Morphology-Dependent Black Hole Scaling Relations and Pursuit of Long-wavelength Gravitational Waves @LISAcommunity

Uploaded August 2020 | Updated September 2026, 1 hour ago

Morphology-Dependent Black Hole Scaling Relations and Pursuit of Long-wavelength Gravitational Waves

Nandini Sahu, Alister Graham,Benjamin Davis

We have performed careful, multi-component, photometric-decompositions of the largest-to-date sample of galaxies with dynamically measured (central) supermassive black hole masses. We present significantly modified correlations between the black hole mass and the host galaxy properties, such as the bulge's stellar mass, the total galaxy stellar mass, the central stellar velocity dispersion, concentration (Sérsic index), effective half-light radius, and the internal stellar mass density. The final scaling relations are dependent upon the galaxy morphology, which is fundamentally-linked with the formation and evolutionary paths of galaxies. Moreover, these new scaling relations reveal notably different black hole masses in other galaxies, and they will improve the predictions for the space-based detection of long-wavelength gravitational waves by LISA.

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