X-ray pulsar GRO J1008-57 as an orthogonal rotator

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

doi:10.1051/0004-6361/202346134

X-ray pulsar GRO J1008-57 as an orthogonal rotator

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

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

X-ray polarimetry is a unique way to probe the geometrical configuration of highly magnetized accreting neutron stars (X-ray pulsars). GRO J1008-57 is the first transient X-ray pulsar observed at two different flux levels by the Imaging X-ray Polarimetry Explorer (IXPE) during its outburst in November 2022. We find the polarization properties of GRO J1008-57 to be independent of its luminosity, with the polarization degree varying between nondetection and about 15% over the pulse phase. Fitting the phase-resolved spectro-polarimetric data with the rotating vector model allowed us to estimate the pulsar inclination (130, which is in good agreement with the orbital inclination), the position angle (75) of the pulsar spin axis, and the magnetic obliquity (74). This makes GRO J1008-57 the first confidently identified nearly orthogonal rotator among X-ray pulsars. We discuss our results in the context of the neutron star atmosphere models and theories of the axis alignment of accreting pulsars.

Original language	English (US)
Article number	A48
Journal	Astronomy and Astrophysics
Volume	675
DOIs	https://doi.org/10.1051/0004-6361/202346134
State	Published - Jul 1 2023

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361/202346134

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Tsygankov, S. S., Doroshenko, V., Mushtukov, A. A., Poutanen, J., Di Marco, A., Heyl, J., La Monaca, F., Forsblom, S. V., Malacaria, C., Marshall, H. L., Suleimanov, V. F., Svoboda, J., Taverna, R., Ursini, F., Agudo, I., Antonelli, L. A., Bachetti, M., Baldini, L., Baumgartner, W. H., ... Zane, S. (2023). X-ray pulsar GRO J1008-57 as an orthogonal rotator. Astronomy and Astrophysics, 675, Article A48. https://doi.org/10.1051/0004-6361/202346134

@article{4fe67e619adb4dbbae0a43dfa6ff4ddc,

title = "X-ray pulsar GRO J1008-57 as an orthogonal rotator",

abstract = "X-ray polarimetry is a unique way to probe the geometrical configuration of highly magnetized accreting neutron stars (X-ray pulsars). GRO J1008-57 is the first transient X-ray pulsar observed at two different flux levels by the Imaging X-ray Polarimetry Explorer (IXPE) during its outburst in November 2022. We find the polarization properties of GRO J1008-57 to be independent of its luminosity, with the polarization degree varying between nondetection and about 15% over the pulse phase. Fitting the phase-resolved spectro-polarimetric data with the rotating vector model allowed us to estimate the pulsar inclination (130, which is in good agreement with the orbital inclination), the position angle (75) of the pulsar spin axis, and the magnetic obliquity (74). This makes GRO J1008-57 the first confidently identified nearly orthogonal rotator among X-ray pulsars. We discuss our results in the context of the neutron star atmosphere models and theories of the axis alignment of accreting pulsars.",

author = "Tsygankov, {Sergey S.} and Victor Doroshenko and Mushtukov, {Alexander A.} and Juri Poutanen and {Di Marco}, Alessandro and Jeremy Heyl and {La Monaca}, Fabio and Forsblom, {Sofia V.} and Christian Malacaria and Marshall, {Herman L.} and Suleimanov, {Valery F.} and Jiri Svoboda and Roberto Taverna and Francesco Ursini and Iv{\'a}n Agudo and Antonelli, {Lucio A.} and Matteo Bachetti and Luca Baldini and Baumgartner, {Wayne H.} and Ronaldo Bellazzini and Stefano Bianchi and Bongiorno, {Stephen D.} and Raffaella Bonino and Alessandro Brez and Niccolo Bucciantini and Fiamma Capitanio and Simone Castellano and Elisabetta Cavazzuti and Chen, {Chien Ting} and Stefano Ciprini and Enrico Costa and {De Rosa}, Alessandra and {Del Monte}, Ettore and {Di Gesu}, Laura and {Di Lalla}, Niccolo and Immacolata Donnarumma and Michal Dov{\v c}iak and Ehlert, {Steven R.} and Teruaki Enoto and Yuri Evangelista and Sergio Fabiani and Riccardo Ferrazzoli and Garcia, {Javier A.} and Shuichi Gunji and Kiyoshi Hayashida and Wataru Iwakiri and Jorstad, {Svetlana G.} and Philip Kaaret and Vladimir Karas and Fabian Kislat and Takao Kitaguchi and Kolodziejczak, {Jeffery J.} and Henric Krawczynski and Luca Latronico and Ioannis Liodakis and Simone Maldera and Alberto Manfreda and Fr{\'e}d{\'e}ric Marin and Andrea Marinucci and Marscher, {Alan P.} and Francesco Massaro and Giorgio Matt and Ikuyuki Mitsuishi and Tsunefumi Mizuno and Fabio Muleri and Michela Negro and Ng, {Chi Yung} and Oa'dell, {Stephen L.} and Nicola Omodei and Chiara Oppedisano and Alessandro Papitto and Pavlov, {George G.} and Peirson, {Abel L.} and Matteo Perri and Melissa Pesce-Rollins and Petrucci, {Pierre Olivier} and Maura Pilia and Andrea Possenti and Simonetta Puccetti and Ramsey, {Brian D.} and John Rankin and Ajay Ratheesh and Roberts, {Oliver J.} and Romani, {Roger W.} and Carmelo Sgr{\`o} and Patrick Slane and Paolo Soffitta and Gloria Spandre and Swartz, {Douglas A.} and Toru Tamagawa and Fabrizio Tavecchio and Yuzuru Tawara and Tennant, {Allyn F.} and Thomas, {Nicholas E.} and Francesco Tombesi and Alessio Trois and Roberto Turolla and Jacco Vink and Weisskopf, {Martin C.} and Kinwah Wu and Fei Xie and Silvia Zane",

note = "Publisher Copyright: {\textcopyright} 2023 Authors.",

year = "2023",

month = jul,

day = "1",

doi = "10.1051/0004-6361/202346134",

language = "English (US)",

volume = "675",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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Tsygankov, SS, Doroshenko, V, Mushtukov, AA, Poutanen, J, Di Marco, A, Heyl, J, La Monaca, F, Forsblom, SV, Malacaria, C, Marshall, HL, Suleimanov, VF, Svoboda, J, Taverna, R, Ursini, F, Agudo, I, Antonelli, LA, Bachetti, M, Baldini, L, Baumgartner, WH, Bellazzini, R, Bianchi, S, Bongiorno, SD, Bonino, R, Brez, A, Bucciantini, N, Capitanio, F, Castellano, S, Cavazzuti, E, Chen, CT, Ciprini, S, Costa, E, De Rosa, A, Del Monte, E, Di Gesu, L, Di Lalla, N, Donnarumma, I, Dovčiak, M, Ehlert, SR, Enoto, T, Evangelista, Y, Fabiani, S, Ferrazzoli, R, Garcia, JA, Gunji, S, Hayashida, K, Iwakiri, W, Jorstad, SG, Kaaret, P, Karas, V, Kislat, F, Kitaguchi, T, Kolodziejczak, JJ, Krawczynski, H, Latronico, L, Liodakis, I, Maldera, S, Manfreda, A, Marin, F, Marinucci, A, Marscher, AP, Massaro, F, Matt, G, Mitsuishi, I, Mizuno, T, Muleri, F, Negro, M, Ng, CY, Oa'dell, SL, Omodei, N, Oppedisano, C, Papitto, A, Pavlov, GG, Peirson, AL, Perri, M, Pesce-Rollins, M, Petrucci, PO, Pilia, M, Possenti, A, Puccetti, S, Ramsey, BD, Rankin, J, Ratheesh, A, Roberts, OJ, Romani, RW, Sgrò, C, Slane, P, Soffitta, P, Spandre, G, Swartz, DA, Tamagawa, T, Tavecchio, F, Tawara, Y, Tennant, AF, Thomas, NE, Tombesi, F, Trois, A, Turolla, R, Vink, J, Weisskopf, MC, Wu, K, Xie, F & Zane, S 2023, 'X-ray pulsar GRO J1008-57 as an orthogonal rotator', Astronomy and Astrophysics, vol. 675, A48. https://doi.org/10.1051/0004-6361/202346134

TY - JOUR

T1 - X-ray pulsar GRO J1008-57 as an orthogonal rotator

AU - Tsygankov, Sergey S.

AU - Doroshenko, Victor

AU - Mushtukov, Alexander A.

AU - Poutanen, Juri

AU - Di Marco, Alessandro

AU - Heyl, Jeremy

AU - La Monaca, Fabio

AU - Forsblom, Sofia V.

AU - Malacaria, Christian

AU - Marshall, Herman L.

AU - Suleimanov, Valery F.

AU - Svoboda, Jiri

AU - Taverna, Roberto

AU - Ursini, Francesco

AU - Agudo, Iván

AU - Antonelli, Lucio A.

AU - Bachetti, Matteo

AU - Baldini, Luca

AU - Baumgartner, Wayne H.

AU - Bellazzini, Ronaldo

AU - Bianchi, Stefano

AU - Bongiorno, Stephen D.

AU - Bonino, Raffaella

AU - Brez, Alessandro

AU - Bucciantini, Niccolo

AU - Capitanio, Fiamma

AU - Castellano, Simone

AU - Cavazzuti, Elisabetta

AU - Chen, Chien Ting

AU - Ciprini, Stefano

AU - Costa, Enrico

AU - De Rosa, Alessandra

AU - Del Monte, Ettore

AU - Di Gesu, Laura

AU - Di Lalla, Niccolo

AU - Donnarumma, Immacolata

AU - Dovčiak, Michal

AU - Ehlert, Steven R.

AU - Enoto, Teruaki

AU - Evangelista, Yuri

AU - Fabiani, Sergio

AU - Ferrazzoli, Riccardo

AU - Garcia, Javier A.

AU - Gunji, Shuichi

AU - Hayashida, Kiyoshi

AU - Iwakiri, Wataru

AU - Jorstad, Svetlana G.

AU - Kaaret, Philip

AU - Karas, Vladimir

AU - Kislat, Fabian

AU - Kitaguchi, Takao

AU - Kolodziejczak, Jeffery J.

AU - Krawczynski, Henric

AU - Latronico, Luca

AU - Liodakis, Ioannis

AU - Maldera, Simone

AU - Manfreda, Alberto

AU - Marin, Frédéric

AU - Marinucci, Andrea

AU - Marscher, Alan P.

AU - Massaro, Francesco

AU - Matt, Giorgio

AU - Mitsuishi, Ikuyuki

AU - Mizuno, Tsunefumi

AU - Muleri, Fabio

AU - Negro, Michela

AU - Ng, Chi Yung

AU - Oa'dell, Stephen L.

AU - Omodei, Nicola

AU - Oppedisano, Chiara

AU - Papitto, Alessandro

AU - Pavlov, George G.

AU - Peirson, Abel L.

AU - Perri, Matteo

AU - Pesce-Rollins, Melissa

AU - Petrucci, Pierre Olivier

AU - Pilia, Maura

AU - Possenti, Andrea

AU - Puccetti, Simonetta

AU - Ramsey, Brian D.

AU - Rankin, John

AU - Ratheesh, Ajay

AU - Roberts, Oliver J.

AU - Romani, Roger W.

AU - Sgrò, Carmelo

AU - Slane, Patrick

AU - Soffitta, Paolo

AU - Spandre, Gloria

AU - Swartz, Douglas A.

AU - Tamagawa, Toru

AU - Tavecchio, Fabrizio

AU - Tawara, Yuzuru

AU - Tennant, Allyn F.

AU - Thomas, Nicholas E.

AU - Tombesi, Francesco

AU - Trois, Alessio

AU - Turolla, Roberto

AU - Vink, Jacco

AU - Weisskopf, Martin C.

AU - Wu, Kinwah

AU - Xie, Fei

AU - Zane, Silvia

PY - 2023/7/1

Y1 - 2023/7/1

N2 - X-ray polarimetry is a unique way to probe the geometrical configuration of highly magnetized accreting neutron stars (X-ray pulsars). GRO J1008-57 is the first transient X-ray pulsar observed at two different flux levels by the Imaging X-ray Polarimetry Explorer (IXPE) during its outburst in November 2022. We find the polarization properties of GRO J1008-57 to be independent of its luminosity, with the polarization degree varying between nondetection and about 15% over the pulse phase. Fitting the phase-resolved spectro-polarimetric data with the rotating vector model allowed us to estimate the pulsar inclination (130, which is in good agreement with the orbital inclination), the position angle (75) of the pulsar spin axis, and the magnetic obliquity (74). This makes GRO J1008-57 the first confidently identified nearly orthogonal rotator among X-ray pulsars. We discuss our results in the context of the neutron star atmosphere models and theories of the axis alignment of accreting pulsars.

AB - X-ray polarimetry is a unique way to probe the geometrical configuration of highly magnetized accreting neutron stars (X-ray pulsars). GRO J1008-57 is the first transient X-ray pulsar observed at two different flux levels by the Imaging X-ray Polarimetry Explorer (IXPE) during its outburst in November 2022. We find the polarization properties of GRO J1008-57 to be independent of its luminosity, with the polarization degree varying between nondetection and about 15% over the pulse phase. Fitting the phase-resolved spectro-polarimetric data with the rotating vector model allowed us to estimate the pulsar inclination (130, which is in good agreement with the orbital inclination), the position angle (75) of the pulsar spin axis, and the magnetic obliquity (74). This makes GRO J1008-57 the first confidently identified nearly orthogonal rotator among X-ray pulsars. We discuss our results in the context of the neutron star atmosphere models and theories of the axis alignment of accreting pulsars.

UR - http://www.scopus.com/inward/record.url?scp=85164535605&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85164535605&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202346134

DO - 10.1051/0004-6361/202346134

M3 - Article

AN - SCOPUS:85164535605

SN - 0004-6361

VL - 675

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A48

ER -

X-ray pulsar GRO J1008-57 as an orthogonal rotator

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