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Deep eROSITA observations of the magnificent seven isolated neutron stars

Published online by Cambridge University Press:  27 February 2023

Adriana Mancini Pires Open the ORCID record for Adriana Mancini Pires [Opens in a new window] ,
Axel Schwope  and
Jan Kurpas Open the ORCID record for Jan Kurpas [Opens in a new window]
Adriana Mancini Pires
Affiliation:
Leibniz Institute for Astrophysics Potsdam (AIP) An der Sternwarte 16, 14482, Potsdam, Germany email: apires@aip.de
Axel Schwope
Affiliation:
Leibniz Institute for Astrophysics Potsdam (AIP) An der Sternwarte 16, 14482, Potsdam, Germany email: apires@aip.de
Jan Kurpas
Affiliation:
Leibniz Institute for Astrophysics Potsdam (AIP) An der Sternwarte 16, 14482, Potsdam, Germany email: apires@aip.de
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Abstract

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We report the initial results of deep eROSITA monitoring of the magnificent seven isolated neutron stars (INSs). Thanks to a combination of high count statistics and good energy resolution, the eROSITA datasets unveil the increasingly complex energy distribution of these presumably simple thermal emitters. For three targets, we report the detection of multiple (in some cases, phase-dependent) spectral absorption features and deviations from the dominant thermal continuum. Unexpected long-term changes of spectral state and timing behaviour have additionally been observed for two INSs. The results pose challenging theoretical questions on the nature of the variations and absorption features and ultimately impact the modeling of the atmosphere and cooling of highly magnetised neutron stars.

Keywords

surveysstars: neutronX-rays: individual (RX J0720.4-3125RX J1605.3+3249RX J2143.0+0654)
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S363: Neutron Star Astrophysics at the Crossroads: Magnetars and the Multimessenger Revolution , June 2020 , pp. 288 - 292
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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