The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by
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Murphy_2017_ApJ_840_120.pdf
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Author(s)
Murphy, K. D.
Marshall, Herman
Nowak, Michael A.
Date Issued
May 2017
Journal
Astrophysical Journal
Publisher
IOP Publishing
Citation
Murphy, K. D. et al. “The Nuclear X-Ray Emission-Line Structure in NGC 2992 Revealed by Chandra-HETGS.” The Astrophysical Journal 840, 2 (May 2017): 120 © 2017 The American Astronomical Society
Version
Final published version
Abstract
We present the narrow emission-line structure revealed by a 135 ks Chandra observation of Seyfert galaxy NGC 2992, using the High Energy Transmission Grating Spectrometer. The source was observed in an historically low-flux state. Using a Bayesian Block search technique, we detected neutral Si Kα and S Kα fluorescence and two additional lines that are consistent with redshifted, ionized Si emission. The latter two features are indicative of a photoionized outflow with a velocity of ∼ 2500 km s⁻¹. We also observed prominent, unresolved line emission at the rest energy of Fe Kα, with a 90% confidence FWHM velocity width of < 2000 km s⁻¹ ( < 2800 km s⁻¹) and equivalent width of 406-1148 eV (288-858 eV) when broad Fe Kα line emission, as detected by Suzaku, was (was not) included in the model.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.3847/1538-4357/aa6d6a
