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XRISM/Resolve reveals the complex iron structure of NGC 7213: Evidence for radial stratification between inner disk and broad-line region

Fuente: arXiv

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Main Authors:	Kammoun, E., Kawamuro, T., Murakami, K., Bianchi, S., Nicastro, F., Luminari, A., Aydi, E., Eracleous, M., Adegoke, O. K., Bertola, E., Boorman, P. G., Braito, V., Bruni, G., Comastri, A., Condò, P., Dadina, M., Enoto, T., García, J. A., Gianolli, V. E., Harrison, F. A., Lanzuisi, G., Laurenti, M., Marinucci, A., Mastroserio, G., Matsumoto, H., Matt, G., Matzeu, G., Middei, R., Nardini, E., Noda, H., Odaka, H., Ogawa, S., Panessa, F., Piconcelli, E., Pinto, C., Piotrowska, J. M., Ponti, G., Ricci, C., Ricci, R., Serafinelli, R., Shi, F., Stern, D., Tanimoto, A., Terashima, Y., Tomaru, R., Tombesi, F., Tortosa, A., Ueda, Y., Ursini, F., Vignali, C., Yamada, S.
Format:	Preprint
Published:	2025
Subjects:	High Energy Astrophysical Phenomena
Online Access:	Acceder al recurso
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author	Kammoun, E. Kawamuro, T. Murakami, K. Bianchi, S. Nicastro, F. Luminari, A. Aydi, E. Eracleous, M. Adegoke, O. K. Bertola, E. Boorman, P. G. Braito, V. Bruni, G. Comastri, A. Condò, P. Dadina, M. Enoto, T. García, J. A. Gianolli, V. E. Harrison, F. A. Lanzuisi, G. Laurenti, M. Marinucci, A. Mastroserio, G. Matsumoto, H. Matt, G. Matzeu, G. Middei, R. Nardini, E. Noda, H. Odaka, H. Ogawa, S. Panessa, F. Piconcelli, E. Pinto, C. Piotrowska, J. M. Ponti, G. Ricci, C. Ricci, R. Serafinelli, R. Shi, F. Stern, D. Tanimoto, A. Terashima, Y. Tomaru, R. Tombesi, F. Tortosa, A. Ueda, Y. Ursini, F. Vignali, C. Yamada, S. Yamada, S.
author_facet	Kammoun, E. Kawamuro, T. Murakami, K. Bianchi, S. Nicastro, F. Luminari, A. Aydi, E. Eracleous, M. Adegoke, O. K. Bertola, E. Boorman, P. G. Braito, V. Bruni, G. Comastri, A. Condò, P. Dadina, M. Enoto, T. García, J. A. Gianolli, V. E. Harrison, F. A. Lanzuisi, G. Laurenti, M. Marinucci, A. Mastroserio, G. Matsumoto, H. Matt, G. Matzeu, G. Middei, R. Nardini, E. Noda, H. Odaka, H. Ogawa, S. Panessa, F. Piconcelli, E. Pinto, C. Piotrowska, J. M. Ponti, G. Ricci, C. Ricci, R. Serafinelli, R. Shi, F. Stern, D. Tanimoto, A. Terashima, Y. Tomaru, R. Tombesi, F. Tortosa, A. Ueda, Y. Ursini, F. Vignali, C. Yamada, S. Yamada, S.
contents	We present the first high-resolution X-ray spectrum of NGC 7213 obtained with XRISM/Resolve, supported by simultaneous XMM-Newton, NuSTAR, and SOAR optical data. The XRISM spectrum resolves the neutral Fe\,K$α$ into two components: a narrow core ($\rm FWHM = 650_{-220}^{+240}\,\rm km\,s^{-1}$) consistent with emission at the dust sublimation radius, and a broader, asymmetric line best described by disk-like emission from $\sim 100\,\rm R_{g}$. This disk component mirrors the profile of the double-peaked H$α$ line observed in the optical. In addition, we detect broadened Fe XXV and Fe XXVI emission lines whose inferred locations bridge the gap between the inner disk and the optical broad-line region. The weak narrow Fe K$α$ equivalent width ($\rm EW = 32 \pm 6\,eV$) and absence of a Compton hump imply a low-covering-fraction, Compton-thin torus. Together, these results reveal a radially stratified structure in NGC 7213, spanning nearly four orders of magnitude in radius, and place the source in an intermediate accretion state ($\rm λ_{Edd} = 0.001-0.01$) where the inner disk and BLR remain, while the torus shows signs of dissipation.
format	Preprint
id	arxiv_https___arxiv_org_abs_2510_24971
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	XRISM/Resolve reveals the complex iron structure of NGC 7213: Evidence for radial stratification between inner disk and broad-line region Kammoun, E. Kawamuro, T. Murakami, K. Bianchi, S. Nicastro, F. Luminari, A. Aydi, E. Eracleous, M. Adegoke, O. K. Bertola, E. Boorman, P. G. Braito, V. Bruni, G. Comastri, A. Condò, P. Dadina, M. Enoto, T. García, J. A. Gianolli, V. E. Harrison, F. A. Lanzuisi, G. Laurenti, M. Marinucci, A. Mastroserio, G. Matsumoto, H. Matt, G. Matzeu, G. Middei, R. Nardini, E. Noda, H. Odaka, H. Ogawa, S. Panessa, F. Piconcelli, E. Pinto, C. Piotrowska, J. M. Ponti, G. Ricci, C. Ricci, R. Serafinelli, R. Shi, F. Stern, D. Tanimoto, A. Terashima, Y. Tomaru, R. Tombesi, F. Tortosa, A. Ueda, Y. Ursini, F. Vignali, C. Yamada, S. Yamada, S. High Energy Astrophysical Phenomena We present the first high-resolution X-ray spectrum of NGC 7213 obtained with XRISM/Resolve, supported by simultaneous XMM-Newton, NuSTAR, and SOAR optical data. The XRISM spectrum resolves the neutral Fe\,K$α$ into two components: a narrow core ($\rm FWHM = 650_{-220}^{+240}\,\rm km\,s^{-1}$) consistent with emission at the dust sublimation radius, and a broader, asymmetric line best described by disk-like emission from $\sim 100\,\rm R_{g}$. This disk component mirrors the profile of the double-peaked H$α$ line observed in the optical. In addition, we detect broadened Fe XXV and Fe XXVI emission lines whose inferred locations bridge the gap between the inner disk and the optical broad-line region. The weak narrow Fe K$α$ equivalent width ($\rm EW = 32 \pm 6\,eV$) and absence of a Compton hump imply a low-covering-fraction, Compton-thin torus. Together, these results reveal a radially stratified structure in NGC 7213, spanning nearly four orders of magnitude in radius, and place the source in an intermediate accretion state ($\rm λ_{Edd} = 0.001-0.01$) where the inner disk and BLR remain, while the torus shows signs of dissipation.
title	XRISM/Resolve reveals the complex iron structure of NGC 7213: Evidence for radial stratification between inner disk and broad-line region
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2510.24971