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NASA Goddard Space Flight CenterAnna Trindade FalcãoMultiwavelength astrophysicist · Black-hole winds · AGN feedback
Three-panel processed Chandra/ACIS-S image of NGC 5005 showing 0.3–7 keV full-band, 0.3–3 keV soft-band, and 3–7 keV hard-band emission, binned to one-eighth of the native ACIS pixel scale and smoothed with a three-image-pixel Gaussian kernel for display. The soft emission is visibly more extended than the hard emission; marked nonnuclear point sources were excluded from analysis. Each panel has a 500 pc scale bar, north is up, east is left, and color bars give counts. Display smoothing enhances morphology but is not an independent resolution measurement.
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Research article · 2025

The X-Ray Emission of NGC 5005: An Unobscured Low-luminosity Active Galactic Nucleus with a Weakly Accreting Broad-line Region

ApJ 993, 247 (2025)

Paper-derived processed observational figure · Published Figure 1

Published-paper Figure 1. Merged Chandra/ACIS-S images of NGC 5005 in the 0.3–7 keV full band, 0.3–3 keV soft band, and 3–7 keV hard band, binned to one-eighth of the native ACIS pixel scale and smoothed with a three-image-pixel Gaussian kernel for display. Marked nonnuclear point sources were excluded from the spatial and spectral analyses. Each panel includes a 500 pc scale bar; north is up, east is left, and color bars show counts. Display smoothing enhances morphology but is not an independent resolution measurement.

Trindade Falcão et al. 2025, “The X-Ray Emission of NGC 5005: An Unobscured Low-luminosity Active Galactic Nucleus with a Weakly Accreting Broad-line Region,” ApJ 993, 247, DOI: 10.3847/1538-4357/ae07d0, CC BY 4.0. Figure 1 rasterized, proportionally resized, and converted to WebP for web presentation. Chandra: NASA/CXC.

Research summary

Extended X-ray emission around a weakly accreting nucleus

Merged Chandra/ACIS-S images show X-ray emission extending beyond the observation-specific combined CHART/MARX point-spread functions, with softer emission reaching larger projected radii than harder emission. Spectral models of the nuclear and extended regions combine photoionized and thermal components, while NuSTAR and Swift constrain the broadband nuclear spectrum; the intrinsic and bolometric luminosities, Eddington ratio, and accretion rate are derived quantities. These results support the interpretation of an intrinsically low-luminosity, comparatively unobscured nucleus and a possible surviving broad-line region or thin disk. A shocked-gas contribution to the extended thermal emission is plausible, but stellar processes remain possible. The paper does not establish multiple nuclei, spatially resolved Fe-line morphology, a resolved outflow velocity field, or causal feedback.