Browsing by Author "Diehl, Roland"

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    • 26Al gamma rays from the Galaxy with INTEGRAL/SPI 

      Pleintinger, Moritz M. M.; Diehl, Roland; Siegert, Thomas; Greiner, Jochen; Krause, Martin G. H. (2023-03-30)
      Context. The presence of radioactive 26Al at 1.8 MeV reveals an ongoing process of nucleosynthesis in the Milky Way. Diffuse emission from its decay can be measured with gamma-ray telescopes in space. The intensity, line ...

    • Catching Element Formation In The Act 

      Fryer, Chris L.; Timmes, Frank; Hungerford, Aimee L.; Couture, Aaron; Adams, Fred; Aoki, Wako; Arcones, Almudena; Arnett, David; Auchettl, Katie; Avila, Melina; Badenes, Carles; Baron, Eddie; Bauswein, Andreas; Beacom, John; Blackmon, Jeff; Blondin, Stephane; Bloser, Peter; Boggs, Steve; Boss, Alan; Brandt, Terri; Bravo, Eduardo; Brown, Ed; Brown, Peter; Budtz-Jorgensen, Steve Bruenn Carl; Burns, Eric; Calder, Alan; Caputo, Regina; Champagne, Art; Chevalier, Roger; Chieffi, Alessandro; Chipps, Kelly; Cinabro, David; Clarkson, Ondrea; Clayton, Don; Coc, Alain; Connolly, Devin; Conroy, Charlie; Cote, Benoit; Couch, Sean; Dauphas, Nicolas; deBoer, Richard James; Deibel, Catherine; Denisenkov, Pavel; Desch, Steve; Dessart, Luc; Diehl, Roland; Doherty, Carolyn; Dominguez, Inma; Dong, Subo; Dwarkadas, Vikram; Fan, Doreen; Fields, Brian; Fields, Carl; Filippenko, Alex; Fisher, Robert; Foucart, Francois; Fransson, Claes; Frohlich, Carla; Fuller, George; Gibson, Brad; Giryanskaya, Viktoriya; Gorres, Joachim; Goriely, Stephane; Grebenev, Sergei; Grefenstette, Brian; Grohs, Evan; Guillochon, James; Harpole, Alice; Harris, Chelsea; Harris, J. Austin; Harrison, Fiona; Hartmann, Dieter; Hashimoto, Masa-aki; Heger, Alexander; Hernanz, Margarita; Herwig, Falk; Hirschi, Raphael; Hix, Raphael William; Hoflich, Peter; Hoffman, Robert; Holcomb, Cole; Hsiao, Eric; Iliadis, Christian; Janiuk, Agnieszka; Janka, Thomas; Jerkstrand, Anders; Johns, Lucas; Jones, Samuel; Jose, Jordi; Kajino, Toshitaka; Karakas, Amanda; Karpov, Platon; Kasen, Dan; Kierans, Carolyn; Kippen, Marc; Korobkin, Oleg; Kobayashi, Chiaki; Kozma, Cecilia; Krot, Saha; Kumar, Pawan; Kuvvetli, Irfan; Laird, Alison; Laming, Martin; Larsson, Josefin; Lattanzio, John; Lattimer, James; Leising, Mark; Lennarz, Annika; Lentz, Eric; Limongi, Marco; Lippuner, Jonas; Livne, Eli; Lloyd-Ronning, Nicole; Longland, Richard; Lopez, Laura A.; Lugaro, Maria; Lutovinov, Alexander; Madsen, Kristin; Malone, Chris; Matteucci, Francesca; McEnery, Julie; Meisel, Zach; Messer, Bronson; Metzger, Brian; Meyer, Bradley; Meynet, Georges; Mezzacappa, Anthony; Miller, Jonah; Miller, Richard; Milne, Peter; Misch, Wendell; Mitchell, Lee; Mosta, Philipp; Motizuki, Yuko; Muller, Bernhard; Mumpower, Matthew; Murphy, Jeremiah; Nagataki, Shigehiro; Nakar, Ehud; Nomoto, Ken'ichi; Nugent, Peter; Nunes, Filomena; O'Shea, Brian; Oberlack, Uwe; Pain, Steven; Parker, Lucas; Perego, Albino; Pignatari, Marco; Pinedo, Gabriel Martinez; Plewa, Tomasz; Poznanski, Dovi; Priedhorsky, William; Pritychenko, Boris; Radice, David; Ramirez-Ruiz, Enrico; Rauscher, Thomas; Reddy, Sanjay; Rehm, Ernst; Reifarth, Rene; Richman, Debra; Ricker, Paul; Rijal, Nabin; Roberts, Luke; Ropke, Friedrich; Rosswog, Stephan; Ruiter, Ashley J.; Ruiz, Chris; Savin, Daniel Wolf; Schatz, Hendrik; Schneider, Dieter; Schwab, Josiah; Seitenzahl, Ivo; Shen, Ken; Siegert, Thomas; Sim, Stuart; Smith, David; Smith, Karl; Smith, Michael; Sollerman, Jesper; Sprouse, Trevor; Spyrou, Artemis; Starrfield, Sumner; Steiner, Andrew; Strong, Andrew W.; Sukhbold, Tuguldur; Suntzeff, Nick; Surman, Rebecca; Tanimori, Toru; The, Lih-Sin; Thielemann, Friedrich-Karl; Tolstov, Alexey; Tominaga, Nozomu; Tomsick, John; Townsley, Dean; Tsintari, Pelagia; Tsygankov, Sergey; Vartanyan, David; Venters, Tonia; Vestrand, Tom; Vink, Jacco; Waldman, Roni; Wang, Lifang; Wang, Xilu; Warren, MacKenzie; West, Christopher; Wheeler, J. Craig; Wiescher, Michael; Winkler, Christoph; Winter, Lisa; Wolf, Bill; Woolf, Richard; Woosley, Stan; Wu, Jin; Wrede, Chris; Yamada, Shoichi; Young, Patrick; Zegers, Remco; Zingale, Michael; Zwart, Simon Portegies (2019-03-31)
      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, ...

    • Comparing simulated $^{26}$Al maps to gamma-ray measurements 

      Pleintinger, Moritz M. M.; Siegert, Thomas; Diehl, Roland; Fujimoto, Yusuke; Greiner, Jochen; Krause, Martin G. H.; Krumholz, Mark R. (2019-12-03)
      Context. The diffuse gamma-ray emission of $^{26}{\rm Al}$ at 1.8 MeV reflects ongoing nucleosynthesis in the Milky Way, and traces massive-star feedback in the interstellar medium due to its 1 Myr radioactive lifetime. ...

    • Constraints on positron annihilation kinematics in the inner Galaxy 

      Siegert, Thomas; Crocker, Roland M.; Diehl, Roland; Krause, Martin G. H.; Panther, Fiona H.; Pleintinger, Moritz M. M.; Weinberger, Christoph (2019-07-01)
      Context. The annihilation of cosmic positrons with electrons in the interstellar medium results in the strongest persistent γ-ray line signal in the sky. For the past 50 yr, this 511 keV emission - predominantly from the ...

    • Galactic 26Al traces metal loss through hot chimneys 

      Krause, Martin G. H.; Rodgers-Lee, Donna; Dale, James E.; Diehl, Roland; Kobayashi, Chiaki (2021-02-01)
      Radioactive 26Al is an excellent tracer for metal ejection in the Milky Way, and can provide a direct constraint on the modelling of supernova feedback in galaxy evolution. Gamma-ray observations of the 26Al decay line ...

    • Galactic Population Synthesis of Radioactive Nucleosynthesis Ejecta 

      Siegert, Thomas; Pleintinger, Moritz M. M.; Diehl, Roland; Krause, Martin G. H.; Greiner, Jochen; Weinberger, Christoph (2023-03-30)
      Diffuse gamma-ray line emission traces freshly produced radioisotopes in the interstellar gas, providing a unique perspective on the entire Galactic cycle of matter from nucleosynthesis in massive stars to their ejection ...

    • Gamma-ray spectroscopy of galactic nucleosynthesis 

      Diehl, Roland; Greiner, Jochen; Krause, Martin; Pleintinger, Moritz; Siegert, Thomas (2023-03-22)
      Diffuse gamma-ray emission from the decay of radioactive $^{26}$Al is a messenger from the nucleosynthesis activity in our current-day galaxy. Because this material is attributed to ejections from massive stars and their ...

    • An INTEGRAL/SPI view of reticulum II: Particle dark matter and primordial black holes limits in the MeV range 

      Siegert, Thomas; Boehm, Celine; Calore, Francesca; Diehl, Roland; Krause, Martin G. H.; Serpico, Pasquale D.; Vincent, Aaron C. (2022-03-01)
      Reticulum II (Ret II) is a satellite galaxy of the Milky Way and presents a prime target to investigate the nature of dark matter (DM) because of its high mass-to-light ratio. We evaluate a dedicated INTEGRAL observation ...

    • The Radioactive Nuclei 26Al and 60Fe in the Cosmos and in the Solar System 

      Diehl, Roland; Lugaro, Maria; Heger, Alexander; Sieverding, Andre; Tang, Xiaodong; Li, KuoAng; Li, Ertao; Doherty, Carolyn L.; Krause, Martin G. H.; Wallner, Anton; Prantzos, Nikos; Brinkman, Hannah E.; Hartogh, Jaqueline W. den; Wehmeyer, Benjamin; López, Andre Yagüe; Pleintinger, Moritz M. M.; Banerjee, Projival; Wang, Wei (2021-12-09)
      The cosmic evolution of the chemical elements from the Big Bang to the present time is driven by nuclear fusion reactions inside stars and stellar explosions. A cycle of matter recurrently re-processes metal-enriched stellar ...

    • Steady-state nucleosynthesis throughout the Galaxy 

      Diehl, Roland; Krause, Martin G. H.; Kretschmer, Karsten; Lang, Michael; Pleintinger, Moritz M. M.; Siegert, Thomas; Wang, Wei; Bouchet, Laurent; Martin, Pierrick (2021-06-01)
      The measurement and astrophysical interpretation of characteristic γ-ray lines from nucleosynthesis was one of the prominent science goals of the INTEGRAL mission and in particular its spectrometer SPI. Emission from 26Al ...

    • Surround & Squash : The Interstellar Medium around Scorpius Centaurus OB2 

      Krause, Martin G. H.; Burkert, Andreas; Diehl, Roland; Fierlinger, Katharina; Gaczkowski, Benjamin; Kroell, Daniel; Ngoumou, Judith; Roccatagliata, Veronica; Siegert, Thomas; Preibisch, Thomas (2018-11-13)
      Context. Feedback by massive stars shapes the interstellar medium and is thought to influence subsequent star formation. The details of this process are under debate. Aims. We exploited observational constraints on stars, ...