A Sharper View of the X-ray Spectrum of MCG--6-30-15 with XRISM, XMM-Newton and NuSTAR
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911201776107520 |
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| author | Brenneman, Laura W. Wilkins, Daniel R. Ogorzałek, Anna Rogantini, Daniele Fabian, Andrew C. García, Javier A. Juráňová, Anna Mizumoto, Misaki Noda, Hirofumi Behar, Ehud Boissay-Malaquin, Rozenn Guainazzi, Matteo Okajima, Takashi Hoffman, Erika Keshet, Noa Kaastra, Jelle Kara, Erin Yamauchi, Makoto |
| author_facet | Brenneman, Laura W. Wilkins, Daniel R. Ogorzałek, Anna Rogantini, Daniele Fabian, Andrew C. García, Javier A. Juráňová, Anna Mizumoto, Misaki Noda, Hirofumi Behar, Ehud Boissay-Malaquin, Rozenn Guainazzi, Matteo Okajima, Takashi Hoffman, Erika Keshet, Noa Kaastra, Jelle Kara, Erin Yamauchi, Makoto |
| contents | We present a time-averaged spectral analysis of the 2024 XRISM observation of the narrow-line Seyfert-1 galaxy MCG--6-30-15, taken contemporaneously with XMM-Newton and NuSTAR. Our analysis leverages a unique combination of broadband and high-resolution X-ray spectroscopy to definitively isolate and characterize both broad and narrow emission and absorption features in this source. The best-fitting model for the joint spectral analysis is very well described by reflection from the inner accretion disk illuminated by a compact corona, modified by multi-zone ionized absorption from an outflowing wind along the line of sight. The XRISM/Resolve data confirm that a strong, relativistically-broadened Fe K$α$ emission line is required in order to obtain an adequate model fit. The Resolve data additionally verify the presence of a $v_{\rm out} \sim 2300$ km/s component of this outflowing wind, find tentative evidence for a $v_{\rm out} \sim 20,000$ km/s wind component, and indicate that the reflection from distant, neutral material may originate in a non-uniform structure rather than the traditional torus of AGN unification schemes. Though a rapid prograde black hole spin is statistically preferred by the best-fitting model, consistent with previous results, the AGN flux variability over the course of the observation complicates the interpretation of the time-averaged spectra. This insight, clarified by the combination of high signal-to-noise and high spectral resolution in the joint dataset, emphasizes the importance of time-resolved, high-resolution spectral analysis in unambiguously measuring the physical properties of variable AGN. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_08926 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Sharper View of the X-ray Spectrum of MCG--6-30-15 with XRISM, XMM-Newton and NuSTAR Brenneman, Laura W. Wilkins, Daniel R. Ogorzałek, Anna Rogantini, Daniele Fabian, Andrew C. García, Javier A. Juráňová, Anna Mizumoto, Misaki Noda, Hirofumi Behar, Ehud Boissay-Malaquin, Rozenn Guainazzi, Matteo Okajima, Takashi Hoffman, Erika Keshet, Noa Kaastra, Jelle Kara, Erin Yamauchi, Makoto High Energy Astrophysical Phenomena Astrophysics of Galaxies We present a time-averaged spectral analysis of the 2024 XRISM observation of the narrow-line Seyfert-1 galaxy MCG--6-30-15, taken contemporaneously with XMM-Newton and NuSTAR. Our analysis leverages a unique combination of broadband and high-resolution X-ray spectroscopy to definitively isolate and characterize both broad and narrow emission and absorption features in this source. The best-fitting model for the joint spectral analysis is very well described by reflection from the inner accretion disk illuminated by a compact corona, modified by multi-zone ionized absorption from an outflowing wind along the line of sight. The XRISM/Resolve data confirm that a strong, relativistically-broadened Fe K$α$ emission line is required in order to obtain an adequate model fit. The Resolve data additionally verify the presence of a $v_{\rm out} \sim 2300$ km/s component of this outflowing wind, find tentative evidence for a $v_{\rm out} \sim 20,000$ km/s wind component, and indicate that the reflection from distant, neutral material may originate in a non-uniform structure rather than the traditional torus of AGN unification schemes. Though a rapid prograde black hole spin is statistically preferred by the best-fitting model, consistent with previous results, the AGN flux variability over the course of the observation complicates the interpretation of the time-averaged spectra. This insight, clarified by the combination of high signal-to-noise and high spectral resolution in the joint dataset, emphasizes the importance of time-resolved, high-resolution spectral analysis in unambiguously measuring the physical properties of variable AGN. |
| title | A Sharper View of the X-ray Spectrum of MCG--6-30-15 with XRISM, XMM-Newton and NuSTAR |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2510.08926 |