An Iron K Component to the Ultrafast Outflow in NGC 1313 X-1
Abstract
We present the detection of an absorption feature at E = 8.77^(+0.05)_(-0.06) keV in the combined X-ray spectrum of the ultraluminous X-ray source NGC 1313 X-1 observed with XMM-Newton and NuSTAR, significant at the 3σ level. If associated with blueshifted ionized iron, the implied outflow velocity is ~0.2c for Fe xxvi, or ~0.25c for Fe xxv. These velocities are similar to the ultrafast outflow seen in absorption recently discovered in this source at lower energies by XMM-Newton, and we therefore conclude that this is an iron component to the same outflow. Photoionization modeling marginally prefers the Fe xxv solution, but in either case the outflow properties appear to be extreme, potentially supporting a super-Eddington hypothesis for NGC 1313 X-1.
Additional Information
© 2016 The American Astronomical Society. Received 2016 June 30; revised 2016 July 6; accepted 2016 July 6; published 2016 July 29. The authors would like to thank the anonymous referee for their extremely timely and positive feedback, which helped improve the final manuscript. M.J.M. acknowledges support from an STFC Ernest Rutherford fellowship, C.P. and A.C.F. acknowledge support from ERC Advanced Grant 340442, and D.B. acknowledges financial support from the French Space Agency (CNES). This research has made use of data obtained with NuSTAR, a project led by Caltech, funded by NASA, and managed by NASA/JPL, and has utilized the NUSTARDAS software package, jointly developed by the ASDC (Italy) and Caltech (USA). This research has also made use of data obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States. Facilities: NuSTAR, XMM.Attached Files
Published - apjl_826_2_L26.pdf
Submitted - 1607.03124v1.pdf
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Additional details
- Eprint ID
- 69311
- Resolver ID
- CaltechAUTHORS:20160729-114600441
- Science and Technology Facilities Council (STFC)
- European Research Council (ERC)
- 340442
- Centre National d'Études Spatiales (CNES)
- NASA/JPL/Caltech
- Created
-
2016-07-29Created from EPrint's datestamp field
- Updated
-
2021-11-11Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory, NuSTAR
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 2016-51