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  1. AU="Jormanainen, J"
  2. AU="Pichardo-González, Priamo A"
  3. AU="Cannegieter, Suzanne"
  4. AU="Trocino, Giuseppe"
  5. AU="Emiliano, Thais Moura"
  6. AU=Sinelli Mariateresa
  7. AU="De-guo LÜ"
  8. AU="Benoit-Pilven, Clara"
  9. AU="Lanza, Stefania"
  10. AU="Chilingarian, A"
  11. AU="Baldovini, Nicolas"
  12. AU="López Rodríguez, David"
  13. AU="Alexander König"
  14. AU="Jakobsen, Henrik L"
  15. AU="Yong-Zhao Dai"
  16. AU="Tara L. Pukala"
  17. AU="Addo‐Danso, Shalom D."
  18. AU=Ficheux Q.
  19. AU="Tomoyo Sawada"
  20. AU="Mohammad Kawsar Sharif Siam"
  21. AU=Kushnareva Yulia
  22. AU="Canova, Christopher T"
  23. AU="Hasnaoui, Naoual"
  24. AU="Maradana, Jhansi"
  25. AU="Raggini, Elisa"
  26. AU="Baxter, A."
  27. AU="Jackson, Shirnae"
  28. AU="Schenzle, Lisa"
  29. AU="Veronica Phillips"
  30. AU="Braun, Jörg"
  31. AU="Cassandra E. Holbert"
  32. AU="Trevisan Alexandra"

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  1. Artikel ; Online: Optical polarization from colliding stellar stream shocks in a tidal disruption event.

    Liodakis, I / Koljonen, K I I / Blinov, D / Lindfors, E / Alexander, K D / Hovatta, T / Berton, M / Hajela, A / Jormanainen, J / Kouroumpatzakis, K / Mandarakas, N / Nilsson, K

    Science (New York, N.Y.)

    2023  Band 380, Heft 6645, Seite(n) 656–658

    Abstract: A tidal disruption event (TDE) occurs when a supermassive black hole rips apart a passing star. Part of the stellar material falls toward the black hole, forming an accretion disk that in some cases launches a relativistic jet. We performed optical ... ...

    Abstract A tidal disruption event (TDE) occurs when a supermassive black hole rips apart a passing star. Part of the stellar material falls toward the black hole, forming an accretion disk that in some cases launches a relativistic jet. We performed optical polarimetry observations of a TDE, AT 2020mot. We find a peak linear polarization degree of 25 ± 4%, consistent with highly polarized synchrotron radiation, as is typically observed from relativistic jets. However, our radio observations, taken up to 8 months after the optical peak, do not detect the corresponding radio emission expected from a relativistic jet. We suggest that the linearly polarized optical emission instead arises from shocks that occur during accretion disk formation, as the stream of stellar material collides with itself.
    Sprache Englisch
    Erscheinungsdatum 2023-05-11
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abj9570
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Search for Gamma-Ray Spectral Lines from Dark Matter Annihilation up to 100 TeV toward the Galactic Center with MAGIC.

    Abe, H / Abe, S / Acciari, V A / Aniello, T / Ansoldi, S / Antonelli, L A / Arbet Engels, A / Arcaro, C / Artero, M / Asano, K / Baack, D / Babić, A / Baquero, A / Barres de Almeida, U / Barrio, J A / Batković, I / Baxter, J / Becerra González, J / Bednarek, W /
    Bernardini, E / Bernardos, M / Berti, A / Besenrieder, J / Bhattacharyya, W / Bigongiari, C / Biland, A / Blanch, O / Bonnoli, G / Bošnjak, Ž / Burelli, I / Busetto, G / Carosi, R / Carretero-Castrillo, M / Ceribella, G / Chai, Y / Chilingarian, A / Cikota, S / Colombo, E / Contreras, J L / Cortina, J / Covino, S / D'Amico, G / D'Elia, V / Da Vela, P / Dazzi, F / De Angelis, A / De Lotto, B / Del Popolo, A / Delfino, M / Delgado, J / Delgado Mendez, C / Depaoli, D / Di Pierro, F / Di Venere, L / Do Souto Espiñeira, E / Dominis Prester, D / Donini, A / Dorner, D / Doro, M / Elsaesser, D / Emery, G / Fallah Ramazani, V / Fariña, L / Fattorini, A / Font, L / Fruck, C / Fukami, S / Fukazawa, Y / García López, R J / Garczarczyk, M / Gasparyan, S / Gaug, M / Giesbrecht Paiva, J G / Giglietto, N / Giordano, F / Gliwny, P / Godinović, N / Green, J G / Green, D / Hadasch, D / Hahn, A / Hassan, T / Heckmann, L / Herrera, J / Hrupec, D / Hütten, M / Imazawa, R / Inada, T / Iotov, R / Ishio, K / Jiménez Martínez, I / Jormanainen, J / Kerszberg, D / Kobayashi, Y / Kubo, H / Kushida, J / Lamastra, A / Lelas, D / Leone, F / Lindfors, E / Linhoff, L / Lombardi, S / Longo, F / López-Coto, R / López-Moya, M / López-Oramas, A / Loporchio, S / Lorini, A / Lyard, E / Machado de Oliveira Fraga, B / Majumdar, P / Makariev, M / Maneva, G / Mang, N / Manganaro, M / Mangano, S / Mannheim, K / Mariotti, M / Martínez, M / Mas Aguilar, A / Mazin, D / Menchiari, S / Mender, S / Mićanović, S / Miceli, D / Miener, T / Miranda, J M / Mirzoyan, R / Molina, E / Mondal, H A / Moralejo, A / Morcuende, D / Moreno, V / Nakamori, T / Nanci, C / Nava, L / Neustroev, V / Nievas Rosillo, M / Nigro, C / Nilsson, K / Nishijima, K / Njoh Ekoume, T / Noda, K / Nozaki, S / Ohtani, Y / Oka, T / Otero-Santos, J / Paiano, S / Palatiello, M / Paneque, D / Paoletti, R / Paredes, J M / Pavletić, L / Persic, M / Pihet, M / Podobnik, F / Prada Moroni, P G / Prandini, E / Principe, G / Priyadarshi, C / Puljak, I / Rhode, W / Ribó, M / Rico, J / Righi, C / Rugliancich, A / Sahakyan, N / Saito, T / Sakurai, S / Satalecka, K / Saturni, F G / Schleicher, B / Schmidt, K / Schmuckermaier, F / Schubert, J L / Schweizer, T / Sitarek, J / Sliusar, V / Sobczynska, D / Spolon, A / Stamerra, A / Strišković, J / Strom, D / Strzys, M / Suda, Y / Surić, T / Takahashi, M / Takeishi, R / Tavecchio, F / Temnikov, P / Terauchi, K / Terzić, T / Teshima, M / Tosti, L / Truzzi, S / Tutone, A / Ubach, S / van Scherpenberg, J / Vazquez Acosta, M / Ventura, S / Verguilov, V / Viale, I / Vigorito, C F / Vitale, V / Vovk, I / Walter, R / Will, M / Wunderlich, C / Yamamoto, T / Zarić, D / Hiroshima, N / Kohri, K

    Physical review letters

    2022  Band 130, Heft 6, Seite(n) 61002

    Abstract: Linelike features in TeV γ rays constitute a "smoking gun" for TeV-scale particle dark matter and new physics. Probing the Galactic Center region with ground-based Cherenkov telescopes enables the search for TeV spectral features in immediate association ...

    Abstract Linelike features in TeV γ rays constitute a "smoking gun" for TeV-scale particle dark matter and new physics. Probing the Galactic Center region with ground-based Cherenkov telescopes enables the search for TeV spectral features in immediate association with a dense dark matter reservoir at a sensitivity out of reach for satellite γ-ray detectors, and direct detection and collider experiments. We report on 223 hours of observations of the Galactic Center region with the MAGIC stereoscopic telescope system reaching γ-ray energies up to 100 TeV. We improved the sensitivity to spectral lines at high energies using large-zenith-angle observations and a novel background modeling method within a maximum-likelihood analysis in the energy domain. No linelike spectral feature is found in our analysis. Therefore, we constrain the cross section for dark matter annihilation into two photons to ⟨σv⟩≲5×10^{-28}  cm^{3} s^{-1} at 1 TeV and ⟨σv⟩≲1×10^{-25}  cm^{3} s^{-1} at 100 TeV, achieving the best limits to date for a dark matter mass above 20 TeV and a cuspy dark matter profile at the Galactic Center. Finally, we use the derived limits for both cuspy and cored dark matter profiles to constrain supersymmetric wino models.
    Sprache Englisch
    Erscheinungsdatum 2022-04-08
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.130.061002
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Polarized blazar X-rays imply particle acceleration in shocks.

    Liodakis, Ioannis / Marscher, Alan P / Agudo, Iván / Berdyugin, Andrei V / Bernardos, Maria I / Bonnoli, Giacomo / Borman, George A / Casadio, Carolina / Casanova, Vı Ctor / Cavazzuti, Elisabetta / Rodriguez Cavero, Nicole / Di Gesu, Laura / Di Lalla, Niccoló / Donnarumma, Immacolata / Ehlert, Steven R / Errando, Manel / Escudero, Juan / Garcı A-Comas, Maya / Agı S-González, Beatriz /
    Husillos, César / Jormanainen, Jenni / Jorstad, Svetlana G / Kagitani, Masato / Kopatskaya, Evgenia N / Kravtsov, Vadim / Krawczynski, Henric / Lindfors, Elina / Larionova, Elena G / Madejski, Grzegorz M / Marin, Frédéric / Marchini, Alessandro / Marshall, Herman L / Morozova, Daria A / Massaro, Francesco / Masiero, Joseph R / Mawet, Dimitri / Middei, Riccardo / Millar-Blanchaer, Maxwell A / Myserlis, Ioannis / Negro, Michela / Nilsson, Kari / O'Dell, Stephen L / Omodei, Nicola / Pacciani, Luigi / Paggi, Alessandro / Panopoulou, Georgia V / Peirson, Abel L / Perri, Matteo / Petrucci, Pierre-Olivier / Poutanen, Juri / Puccetti, Simonetta / Romani, Roger W / Sakanoi, Takeshi / Savchenko, Sergey S / Sota, Alfredo / Tavecchio, Fabrizio / Tinyanont, Samaporn / Vasilyev, Andrey A / Weaver, Zachary R / Zhovtan, Alexey V / Antonelli, Lucio A / Bachetti, Matteo / Baldini, Luca / Baumgartner, Wayne H / Bellazzini, Ronaldo / Bianchi, Stefano / Bongiorno, Stephen D / Bonino, Raffaella / Brez, Alessandro / Bucciantini, Niccoló / Capitanio, Fiamma / Castellano, Simone / Ciprini, Stefano / Costa, Enrico / De Rosa, Alessandra / Del Monte, Ettore / Di Marco, Alessandro / Doroshenko, Victor / Dovčiak, Michal / Enoto, Teruaki / Evangelista, Yuri / Fabiani, Sergio / Ferrazzoli, Riccardo / Garcia, Javier A / Gunji, Shuichi / Hayashida, Kiyoshi / Heyl, Jeremy / Iwakiri, Wataru / Karas, Vladimir / Kitaguchi, Takao / Kolodziejczak, Jeffery J / La Monaca, Fabio / Latronico, Luca / Maldera, Simone / Manfreda, Alberto / Marinucci, Andrea / Matt, Giorgio / Mitsuishi, Ikuyuki / Mizuno, Tsunefumi / Muleri, Fabio / Ng, Stephen C-Y / Oppedisano, Chiara / Papitto, Alessandro / Pavlov, George G / Pesce-Rollins, Melissa / Pilia, Maura / Possenti, Andrea / Ramsey, Brian D / Rankin, John / Ratheesh, Ajay / Sgró, Carmelo / Slane, Patrick / Soffitta, Paolo / Spandre, Gloria / Tamagawa, Toru / Taverna, Roberto / Tawara, Yuzuru / Tennant, Allyn F / Thomas, Nicolas E / Tombesi, Francesco / Trois, Alessio / Tsygankov, Sergey / Turolla, Roberto / Vink, Jacco / Weisskopf, Martin C / Wu, Kinwah / Xie, Fei / Zane, Silvia

    Nature

    2022  Band 611, Heft 7937, Seite(n) 677–681

    Abstract: Most of the light from blazars, active galactic nuclei with jets of magnetized plasma that point nearly along the line of sight, is produced by high-energy particles, up to around 1 TeV. Although the jets are known to be ultimately powered by a ... ...

    Abstract Most of the light from blazars, active galactic nuclei with jets of magnetized plasma that point nearly along the line of sight, is produced by high-energy particles, up to around 1 TeV. Although the jets are known to be ultimately powered by a supermassive black hole, how the particles are accelerated to such high energies has been an unanswered question. The process must be related to the magnetic field, which can be probed by observations of the polarization of light from the jets. Measurements of the radio to optical polarization-the only range available until now-probe extended regions of the jet containing particles that left the acceleration site days to years earlier
    Sprache Englisch
    Erscheinungsdatum 2022-11-23
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-022-05338-0
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 26: Hefte anzeigen Standort:
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