An iron K component to the ultrafast outflow in NGC 1313 X-1

Journal Article · Mon Aug 01 04:00:00 UTC 2016 · Astrophysical Journal Letters

DOI:https://doi.org/10.3847/2041-8205/826/2/L26· OSTI ID:22868835

Walton, D. J.; Stern, D. ^[1]; Middleton, M. J.; Pinto, C.; Fabian, A. C. ^[2]; Bachetti, M. ^[3]; Barret, D. ^[4]; Brightman, M.; Fuerst, F.; Harrison, F. A. ^[5]; Miller, J. M. ^[6]

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1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)
2. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom)
3. INAF/Osservatorio Astronomico di Cagliari, via della Scienza 5, I-09047 Selargius (Canada) (Italy)
4. Universite de Toulouse, UPS-OMP, IRAP, Toulouse (France)
5. Space Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125 (United States)
6. Department of Astronomy, University of Michigan, 1085 S. University Avenue, Ann Arbor, MI 49109-1107 (United States)

We present the detection of an absorption feature at E=8.77{sub −0.06}{sup +0.05} 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.

• OSTI ID: 22868835
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 826; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION
BLACK HOLES
DETECTION
HYPOTHESIS
IRON
KEV RANGE
PHOTOIONIZATION
SIMULATION
X-RAY SOURCES
X-RAY SPECTRA