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Where to search for supermassive binary black holes

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arxiv 2502.12664 v1 pith:2XNQ7WU4 submitted 2025-02-18 astro-ph.GA astro-ph.COastro-ph.HE

Where to search for supermassive binary black holes

classification astro-ph.GA astro-ph.COastro-ph.HE
keywords binarysmbbhsblackgalaxyholesobservationalrolespectroscopic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Supermassive binary black holes (SMBBHs) are the anticipated byproducts of galaxy mergers and play a pivotal role in shaping galaxy evolution, gravitational wave emissions, and accretion physics. Despite their theoretical prevalence, direct observational evidence for SMBBHs remains elusive, with only a handful of candidates identified to date. This paper explores optimal strategies and key environments for locating SMBBHs, focusing on observational signatures in the broad Balmer lines. We present a preliminary analysis on a flux-limited sample of sources belonging to an evolved spectral type along the quasar main sequence, and we discuss the spectroscopic clues indicative of binary activity and highlight the critical role of time-domain spectroscopic surveys in uncovering periodic variability linked to binary systems.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Progenitor of the recoiling super-massive black hole RBH-1 identified using HST/JWST imaging

    astro-ph.HE 2026-01 conditional novelty 4.0

    The 954 km/s runaway speed of RBH-1 implies its progenitor was a precessing, nearly equal-mass binary with a rapidly spinning primary black hole.