The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by
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 an...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
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IOP Publishing
2017
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| Online Access: | http://hdl.handle.net/1721.1/112096 |
| _version_ | 1826200663271407616 |
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| author | Murphy, K. D. Marshall, Herman Nowak, Michael A. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Murphy, K. D. Marshall, Herman Nowak, Michael A. |
| author_sort | Murphy, K. D. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T11:39:55Z |
| format | Article |
| id | mit-1721.1/112096 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T11:39:55Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1120962022-10-01T05:08:12Z The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by Murphy, K. D. Marshall, Herman Nowak, Michael A. MIT Kavli Institute for Astrophysics and Space Research Nowak, Michael A Marshall, Herman 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. 2017-10-31T15:13:08Z 2017-10-31T15:13:08Z 2017-05 2017-04 2017-10-19T14:58:13Z Article http://purl.org/eprint/type/JournalArticle 1538-4357 0004-637X http://hdl.handle.net/1721.1/112096 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 http://dx.doi.org/10.3847/1538-4357/aa6d6a Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing IOP Publishing |
| spellingShingle | Murphy, K. D. Marshall, Herman Nowak, Michael A. The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by |
| title | The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by |
| title_full | The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by |
| title_fullStr | The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by |
| title_full_unstemmed | The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by |
| title_short | The Nuclear X-Ray Emission-line Structure in NGC 2992 Revealed by |
| title_sort | nuclear x ray emission line structure in ngc 2992 revealed by |
| url | http://hdl.handle.net/1721.1/112096 |
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