ブラックホールの朝食の余韻を解釈する(Interpreting the afterglow of a black hole’s breakfast)

2023-12-05 カーディフ大学

＜関連情報＞

• https://www.cardiff.ac.uk/news/view/2782156-interpreting-the-afterglow-of-a-black-holes-breakfast
• https://academic.oup.com/mnrasl/article/528/1/L76/7455681

ミリメートル波長におけるブラックホール降着の基本面 A fundamental plane of black hole accretion at millimetre wavelengths

Ilaria Ruffa, Timothy A Davis, Jacob S Elford, Martin Bureau, Michele Cappellari, Jindra Gensior, Daryl Haggard, Satoru Iguchi, Federico Lelli, Fu-Heng Liang,Lijie Liu, Marc Sarzi, Thomas G Williams, Hengyue Zhang
Monthly Notices of the Royal Astronomical Society: Letters  Published::05 December 2023
DOI:https://doi.org/10.1093/mnrasl/slad167

ABSTRACT

We report the discovery of the ‘mm fundamental plane of black hole accretion’, which is a tight correlation between the nuclear 1 mm luminosity (L_{ν, mm}), the intrinsic 2–10 keV X-ray luminosity (L_{X, 2–10}) and the supermassive black hole (SMBH) mass (M_BH) with an intrinsic scatter (σ_int) of 0.40 dex. The plane is found for a sample of 48 nearby galaxies, most of which are low-luminosity active galactic nuclei. Combining these sources with a sample of high-luminosity (quasar-like) nearby AGN, we show that the plane still holds. We also find that M_BH correlates with L_{ν, mm} at a highly significant level, although such correlation is less tight than the mm fundamental plane (σ_int = 0.51 dex). Crucially, we show that spectral energy distribution (SED) models for both advection-dominated accretion flows (ADAFs) and compact jets can explain the existence of these relations, which are not reproduced by the standard torus-thin accretion disc models usually associated to quasar-like AGN. The ADAF models reproduces the observed relations somewhat better than those for compact jets, although neither provides a perfect fit. Our findings thus suggest that radiatively inefficient accretion processes such as those in ADAFs or compact (and thus possibly young) jets may play a key role in both low- and high-luminosity AGN. This mm fundamental plane also offers a new, rapid method to (indirectly) estimate SMBH masses.