Examinando por Autor "Miller, Jon"

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Acceso Abierto
On Synthetic Absorption Line Profiles of Thermally Driven Winds from Active Galactic Nuclei
(IOP Science Publishing, 2021-06-22) Ganguly, S.; Proga, D.; Waters, T.; Dannen, R. C.; Dyda, S.; Giustini, M.; Kallman, T.; Raymond, J.; Miller, Jon; Rodríguez Hidalgo, P.; National Aeronautics and Space Administration (NASA); Comunidad de Madrid; Ganguly, S. [0000-0002-8256-5982]; Proga, D. [0000-0002-6336-5125]; Waters, T. [0000-0002-5205-9472]; Dannen, R. C. [0000-0002-5160-8716]; Dyda, S. [0000-0002-1954-8864]; Giustini, M. [0000-0002-1329-658X]; Kallman, T. [0000-0002-5779-6906]; Raymond, J. [0000-0002-7868-1622]; Miller, J. [0000-0001-6432-7860]; Rodríguez Hidalgo, P. [0000-0003-0677-785X]
The warm absorbers observed in more than half of all nearby active galactic nuclei are tracers of ionized outflows located at parsec-scale distances from the central engine. If the smallest inferred ionization parameters correspond to plasma at a few 104 K, then the gas undergoes a transition from being bound to unbound, provided it is further heated to ∼106 K at larger radii. Dannen et al. recently discovered that, under these circumstances, thermally driven wind solutions are unsteady and even show very dense clumps due to thermal instability. To explore the observational consequences of these new wind solutions, we compute line profiles based on the one-dimensional simulations of Dannen et al. We show how the line profiles from even a simple steady-state wind solution depend on the ionization energy (IE) of absorbing ions, which is a reflection of the wind ionization stratification. To organize the diversity of the line shapes, we group them into four categories: weak Gaussians, saturated boxy profiles with and without an extended blue wing, and broad weak profiles. The lines with profiles in the last two categories are produced by ions with the highest IE that probe the fastest regions. Their maximum blueshifts agree with the highest flow velocities in thermally unstable models, both steady-state and clumpy versions. In contrast, the maximum blueshifts of the highest-IE lines in thermally stable models can be less than half of the actual solution velocities. Clumpy solutions can additionally imprint distinguishable absorption troughs at widely separated velocities.
Acceso Abierto
The athena x-ray integral field unit: a consolidated design for the system requirement review of the preliminary definition phase
(Springer Link, 2022-08-30) Barret, Didier; Albouys, Vincent; Den Herder, Jan-Willem; Piro, Luigi; Cappi, Massimo; Huovelin, Juhani; Kelley, Richard; Mas-Hesse, J. Miguel; Paltani, Stéphane; Rauw, Gregor; Rozanska, Agata; Acero, Fabio; Vera Trallero, Isabel; Grosso, Nicolas; Varnière, Peggy; Genolet, Ludovic; Charles, Ivan; Miniutti, Giovanni; Ullom, Joel; Sato, Kosuke; Bulgarelli, Andrea; Laurent, Philippe; Adami, Christophe; Rigano, Manuela; Langer, Mathieu; Granat, Dolorès; Pinsard, Frederic; Schaye, Joop; Walmsley, Gavin; Woźniak, Grzegorz; Aicardi, Corinne; Perry, James; Dupourqué, Simon; Ledot, Aurélien; Fioretti, Valentina; Surace, Christian; Nicastro, Fabrizio; Sciortino, Salvatore; Jiménez, María; Jolly, Antoine; Bounab, Ayoub; Maussang, Irwin; Smith, Stephen; Clerc, Laurent; Lo Cicero, Ugo; Kiviranta, Mikko; Cavazzuti, Elisabetta; Roelfsema, Peter; Roig, Anton; Medinaceli Villegas, Eduardo; Lesrel, Jean; Boyce, Kevin; Dupieux, Michel; Durkin, Malcom; Argan, Andrea; Pascale, Ramon; Eckert, Dominique; Soucek, Jan; Kammoun, Elias; Bonny, Patrick; Yamaguchi, Hiroya; Auricchio, Natalia; Beaumont, Sophie; Ettori, Stefano; Cucchetti, Edoardo; Pointecouteau, Etienne; Akamatsu, Hiroki; Vidriales, María; Lotti, Simone; Calarco, Simona; Zuchniak, Monika; Merino Alonso, Pablo Eleazar; Kreykenbohm, Ingo; Wakeham, Nicholas; Soto Aguilar, Javier; Vink, Jacco; De Wit, Martin; Silva, Vitor; Kaastra, Jelle; Den Hartog, Roland; Taralli, Emanuele; Clerc, Nicolas; Coleiro, Alexis; Van Leeuwen, Bert-Joost; Guignard, Nicolas; Torrioli, Guido; Ubertini, Pietro; Bernard, Vivian; Miller, Jon; Eiriz, Valvanera; Boreux, Charles; Poyatos Martinez, David; Pratt, Gabriel W.; Molin, Alexeï; Minervini, Gabriele; Le Mer, Isabelle; De Vries, Cor; Yamasaki, Noriko; Goldwurm, Andrea; Coynel, Alexandre; Van Loon, Dennis; Dadina, Mauro; Prouvé, Thomas; Brachet, Frank; Porter, Frederick; Spizzi, Pierre; Jourdan, Thierry; Massonet, Didier; Lyautey, Bertrand; Sciortino, Luisa; Pinto, Ciro; Vibert, Laurent; Simionescu, Aurora; Boutelier, Martin; Roncarelli, Mauro; Julien, Sabine; González, Raoul; Maffei, Bruno; Todaro, Michela; Balado, A.; Ferrando, Philippe; Atienza, R.; Schwander, Denis; Millerioux, Jean-Pierre; Godet, Olivier; Sanisidro, Julien; Bancel, Florian; Vaccaro, Davide; Webb, Natalie; Camus, Thierry; Coriat, Mickael; Carron, Jérôme; Piconcelli, Enrico; Puccetti, Simonetta; Mitsuda, Kazuhisa; Mineo, Teresa; Jaubert, Jean; D'Ai, Antonino; Adam, Thomas; Frericks, Martin; Costantini, Elisa; Janiuk, Agnieszka; Cobo, Beatriz; Ghizzardi, Simona; Gatti, Flavio; Molendi, Silvano; Wise, Michael; Bandler, Simon; Torrejón, José Miguel; Kedziora, Bartosz; Dauser, Thomas; Prêle, Damien; Duband, Lionel; Terrier, Régis; Pajot, François; Daniel, Christophe; Ferrari Barusso, Lorenzo; Mot, Baptiste; Vodopivec, Boris Martin; Giovannini, Elisa; DeNigris, Natalie; Encinas Plaza, José Miguel; Van der Kuur, Jan; González, Manuel; Amato, Roberta; Geoffray, Hervé; Dercksen, Johannes; Pradines, Alice; Rollet, Bertrand; Dubbeldam, Luc; Terrasa, Guilhem; Alcacera Gil, María Ángeles; Maisonnave, Océane; DiPirro, Michael; Monestes, David; Laurenza, Monica; Boorman, Peter; Bozzo, Enrico; Capobianco, Vito; Parot, Yann; D'Andrea, Matteo; Korb, Andrew; Nagayoshi, Kenichiro; Roudil, Gilles; Doumayrou, Eric; Gao, Jian-Rong; Luminari, Alfredo; Khosropanah, Pourya; Gloaguen, Emilie; Branduardi Raymont, Graziella; Peille, Philippe; Gabici, Stefano; Eckart, Megan; Franssen, Philippe; Shinozaki, Keisuke; Gonzalo Melchor, Alejandro; Ptak, Andy; Chervenak, James; Michalski, Lea; Castellani, Florent; Cuttaia, Francesco; Thibert, Tanguy; Hieltjes, Paul; Hurtado, Adolfo Jesus; Fossecave, Hervé; Irwin, Kent; Adams, Joseph; Attard, Anthony; Etcheverry, Christophe; Rioland, Guillaume; Natalucci, Lorenzo; Finoguenov, Alexis; Jacquey, Christian; Barbera, Marco; Barcons, Xavier; Varisco , Salvatore; Mendez, Mariano; Ercolani, Eric; Fernández Sánchez, Miguel; Gastaldello, Fabio; Uslenghi, Michela; Angelinelli, Matteo; Jacques, Lionel; Villa, Fabrizio; Lorenz, Maximilian; Mesnager, Jean-Michel; Durand, Jean Louis; Sakai, Kazuhiro; Decourchelle, Anne; Martin, Sylvain; Berrocal, A.; Finkbeiner, Fred; Wilms, Joern; Reina, M.; Rudnicki, Tomasz; Doriese, William; Nazé, Yaël; Abdoelkariem, Shariefa; D'anca, Fabio; Gant, Florent; Van der Hulst, Paul; Mazzotta, Pasquale; Coeur-Joly, Odile; Añón Cancela, M.; Canourgues, Florent; Fiore, Fabrizio; Raulin, Desi; Noguès, Loïc; Hoogeveen, Ruud; Ravera, Laurent; Callanan, Paul; Cheatom, Oscar; André, Jérôme; Sordet, Michael; Brienza, Daniele; Duval, Jean-Marc; Corcione, Leonardo; Fiocchi, Maria Teresa; Pailot, Damien; Panessa, Francesca; Fioretti, Valentina; Van Weers, Henk; Anvar, Shebli; Parodi, Luigi; Petit, Pascal; De Plaa, Jelle; Kirsch, Christian; Macculi, Claudio; Volpe, Angela; Puccio, Elena; Gómez Elvira, J.; Bonnet, François; Marelli, Lorenzo; Murat, David; Audard, Marc; Jackson, Brian; Colonges, Stéphane; Korpela, Seppo; Webb, Natalie; Laudet, Philippe; Chiarello, Fabio; Ligori, Sebastiano; Montinaro, Nicola; Svoboda, Jiri; Bij de Vaate, Jan Geralt; Blin, Sylvie; Jonker, Peter; Bruijn, Marcel; Ceballos, Maria Teresa; Cardiel, Nicolás; Kilbourne, Caroline; Chaoul, Laurence; Gottardi, Luciano; Gros, Michel; Bonino, Donata; Skup, Konrad; Rodriguez, Louis; Fiorini, Mauro; Ardellier, Florence; Bellouard, Elise; Agencia Estatal de Investigación (AEI); Ministerio de Ciencia e Innovación (MICINN); Centre National D'Etudes Spatiales (CNES); Agenzia Spaziale Italiana (ASI); European Space Agency (ESA)
The Athena X-ray Integral Unit (X-IFU) is the high resolution X-ray spectrometer, studied since 2015 for flying in the mid-30s on the Athena space X-ray Observatory, a versatile observatory designed to address the Hot and Energetic Universe science theme, selected in November 2013 by the Survey Science Committee. Based on a large format array of Transition Edge Sensors (TES), it aims to provide spatially resolved X-ray spectroscopy, with a spectral resolution of 2.5 eV (up to 7 keV) over an hexagonal field of view of 5 arc minutes (equivalent diameter). The X-IFU entered its System Requirement Review (SRR) in June 2022, at about the same time when ESA called for an overall X-IFU redesign (including the X-IFU cryostat and the cooling chain), due to an unanticipated cost overrun of Athena. In this paper, after illustrating the breakthrough capabilities of the X-IFU, we describe the instrument as presented at its SRR, browsing through all the subsystems and associated requirements. We then show the instrument budgets, with a particular emphasis on the anticipated budgets of some of its key performance parameters. Finally we briefly discuss on the ongoing key technology demonstration activities, the calibration and the activities foreseen in the X-IFU Instrument Science Center, and touch on communication and outreach activities, the consortium organisation, and finally on the life cycle assessment of X-IFU aiming at minimising the environmental footprint, associated with the development of the instrument. Thanks to the studies conducted so far on X-IFU, it is expected that along the design-to-cost exercise requested by ESA, the X-IFU will maintain flagship capabilities in spatially resolved high resolution X-ray spectroscopy, enabling most of the original X-IFU related scientific objectives of the Athena mission to be retained.