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  1. Article ; Online: X-ray polarization evidence for a 200-year-old flare of Sgr A

    Marin, Frédéric / Churazov, Eugene / Khabibullin, Ildar / Ferrazzoli, Riccardo / Di Gesu, Laura / Barnouin, Thibault / Di Marco, Alessandro / Middei, Riccardo / Vikhlinin, Alexey / Costa, Enrico / Soffitta, Paolo / Muleri, Fabio / Sunyaev, Rashid / Forman, William / Kraft, Ralph / Bianchi, Stefano / Donnarumma, Immacolata / Petrucci, Pierre-Olivier / Enoto, Teruaki /
    Agudo, Iván / Antonelli, Lucio A / Bachetti, Matteo / Baldini, Luca / Baumgartner, Wayne H / Bellazzini, Ronaldo / Bongiorno, Stephen D / Bonino, Raffaella / Brez, Alessandro / Bucciantini, Niccolò / Capitanio, Fiamma / Castellano, Simone / Cavazzuti, Elisabetta / Chen, Chien-Ting / Ciprini, Stefano / De Rosa, Alessandra / Del Monte, Ettore / Di Lalla, Niccolò / Doroshenko, Victor / Dovčiak, Michal / Ehlert, Steven R / Evangelista, Yuri / Fabiani, Sergio / Garcia, Javier A / Gunji, Shuichi / Hayashida, Kiyoshi / Heyl, Jeremy / Ingram, Adam / Iwakiri, Wataru / Jorstad, Svetlana G / Kaaret, Philip / Karas, Vladimir / Kitaguchi, Takao / Kolodziejczak, Jeffery J / Krawczynski, Henric / La Monaca, Fabio / Latronico, Luca / Liodakis, Ioannis / Maldera, Simone / Manfreda, Alberto / Marinucci, Andrea / Marscher, Alan P / Marshall, Herman L / Massaro, Francesco / Matt, Giorgio / Mitsuishi, Ikuyuki / Mizuno, Tsunefumi / Negro, Michela / Ng, C-Y / O'Dell, Stephen L / Omodei, Nicola / Oppedisano, Chiara / Papitto, Alessandro / Pavlov, George G / Peirson, Abel L / Perri, Matteo / Pesce-Rollins, Melissa / Pilia, Maura / Possenti, Andrea / Poutanen, Juri / Puccetti, Simonetta / Ramsey, Brian D / Rankin, John / Ratheesh, Ajay / Roberts, Oliver J / Romani, Roger W / Sgrò, Carmelo / Slane, Patrick / Spandre, Gloria / Swartz, Doug / Tamagawa, Toru / Tavecchio, Fabrizio / Taverna, Roberto / Tawara, Yuzuru / Tennant, Allyn F / Thomas, Nicholas E / Tombesi, Francesco / Trois, Alessio / Tsygankov, Sergey S / Turolla, Roberto / Vink, Jacco / Weisskopf, Martin C / Wu, Kinwah / Xie, Fei / Zane, Silvia

    Nature

    2023  Volume 619, Issue 7968, Page(s) 41–45

    Abstract: The centre of the Milky Way Galaxy hosts a black hole with a solar mass of about 4 million (Sagittarius ... ...

    Abstract The centre of the Milky Way Galaxy hosts a black hole with a solar mass of about 4 million (Sagittarius A
    Language English
    Publishing date 2023-06-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-023-06064-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Vela pulsar wind nebula X-rays are polarized to near the synchrotron limit.

    Xie, Fei / Di Marco, Alessandro / La Monaca, Fabio / Liu, Kuan / Muleri, Fabio / Bucciantini, Niccolò / Romani, Roger W / Costa, Enrico / Rankin, John / Soffitta, Paolo / Bachetti, Matteo / Di Lalla, Niccolò / Fabiani, Sergio / Ferrazzoli, Riccardo / Gunji, Shuichi / Latronico, Luca / Negro, Michela / Omodei, Nicola / Pilia, Maura /
    Trois, Alessio / Watanabe, Eri / Agudo, Iván / Antonelli, Lucio A / Baldini, Luca / Baumgartner, Wayne H / Bellazzini, Ronaldo / Bianchi, Stefano / Bongiorno, Stephen D / Bonino, Raffaella / Brez, Alessandro / Capitanio, Fiamma / Castellano, Simone / Cavazzuti, Elisabetta / Ciprini, Stefano / De Rosa, Alessandra / Del Monte, Ettore / Di Gesu, Laura / Donnarumma, Immacolata / Doroshenko, Victor / Dovčiak, Michal / Ehlert, Steven R / Enoto, Teruaki / Evangelista, Yuri / Garcia, Javier A / Hayashida, Kiyoshi / Heyl, Jeremy / Iwakiri, Wataru / Jorstad, Svetlana G / Karas, Vladimir / Kitaguchi, Takao / Kolodziejczak, Jeffery J / Krawczynski, Henric / Liodakis, Ioannis / Maldera, Simone / Manfreda, Alberto / Marin, Frédéric / Marinucci, Andrea / Marscher, Alan P / Marshall, Herman L / Massaro, Francesco / Matt, Giorgio / Mitsuishi, Ikuyuki / Mizuno, Tsunefumi / Ng, C-Y / O'Dell, Stephen L / Oppedisano, Chiara / Papitto, Alessandro / Pavlov, George G / Peirson, Abel L / Perri, Matteo / Pesce-Rollins, Melissa / Petrucci, Pierre-Olivier / Possenti, Andrea / Poutanen, Juri / Puccetti, Simonetta / Ramsey, Brian D / Ratheesh, Ajay / Sgró, Carmelo / Slane, Patrick / Spandre, Gloria / Tamagawa, Toru / Tavecchio, Fabrizio / Taverna, Roberto / Tawara, Yuzuru / Tennant, Allyn F / Thomas, Nicolas E / Tombesi, Francesco / Tsygankov, Sergey S / Turolla, Roberto / Vink, Jacco / Weisskopf, Martin C / Wu, Kinwah / Zane, Silvia

    Nature

    2022  Volume 612, Issue 7941, Page(s) 658–660

    Abstract: Pulsar wind nebulae are formed when outflows of relativistic electrons and positrons hit the surrounding supernova remnant or interstellar medium at a shock front. The Vela pulsar wind nebula is powered by a young pulsar (B0833-45, aged 11,000 years) ...

    Abstract Pulsar wind nebulae are formed when outflows of relativistic electrons and positrons hit the surrounding supernova remnant or interstellar medium at a shock front. The Vela pulsar wind nebula is powered by a young pulsar (B0833-45, aged 11,000 years)
    Language English
    Publishing date 2022-12-21
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-022-05476-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Polarized x-rays from a magnetar.

    Taverna, Roberto / Turolla, Roberto / Muleri, Fabio / Heyl, Jeremy / Zane, Silvia / Baldini, Luca / González-Caniulef, Denis / Bachetti, Matteo / Rankin, John / Caiazzo, Ilaria / Di Lalla, Niccolò / Doroshenko, Victor / Errando, Manel / Gau, Ephraim / Kırmızıbayrak, Demet / Krawczynski, Henric / Negro, Michela / Ng, Mason / Omodei, Nicola /
    Possenti, Andrea / Tamagawa, Toru / Uchiyama, Keisuke / Weisskopf, Martin C / Agudo, Ivan / Antonelli, Lucio A / Baumgartner, Wayne H / Bellazzini, Ronaldo / Bianchi, Stefano / Bongiorno, Stephen D / Bonino, Raffaella / Brez, Alessandro / Bucciantini, Niccolò / Capitanio, Fiamma / Castellano, Simone / Cavazzuti, Elisabetta / Ciprini, Stefano / Costa, Enrico / De Rosa, Alessandra / Del Monte, Ettore / Di Gesu, Laura / Di Marco, Alessandro / Donnarumma, Immacolata / Dovčiak, Michal / Ehlert, Steven R / Enoto, Teruaki / Evangelista, Yuri / Fabiani, Sergio / Ferrazzoli, Riccardo / Garcia, Javier A / Gunji, Shuichi / Hayashida, Kiyoshi / Iwakiri, Wataru / Jorstad, Svetlana G / Karas, Vladimir / Kitaguchi, Takao / Kolodziejczak, Jeffery J / La Monaca, Fabio / Latronico, Luca / Liodakis, Ioannis / Maldera, Simone / Manfreda, Alberto / Marin, Frédéric / Marinucci, Andrea / Marscher, Alan P / Marshall, Herman L / Matt, Giorgio / Mitsuishi, Ikuyuki / Mizuno, Tsunefumi / Ng, Stephen C-Y / O'Dell, Stephen L / Oppedisano, Chiara / Papitto, Alessandro / Pavlov, George G / Peirson, Abel L / Perri, Matteo / Pesce-Rollins, Melissa / Pilia, Maura / Poutanen, Juri / Puccetti, Simonetta / Ramsey, Brian D / Ratheesh, Ajay / Romani, Roger W / Sgrò, Carmelo / Slane, Patrick / Soffitta, Paolo / Spandre, Gloria / Tavecchio, Fabrizio / Tawara, Yuzuru / Tennant, Allyn F / Thomas, Nicholas E / Tombesi, Francesco / Trois, Alessio / Tsygankov, Sergey S / Vink, Jacco / Wu, Kinwah / Xie, Fei

    Science (New York, N.Y.)

    2022  Volume 378, Issue 6620, Page(s) 646–650

    Abstract: Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magnetar 4U 0142+61 ... ...

    Abstract Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magnetar 4U 0142+61 using the Imaging X-ray Polarimetry Explorer and found a linear polarization degree of 13.5 ± 0.8% averaged over the 2- to 8-kilo-electron volt band. The polarization changes with energy: The degree is 15.0 ± 1.0% at 2 to 4 kilo-electron volts, drops below the instrumental sensitivity ~4 to 5 kilo-electron volts, and rises to 35.2 ± 7.1% at 5.5 to 8 kilo-electron volts. The polarization angle also changes by 90° at ~4 to 5 kilo-electron volts. These results are consistent with a model in which thermal radiation from the magnetar surface is reprocessed by scattering off charged particles in the magnetosphere.
    Language English
    Publishing date 2022-11-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.add0080
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; 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  Volume 611, Issue 7937, Page(s) 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
    Language English
    Publishing date 2022-11-23
    Publishing country England
    Document type 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
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Polarized x-rays constrain the disk-jet geometry in the black hole x-ray binary Cygnus X-1.

    Krawczynski, Henric / Muleri, Fabio / Dovčiak, Michal / Veledina, Alexandra / Rodriguez Cavero, Nicole / Svoboda, Jiri / Ingram, Adam / Matt, Giorgio / Garcia, Javier A / Loktev, Vladislav / Negro, Michela / Poutanen, Juri / Kitaguchi, Takao / Podgorný, Jakub / Rankin, John / Zhang, Wenda / Berdyugin, Andrei / Berdyugina, Svetlana V / Bianchi, Stefano /
    Blinov, Dmitry / Capitanio, Fiamma / Di Lalla, Niccolò / Draghis, Paul / Fabiani, Sergio / Kagitani, Masato / Kravtsov, Vadim / Kiehlmann, Sebastian / Latronico, Luca / Lutovinov, Alexander A / Mandarakas, Nikos / Marin, Frédéric / Marinucci, Andrea / Miller, Jon M / Mizuno, Tsunefumi / Molkov, Sergey V / Omodei, Nicola / Petrucci, Pierre-Olivier / Ratheesh, Ajay / Sakanoi, Takeshi / Semena, Andrei N / Skalidis, Raphael / Soffitta, Paolo / Tennant, Allyn F / Thalhammer, Phillipp / Tombesi, Francesco / Weisskopf, Martin C / Wilms, Joern / Zhang, Sixuan / Agudo, Iván / Antonelli, Lucio A / Bachetti, Matteo / Baldini, Luca / Baumgartner, Wayne H / Bellazzini, Ronaldo / Bongiorno, Stephen D / Bonino, Raffaella / Brez, Alessandro / Bucciantini, Niccolò / Castellano, Simone / Cavazzuti, Elisabetta / Ciprini, Stefano / Costa, Enrico / De Rosa, Alessandra / Del Monte, Ettore / Di Gesu, Laura / Di Marco, Alessandro / Donnarumma, Immacolata / Doroshenko, Victor / Ehlert, Steven R / Enoto, Teruaki / Evangelista, Yuri / Ferrazzoli, Riccardo / Gunji, Shuichi / Hayashida, Kiyoshi / Heyl, Jeremy / Iwakiri, Wataru / Jorstad, Svetlana G / Karas, Vladimir / Kolodziejczak, Jeffery J / La Monaca, Fabio / Liodakis, Ioannis / Maldera, Simone / Manfreda, Alberto / Marscher, Alan P / Marshall, Herman L / Mitsuishi, Ikuyuki / Ng, Chi-Yung / O'Dell, Stephen L / Oppedisano, Chiara / Papitto, Alessandro / Pavlov, George G / Peirson, Abel L / Perri, Matteo / Pesce-Rollins, Melissa / Pilia, Maura / Possenti, Andrea / Puccetti, Simonetta / Ramsey, Brian D / Romani, Roger W / Sgrò, Carmelo / Slane, Patrick / Spandre, Gloria / Tamagawa, Toru / Tavecchio, Fabrizio / Taverna, Roberto / Tawara, Yuzuru / Thomas, Nicholas E / Trois, Alessio / Tsygankov, Sergey / Turolla, Roberto / Vink, Jacco / Wu, Kinwah / Xie, Fei / Zane, Silvia

    Science (New York, N.Y.)

    2022  Volume 378, Issue 6620, Page(s) 650–654

    Abstract: A black hole x-ray binary (XRB) system forms when gas is stripped from a normal star and accretes onto a black hole, which heats the gas sufficiently to emit x-rays. We report a polarimetric observation of the XRB Cygnus X-1 using the Imaging X-ray ... ...

    Abstract A black hole x-ray binary (XRB) system forms when gas is stripped from a normal star and accretes onto a black hole, which heats the gas sufficiently to emit x-rays. We report a polarimetric observation of the XRB Cygnus X-1 using the Imaging X-ray Polarimetry Explorer. The electric field position angle aligns with the outflowing jet, indicating that the jet is launched from the inner x-ray-emitting region. The polarization degree is 4.01 ± 0.20% at 2 to 8 kiloelectronvolts, implying that the accretion disk is viewed closer to edge-on than the binary orbit. These observations reveal that hot x-ray-emitting plasma is spatially extended in a plane perpendicular to, not parallel to, the jet axis.
    Language English
    Publishing date 2022-11-03
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.add5399
    Database MEDical Literature Analysis and Retrieval System OnLINE

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