Zobrazeno 1 - 10
of 14 379
pro vyhledávání: '"Ric A"'
Publikováno v:
SPIE Proceedings #13097, 2024
MICADO, the European Extremely Large Telescope first light imager will feature a dedicated high contrast imaging mode specifically designed for observing and characterizing exoplanets and circumstellar disks. Its improved sensitivity and angular reso
Externí odkaz:
http://arxiv.org/abs/2411.13709
Autor:
The GRAVITY Collaboration, Dayem, Karim Abd El, Abuter, Roberto, Aimar, Nicolas, Seoane, Pau Amaro, Amorim, Antonio, Beck, Julie, Berger, Jean Philippe, Bonnet, Henri, Bourdarot, Guillaume, Brandner, Wolfgang, Cardoso, Vitor, Dolcetta, Roberto Capuzzo, Clénet, Yann, Davies, Ric, de Zeeuw, Tim, Drescher, Antonia, Eckart, Andreas, Eisenhauer, Frank, Feuchtgruber, Helmut, Finger, Gert, Schreiber, Natascha M. Förster, Foschi, Arianna, Gao, Feng, Garcia, Paulo, Gendron, Eric, Genzel, Reinhard, Gillessen, Stefan, Hartl, Michael, Haubois, Xavier, Haussman, Frank, Heißel, Gernot, Hennig, Thomas, Hippler, Stefan, Horrobin, Matthew, Jochum, Lieselotte, Jocou, Laurent, Kaufer, Andreas, Kervella, Pierre, Lacour, Sylvestre, Lapeyrère, Vincent, Bouquin, Jean B. Le, Léna, Pierre, Lutz, Dieter, Mang, Felix, More, Nikhil, Ott, Thomas, Paumard, Thibaut, Perraut, Karine, Perrin, Guy, Pfuhl, Oliver, Rabien, Sebastien, Ribeiro, Diogo C., Bordoni, Matteo Sadun, Scheithauer, Silvia, Shangguan, Jinyi, Shimizu, Taro, Stadler, Julia, Straub, Odele, Straubmeier, Christian, Sturm, Eckhard, Tacconi, Linda J., Urso, Irene, Vincent, Frederic, Von Fellenberg, Sebastiano D., Widmann, Felix, Wieprecht, Ekkehard, Woillez, Julien, Zhang, Fupeng
Studying the orbital motion of stars around Sagittarius A* in the Galactic Center provides a unique opportunity to probe the gravitational potential near the supermassive black hole at the heart of our Galaxy. Interferometric data obtained with the G
Externí odkaz:
http://arxiv.org/abs/2409.12261
Autor:
Zhang, Lulu, García-Bernete, Ismael, Packham, Chris, Donnan, Fergus R., Rigopoulou, Dimitra, Hicks, Erin K. S., Davies, Ric I., Shimizu, Taro T., Alonso-Herrero, Almudena, Almeida, Cristina Ramos, Pereira-Santaella, Miguel, Ricci, Claudio, Bunker, Andrew J., Leist, Mason T., Rosario, David J., García-Burillo, Santiago, Muñoz, Laura Hermosa, Combes, Francoise, Imanishi, Masatoshi, Labiano, Alvaro, Esparza-Arredondo, Donaji, Bellocchi, Enrica, Audibert, Anelise, Fuller, Lindsay, González-Martín, Omaira, Hönig, Sebastian, Izumi, Takuma, Levenson, Nancy A., López-Rodríguez, Enrique, Rouan, Daniel, Stalevski, Marko, Ward, Martin J.
We analyze JWST MIRI/MRS IFU observations of three Seyferts and showcase the intriguing polycyclic aromatic hydrocarbon (PAH) emission characteristics in regions of $\sim 500\,\rm pc$ scales over or around their active galactic nuclei (AGN). Combinin
Externí odkaz:
http://arxiv.org/abs/2409.09772
Autor:
Zhang, Lulu, Packham, Chris, Hicks, Erin K. S., Davies, Ric I., Shimizu, Taro T., Alonso-Herrero, Almudena, Muñoz, Laura Hermosa, García-Bernete, Ismael, Pereira-Santaella, Miguel, Audibert, Anelise, López-Rodríguez, Enrique, Bellocch, Enrica, Bunker, Andrew J., Combes, Francoise, Díaz-Santos, Tanio, Gandhi, Poshak, García-Burillo, Santiago, García-Lorenzo, Begoña, González-Martín, Omaira, Imanishi, Masatoshi, Labiano, Alvaro, Leist, Mason T., Levenson, Nancy A., Almeida, Cristina Ramos, Ricci, Claudio, Rigopoulou, Dimitra, Rosario, David J., Stalevski, Marko, Ward, Martin J., Esparza-Arredondo, Donaji, Delaney, Dan, Fuller, Lindsay, Haidar, Houda, Hönig, Sebastian, Izumi, Takuma, Rouan, Daniel
Utilizing JWST MIRI/MRS IFU observations of the kiloparsec scale central regions, we showcase the diversity of ionized gas distributions and kinematics in six nearby Seyfert galaxies included in the GATOS survey. Specifically, we present spatially re
Externí odkaz:
http://arxiv.org/abs/2409.09771
Autor:
Zachary W. Johnson, Ric A. Romero
Publikováno v:
IEEE Access, Vol 9, Pp 50652-50666 (2021)
Adaptive beamsteering cognitive radar (AB-CRr) systems seek to improve detection and tracking performance by formulating a beam placement strategy adapted to their environment. AB-CRr builds a probabilistic model of the target environment that enable
Externí odkaz:
https://doaj.org/article/d5f73fa0dacc4529970380362ab8916e
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 2, Pp 1123-1143 (2021)
In this article, several extensions to an alternating space-time (ST) code (STC) physical layer security (PLS) scheme from the literature are proposed. These contributions include alternative orthogonal STCs as well as non-orthogonal and spatially-mu
Externí odkaz:
https://doaj.org/article/dff9bee7aed743618fe84a73be3fcce7
Autor:
de Xivry, Gilles Orban, Absil, Olivier, De Rosa, Robert J., Bonse, Markus J., Dannert, Felix, Hayoz, Jean, Grani, Paolo, Puglisi, Alfio, Baruffolo, Andrea, Salasnich, Bernardo, Davies, Ric, Glauser, Adrian M., Huby, Elsa, Kenworthy, Matthew, Quanz, Sascha P., Taylor, William, Zins, Gérard
Publikováno v:
Proceedings of the SPIE, Volume 13097, id. 13097-42 (2024)
The Enhanced Resolution Imager and Spectrograph (ERIS) is the new near-infrared instrument at the VLT-UT4. ERIS replaces and extends the observational capabilities formerly provided by SINFONI and NACO: integral field spectroscopy at 1 - 2.5 $\mu$m,
Externí odkaz:
http://arxiv.org/abs/2407.14406
Autor:
Rigopoulou, Dimitra, Donnan, Fergus R., García-Bernete, Ismael, Pereira-Santaella, Miguel, Alonso-Herrero, Almudena, Davies, Ric, Hunt, Leslie K., Roche, Patrick F., Shimizu, Taro
We present a systematic study of mid-infrared spectra of galaxies including star-forming galaxies and Active Galactic Nuclei observed with JWST MIRI-MRS and NIRSpec-IFU. We focus on the relative variations of the 3.3, 6.2, 7.7, 11.3, 12.7 and 17 micr
Externí odkaz:
http://arxiv.org/abs/2406.11415
Publikováno v:
IEEE Open Journal of the Communications Society, Vol 1, Pp 1503-1523 (2020)
Algorithms are provided to build a large set of unique complex-valued orthogonal space-time block codes (STBCs) from a known or standard STBC. A physical layer security (PLS) scheme is proposed to take advantage of this set by alternating the STBC in
Externí odkaz:
https://doaj.org/article/6f364625724b44a187813f205524b5b3
Autor:
Q. Jeanette O. Tan, Ric A. Romero
Publikováno v:
IEEE Access, Vol 7, Pp 181899-181915 (2019)
The authors present transmit-adaptive jammer nulling waveforms in cognitive radar (CRr) for aircraft response recognition as a form of electronic support in the electronic warfare domain. New forms of knowledge-based noise jammers that function as a
Externí odkaz:
https://doaj.org/article/bd81b160ff34497fa0b511e121fe7df5