The dynamic central environment of NGC 3516 revealed by XRISM
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| Autores principales: | , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| author | Juráňová, Anna Kara, Erin Behar, Ehud Costantini, Elisa Miller, Jon M. Rogantini, Daniele Reeves, James N. Braito, Valentina Ebrero, Jacobo Gallo, Luigi Keshet, Noa Kriss, Gerard A. Mehdipour, Missagh Noda, Hirofumi Tanimoto, Atsushi Tombesi, Francesco Turner, Tracey J. Yamada, Satoshi |
| author_facet | Juráňová, Anna Kara, Erin Behar, Ehud Costantini, Elisa Miller, Jon M. Rogantini, Daniele Reeves, James N. Braito, Valentina Ebrero, Jacobo Gallo, Luigi Keshet, Noa Kriss, Gerard A. Mehdipour, Missagh Noda, Hirofumi Tanimoto, Atsushi Tombesi, Francesco Turner, Tracey J. Yamada, Satoshi |
| contents | We present a detailed, time-resolved analysis of the Fe K band of the Seyfert 1.5 galaxy NGC 3516 observed with XRISM. The 249 ks observation spanning $\sim$310 ks in elapsed time reveals an exceptionally rich and time-variable absorption spectrum. Six distinct absorption components are detected across multiple ionization states, spanning more than an order of magnitude in ionization parameter and a wide range of systemic velocities, from a potential inflow ($+4300~\rm km~s^{-1}$) to a mildly relativistic ultra-fast outflow ($-9800~\rm km~s^{-1}$). Despite their diversity, the components exhibit relatively small broadening ($\lesssim$$400~\rm km~s^{-1}$), implying comparable internal dynamics within a medium of a complex structure. Time-resolved spectroscopy reveals pronounced variability in three highly ionized absorbers, with Fe XXV$-$Fe XXVI features that appear and disappear on timescales of tens of kiloseconds. This behavior likely reflects a combination of geometrical transits of clumpy gas and ionization-state changes driven by continuum variability. An additional temporary absorption feature in the red wing of the Fe K$α$ line, consistent with Fe XXV absorption, indicates a possible transient ultra-fast inflow at $\sim$$15\,000~\rm km~s^{-1}$ ($\sim$5% $c$). Finally, the continuum light curve exhibits a tentative $\sim$40 ks oscillatory pattern, accompanied by correlated shifts of a weak, narrow Fe K$α$ emission feature, suggesting dynamic coupling between the continuum and the line-emitting region. Together, these results reveal that the nuclear environment of NGC 3516 is dominated by rapidly evolving, multi-phase gas flows, where accretion, ejection, and ionization processes are tightly coupled on sub-parsec scales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_07950 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The dynamic central environment of NGC 3516 revealed by XRISM Juráňová, Anna Kara, Erin Behar, Ehud Costantini, Elisa Miller, Jon M. Rogantini, Daniele Reeves, James N. Braito, Valentina Ebrero, Jacobo Gallo, Luigi Keshet, Noa Kriss, Gerard A. Mehdipour, Missagh Noda, Hirofumi Tanimoto, Atsushi Tombesi, Francesco Turner, Tracey J. Yamada, Satoshi Astrophysics of Galaxies We present a detailed, time-resolved analysis of the Fe K band of the Seyfert 1.5 galaxy NGC 3516 observed with XRISM. The 249 ks observation spanning $\sim$310 ks in elapsed time reveals an exceptionally rich and time-variable absorption spectrum. Six distinct absorption components are detected across multiple ionization states, spanning more than an order of magnitude in ionization parameter and a wide range of systemic velocities, from a potential inflow ($+4300~\rm km~s^{-1}$) to a mildly relativistic ultra-fast outflow ($-9800~\rm km~s^{-1}$). Despite their diversity, the components exhibit relatively small broadening ($\lesssim$$400~\rm km~s^{-1}$), implying comparable internal dynamics within a medium of a complex structure. Time-resolved spectroscopy reveals pronounced variability in three highly ionized absorbers, with Fe XXV$-$Fe XXVI features that appear and disappear on timescales of tens of kiloseconds. This behavior likely reflects a combination of geometrical transits of clumpy gas and ionization-state changes driven by continuum variability. An additional temporary absorption feature in the red wing of the Fe K$α$ line, consistent with Fe XXV absorption, indicates a possible transient ultra-fast inflow at $\sim$$15\,000~\rm km~s^{-1}$ ($\sim$5% $c$). Finally, the continuum light curve exhibits a tentative $\sim$40 ks oscillatory pattern, accompanied by correlated shifts of a weak, narrow Fe K$α$ emission feature, suggesting dynamic coupling between the continuum and the line-emitting region. Together, these results reveal that the nuclear environment of NGC 3516 is dominated by rapidly evolving, multi-phase gas flows, where accretion, ejection, and ionization processes are tightly coupled on sub-parsec scales. |
| title | The dynamic central environment of NGC 3516 revealed by XRISM |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2512.07950 |