2023-12-05 カーディフ大学
◆研究結果は銀河の進化に新たな情報を提供し、ブラックホールの質量推定にも新たな手法を提示しています。銀河内のブラックホールは小さいが、その影響は銀河全体に及び、これに関する謎に研究者が挑戦しています。
＜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 (Lν, mm), the intrinsic 2–10 keV X-ray luminosity (LX, 2–10) and the supermassive black hole (SMBH) mass (MBH) with an intrinsic scatter (σint) 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 MBH correlates with Lν, mm at a highly significant level, although such correlation is less tight than the mm fundamental plane (σint = 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.
