill, Mollier, B., Coudé du Foresto, Vincent, Kervella, P., Turner, N., Brummelaar, T. A. Ten, A. Mérand, Turner, Nils, T. A. ten Brummelaar, Defrere, Denis, Scott, Nicholas William, N. Scott, Hanot, Charles, O. Absil, Coudé du Foresto, V., Thureau, Nathalie Danielle, N. Thureau, S. Ertel, X. Che, Di Folco, Emmanuel, Thureau, Nathalie, Sturmann, J., J. Sturmann   +63 more
core   +1 more source

Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl

The Astrophysical Journal
We present ultraviolet (UV) through near-infrared (NIR) photometric and spectroscopic observations of the nearby SN 2024pxl, the third Type Ia supernova (SN Ia) in NGC 6384.
W. B. Hoogendam, C. Ashall, D. O. Jones, B. J. Shappee, M. A. Tucker, M. E. Huber, K. Auchettl, D. D. Desai, A. Do, J. T. Hinkle, M. Y. Kong, S. Romagnoli, J. Shi, A. Syncatto, C. D. Kilpatrick   +14 more
doaj   +1 more source

The THESEUS Space Mission and the Infrared Telescope Calibration Unit

Astronomische Nachrichten, EarlyView.
ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó, Rebeka Gyöngyi Kiss, Lorenzo Amati, Bendegúz Koncz, Örs Detre, Gyula Zilizi, Zsolt Bagoly, István I. Rácz, Sándor Pintér, L. Viktor Tóth   +9 more
wiley   +1 more source

NIRC2 Interferometric Imaging of the HD 34282 Transition Disk’s Small Grain Structure

The Astrophysical Journal
The HD 34282 transition disk is a favorable location for protoplanet searches given its complex substructures that may be driven by planet formation.
Christina L. Vides, Steph Sallum, Josh Eisner, Andy Skemer, Ruth Murray-Clay   +4 more
doaj   +1 more source

Development of TiN-Based Suspended Meander Kinetic Inductance Detectors (KIDs) for Visible and Near-Infrared Astronomy Applications

, 2023
Abstract We propose high-Q factors sub-stoichiometric TiN-based Lumped Element MKIDs on sapphire with vacuum gap suspended meander. The aim is to improve detector response by trapping phonons within the meander to increase the number of Cooper pairs breaking into quasiparticles.
Maria Appavou, Lucas Ribeiro, Paul Nicaise, Jie Hu, Jean-Marc Martin, Josiane Firminy, Christine Chaumont, Piercarlo Bonifacio, Faouzi Boussaha   +8 more
openaire   +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

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

Analysis of the astroclimate parameters associated with the tropospheric conditions and their time evolution at Roque de Los Muchachos Observatory [PDF]

, 2012
The early 1970's saw the start of a new era in astronomy with the rst approach to building large telescopes (2 to 5 meters class telescope) and locating them in the right places.
GUERRA-RAMON, JUAN,CARLOS, Guerra-Ramon, Juan Carlos   +1 more
core  

Near-infrared spectroscopy of young brown dwarfs in upper Scorpius

, 2014
This work was supported by Science Foundation Ireland within the Research Frontiers Programme under grant no. 10/RFP/AST2780.Spectroscopic follow-up is a pre-requisite for studies of the formation and early evolution of brown dwarfs.
Rodgers-Lee, D., Ray, T. P., Geers, V., Scholz, A., Dawson, P., Peterson, D. E.   +5 more
core   +1 more source