Author
Stuart Sim
results may include different authors with the same name
9 papers
Type Ia supernovae (SNIa) are thermonuclear explosions of white dwarfs in binary systems. They are central to galactic chemical evolution and serve as standardizable candles in cosmology, yet their progenitors remain uncertain. In this…
Solar and Stellar Astrophysics · Physics
2025-11-05
Umberto Battino , James Keegans , Megan Allen , Friedrich Röpke Röpke , Falk Herwig , Andreas Best , Raphael Hirschi , Luciano Piersanti , Oscar Straniero , Stuart Sim , Claudia Travaglio , Pavel Denissenkov
The spectra of singly ionised Strontium and Yttrium (Sr {\sc ii} and Y {\sc ii}) have been proposed as identifications of certain spectral features in the AT2017gfo spectrum. With the growing demand for NLTE simulations of Kilonovae, there…
High Energy Astrophysical Phenomena · Physics
2024-07-02
Leo Mulholland , Niall McElroy , Fiona McNeill , Stuart Sim , Connor Ballance , Catherine Ramsbottom
Spectroscopy is an important tool for providing insights into the structure of core-collapse supernova explosions. We use the Monte Carlo radiative transfer code ARTIS to compute synthetic spectra and light curves based on a two-dimensional…
Solar and Stellar Astrophysics · Physics
2023-05-30
Thomas Maunder , Bernhard Müller , Fionntan Callan , Stuart Sim , Alexander Heger
The mergers of neutron stars expel a heavy-element enriched fireball which can be observed as a kilonova. The kilonova's geometry is a key diagnostic of the merger and is dictated by the properties of ultra-dense matter and the energetics…
High Energy Astrophysical Phenomena · Physics
2023-02-15
Albert Sneppen , Darach Watson , Andreas Bauswein , Oliver Just , Rubina Kotak , Ehud Nakar , Dovi Poznanski , Stuart Sim
Detection of gamma-rays emitted by radioactive isotopes synthesized in stellar explosions can give important insights into the processes that power transients such as supernovae, as well as providing a detailed census of the abundance of…
High Energy Astrophysical Phenomena · Physics
2021-09-29
Fiona H. Panther , Ivo R. Seitenzahl , Ashley J. Ruiter , Thomas Siegert , Stuart Sim , Roland M. Crocker
Gamma-ray astronomy explores the most energetic photons in nature to address some of the most pressing puzzles in contemporary astrophysics. It encompasses a wide range of objects and phenomena: stars, supernovae, novae, neutron stars,…
High Energy Astrophysical Phenomena · Physics
2019-02-11
Chris L. Fryer , Frank Timmes , Aimee L. Hungerford , Aaron Couture , Fred Adams , Wako Aoki , Almudena Arcones , David Arnett , Katie Auchettl , Melina Avila , Carles Badenes , Eddie Baron , Andreas Bauswein , John Beacom , Jeff Blackmon , Stephane Blondin , Peter Bloser , Steve Boggs , Alan Boss , Terri Brandt , Eduardo Bravo , Ed Brown , Peter Brown , Steve Bruenn. Carl Budtz-Jorgensen , Eric Burns , Alan Calder , Regina Caputo , Art Champagne , Roger Chevalier , Alessandro Chieffi , Kelly Chipps , David Cinabro , Ondrea Clarkson , Don Clayton , Alain Coc , Devin Connolly , Charlie Conroy , Benoit Cote , Sean Couch , Nicolas Dauphas , Richard James deBoer , Catherine Deibel , Pavel Denisenkov , Steve Desch , Luc Dessart , Roland Diehl , Carolyn Doherty , Inma Dominguez , Subo Dong , Vikram Dwarkadas , Doreen Fan , Brian Fields , Carl Fields , Alex Filippenko , Robert Fisher , Francois Foucart , Claes Fransson , Carla Frohlich , George Fuller , Brad Gibson , Viktoriya Giryanskaya , Joachim Gorres , Stephane Goriely , Sergei Grebenev , Brian Grefenstette , Evan Grohs , James Guillochon , Alice Harpole , Chelsea Harris , J. Austin Harris , Fiona Harrison , Dieter Hartmann , Masa-aki Hashimoto , Alexander Heger , Margarita Hernanz , Falk Herwig , Raphael Hirschi , Raphael William Hix , Peter Hoflich , Robert Hoffman , Cole Holcomb , Eric Hsiao , Christian Iliadis , Agnieszka Janiuk , Thomas Janka , Anders Jerkstrand , Lucas Johns , Samuel Jones , Jordi Jose , Toshitaka Kajino , Amanda Karakas , Platon Karpov , Dan Kasen , Carolyn Kierans , Marc Kippen , Oleg Korobkin , Chiaki Kobayashi , Cecilia Kozma , Saha Krot , Pawan Kumar , Irfan Kuvvetli , Alison Laird , Martin Laming , Josefin Larsson , John Lattanzio , James Lattimer , Mark Leising , Annika Lennarz , Eric Lentz , Marco Limongi , Jonas Lippuner , Eli Livne , Nicole Lloyd-Ronning , Richard Longland , Laura A. Lopez , Maria Lugaro , Alexander Lutovinov , Kristin Madsen , Chris Malone , Francesca Matteucci , Julie McEnery , Zach Meisel , Bronson Messer , Brian Metzger , Bradley Meyer , Georges Meynet , Anthony Mezzacappa , Jonah Miller , Richard Miller , Peter Milne , Wendell Misch , Lee Mitchell , Philipp Mosta , Yuko Motizuki , Bernhard Muller , Matthew Mumpower , Jeremiah Murphy , Shigehiro Nagataki , Ehud Nakar , Ken'ichi Nomoto , Peter Nugent , Filomena Nunes , Brian O'Shea , Uwe Oberlack , Steven Pain , Lucas Parker , Albino Perego , Marco Pignatari , Gabriel Martinez Pinedo , Tomasz Plewa , Dovi Poznanski , William Priedhorsky , Boris Pritychenko , David Radice , Enrico Ramirez-Ruiz , Thomas Rauscher , Sanjay Reddy , Ernst Rehm , Rene Reifarth , Debra Richman , Paul Ricker , Nabin Rijal , Luke Roberts , Friedrich Ropke , Stephan Rosswog , Ashley J. Ruiter , Chris Ruiz , Daniel Wolf Savin , Hendrik Schatz , Dieter Schneider , Josiah Schwab , Ivo Seitenzahl , Ken Shen , Thomas Siegert , Stuart Sim , David Smith , Karl Smith , Michael Smith , Jesper Sollerman , Trevor Sprouse , Artemis Spyrou , Sumner Starrfield , Andrew Steiner , Andrew W. Strong , Tuguldur Sukhbold , Nick Suntzeff , Rebecca Surman , Toru Tanimori , Lih-Sin The , Friedrich-Karl Thielemann , Alexey Tolstov , Nozomu Tominaga , John Tomsick , Dean Townsley , Pelagia Tsintari , Sergey Tsygankov , David Vartanyan , Tonia Venters , Tom Vestrand , Jacco Vink , Roni Waldman , Lifang Wang , Xilu Wang , MacKenzie Warren , Christopher West , J. Craig Wheeler , Michael Wiescher , Christoph Winkler , Lisa Winter , Bill Wolf , Richard Woolf , Stan Woosley , Jin Wu , Chris Wrede , Shoichi Yamada , Patrick Young , Remco Zegers , Michael Zingale , Simon Portegies Zwart
Our Galaxy hosts the annihilation of a few $\times 10^{43}$ low-energy positrons every second. Radioactive isotopes capable of supplying such positrons are synthesised in stars, stellar remnants, and supernovae. For decades, however, there…
High Energy Astrophysical Phenomena · Physics
2017-05-25
Roland M. Crocker , Ashley J. Ruiter , Ivo R. Seitenzahl , Fiona H. Panther , Stuart Sim , Holger Baumgardt , Anais Moller , David M. Nataf , Lilia Ferrario , J. J. Eldridge , Martin White , Brad E. Tucker , Felix Aharonian
This White Paper, submitted to the recent ESA call for science themes to define its future large missions, advocates the need for a transformational leap in our understanding of two key questions in astrophysics: 1) How does ordinary matter…
High Energy Astrophysical Phenomena · Physics
2013-12-04
Kirpal Nandra , Didier Barret , Xavier Barcons , Andy Fabian , Jan-Willem den Herder , Luigi Piro , Mike Watson , Christophe Adami , James Aird , Jose Manuel Afonso , Dave Alexander , Costanza Argiroffi , Lorenzo Amati , Monique Arnaud , Jean-Luc Atteia , Marc Audard , Carles Badenes , Jean Ballet , Lucia Ballo , Aya Bamba , Anil Bhardwaj , Elia Stefano Battistelli , Werner Becker , Michaël De Becker , Ehud Behar , Stefano Bianchi , Veronica Biffi , Laura Bîrzan , Fabrizio Bocchino , Slavko Bogdanov , Laurence Boirin , Thomas Boller , Stefano Borgani , Katharina Borm , Nicolas Bouché , Hervé Bourdin , Richard Bower , Valentina Braito , Enzo Branchini , Graziella Branduardi-Raymont , Joel Bregman , Laura Brenneman , Murray Brightman , Marcus Brüggen , Johannes Buchner , Esra Bulbul , Marcella Brusa , Michal Bursa , Alessandro Caccianiga , Ed Cackett , Sergio Campana , Nico Cappelluti , Massimo Cappi , Francisco Carrera , Maite Ceballos , Finn Christensen , You-Hua Chu , Eugene Churazov , Nicolas Clerc , Stephane Corbel , Amalia Corral , Andrea Comastri , Elisa Costantini , Judith Croston , Mauro Dadina , Antonino D'Ai , Anne Decourchelle , Roberto Della Ceca , Konrad Dennerl , Klaus Dolag , Chris Done , Michal Dovciak , Jeremy Drake , Dominique Eckert , Alastair Edge , Stefano Ettori , Yuichiro Ezoe , Eric Feigelson , Rob Fender , Chiara Feruglio , Alexis Finoguenov , Fabrizio Fiore , Massimiliano Galeazzi , Sarah Gallagher , Poshak Gandhi , Massimo Gaspari , Fabio Gastaldello , Antonis Georgakakis , Ioannis Georgantopoulos , Marat Gilfanov , Myriam Gitti , Randy Gladstone , Rene Goosmann , Eric Gosset , Nicolas Grosso , Manuel Guedel , Martin Guerrero , Frank Haberl , Martin Hardcastle , Sebastian Heinz , Almudena Alonso Herrero , Anthony Hervé , Mats Holmstrom , Kazushi Iwasawa , Peter Jonker , Jelle Kaastra , Erin Kara , Vladimir Karas , Joel Kastner , Andrew King , Daria Kosenko , Dimita Koutroumpa , Ralph Kraft , Ingo Kreykenbohm , Rosine Lallement , Giorgio Lanzuisi , J. Lee , Marianne Lemoine-Goumard , Andrew Lobban , Giuseppe Lodato , Lorenzo Lovisari , Simone Lotti , Ian McCharthy , Brian McNamara , Antonio Maggio , Roberto Maiolino , Barbara De Marco , Domitilla de Martino , Silvia Mateos , Giorgio Matt , Ben Maughan , Pasquale Mazzotta , Mariano Mendez , Andrea Merloni , Giuseppina Micela , Marco Miceli , Robert Mignani , Jon Miller , Giovanni Miniutti , Silvano Molendi , Rodolfo Montez , Alberto Moretti , Christian Motch , Yaël Nazé , Jukka Nevalainen , Fabrizio Nicastro , Paul Nulsen , Takaya Ohashi , Paul O'Brien , Julian Osborne , Lida Oskinova , Florian Pacaud , Frederik Paerels , Mat Page , Iossif Papadakis , Giovanni Pareschi , Robert Petre , Pierre-Olivier Petrucci , Enrico Piconcelli , Ignazio Pillitteri , C. Pinto , Jelle de Plaa , Etienne Pointecouteau , Trevor Ponman , Gabriele Ponti , Delphine Porquet , Ken Pounds , Gabriel Pratt , Peter Predehl , Daniel Proga , Dimitrios Psaltis , David Rafferty , Miriam Ramos-Ceja , Piero Ranalli , Elena Rasia , Arne Rau , Gregor Rauw , Nanda Rea , Andy Read , James Reeves , Thomas Reiprich , Matthieu Renaud , Chris Reynolds , Guido Risaliti , Jerome Rodriguez , Paola Rodriguez Hidalgo , Mauro Roncarelli , David Rosario , Mariachiara Rossetti , Agata Rozanska , Emmanouil Rovilos , Ruben Salvaterra , Mara Salvato , Tiziana Di Salvo , Jeremy Sanders , Jorge Sanz-Forcada , Kevin Schawinski , Joop Schaye , Axel Schwope , Salvatore Sciortino , Paola Severgnini , Francesco Shankar , Debora Sijacki , Stuart Sim , Christian Schmid , Randall Smith , Andrew Steiner , Beate Stelzer , Gordon Stewart , Tod Strohmayer , Lothar Strüder , Ming Sun , Yoh Takei , V. Tatischeff , Andreas Tiengo , Francesco Tombesi , Ginevra Trinchieri , T. G. Tsuru , Asif Ud-Doula , Eugenio Ursino , Lynne Valencic , Eros Vanzella , Simon Vaughan , Cristian Vignali , Jacco Vink , Fabio Vito , Marta Volonteri , Daniel Wang , Natalie Webb , Richard Willingale , Joern Wilms , Michael Wise , Diana Worrall , Andrew Young , Luca Zampieri , Jean In't Zand , Silvia Zane , Andreas Zezas , Yuying Zhang , Irina Zhuravleva
We present an analysis of hard X-ray features in the spectrum of the bright Sy 1 galaxy Mrk 335 observed by the XMM-Newton satellite. Our analysis confi rms the presence of a broad, ionised iron Kalpha emission line in the spectrum, first…