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NuSTAR Observations of G11.2–0.3

Madsen, K. K. and Fryer, C. L. and Grefenstette, B. W. and Lopez, L. A. and Reynolds, S. and Zoglauer, A. (2020) NuSTAR Observations of G11.2–0.3. Astrophysical Journal, 889 (1). Art. No. 23. ISSN 1538-4357. doi:10.3847/1538-4357/ab54ca.

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We present in this paper the hard X-ray view of the pulsar wind nebula in G11.2−0.3 and its central pulsar powered pulsar J1811−1925 as seen by NuSTAR. We complement the data with Chandra for a more complete picture and confirm the existence of a hard, power-law component in the shell with photon index Γ = 2.1 ± 0.1, which we attribute to synchrotron emission. Our imaging observations of the shell show a slightly smaller radius at higher energies, consistent with Chandra results, and we find shrinkage as a function of increased energy along the jet direction, indicating that the electron outflow in the PWN may be simpler than that seen in other young PWNe. Combining NuSTAR with INTEGRAL, we find that the pulsar spectrum can be fit by a power law with Γ = 1.32 ± 0.07 up to 300 keV without evidence of curvature.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Madsen, K. K.0000-0003-1252-4891
Fryer, C. L.0000-0003-2624-0056
Grefenstette, B. W.0000-0002-1984-2932
Lopez, L. A.0000-0002-1790-3148
Reynolds, S.0000-0002-5365-5444
Zoglauer, A.0000-0001-9067-3150
Additional Information:© 2020 The American Astronomical Society. Received 2019 April 4; revised 2019 October 31; accepted 2019 November 4; published 2020 January 21. This work was supported under NASA Contract No. NNG08FD60C, and made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. We thank the NuSTAR Operations, Software and Calibration teams for support with the execution and analysis of these observations. This research has made use of the NuSTAR Data Analysis Software (NuSTARDAS) jointly developed by the ASI Science Data Center (ASDC, Italy) and the California Institute of Technology (USA). We would also like to thank Robert Archibald for his help with finding the timing solution. Facility: NuSTAR Chandra INTEGRAL - .
Group:NuSTAR, Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:Rotation powered pulsars; Supernova remnants; Single X-ray stars; X-ray stars
Issue or Number:1
Classification Code:Unified Astronomy Thesaurus concepts: Rotation powered pulsars (1408); Supernova remnants (1667); Single X-ray stars (1461); X-ray stars (1832)
Record Number:CaltechAUTHORS:20200122-085827125
Persistent URL:
Official Citation:K. K. Madsen et al 2020 ApJ 889 23
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100829
Deposited By: Tony Diaz
Deposited On:22 Jan 2020 17:07
Last Modified:16 Nov 2021 17:57

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