The team leveraged VERA’s ultra-wideband recording capability, which enable them to detect faint, polarised radio waves coming from the core of these galaxies with unprecedented precision. To do so, they used VERA, a radio telescope network with an eyesight over 100,000 times more powerful than the human eye. To gain a deeper understanding of the immediate surroundings of these peculiar growing black holes, the team observed the cores of six nearby active NLS1 galaxies. “This renders NSL1 galaxies a unique laboratory to study the physics of rapidly evolving supermassive black holes.” “These characteristics suggest that these galaxies have smaller masses of the central black hole and higher accretion rates than those of other classes of AGNs such as quasars, BL Lacertae objects (BLOs), and radio galaxies. In their paper, the team stated: “NSL1 galaxies exhibit strong X-ray variability with substantial excess in soft X-rays and relatively high luminosity. They are suspected to contain relatively small but rapidly growing black holes, which offers a potential opportunity to study the evolutionary stage of these cosmic phenomena. Analysing the evolutionary stage of growing black holesįor the study, the team focused on a distinct category of active galaxies, known as Narrow-line Seyfert 1 (NLS1) galaxies. ![]() The research, ‘ Probing the Heart of Active Narrow-line Seyfert 1 Galaxies with VERA Wideband Polarimetry,’ was detailed in a paper in The Astrophysical Journal. ![]() ![]() However, the growth history by which these black holes have gained such huge masses remains an open question. It is now widely accepted among astronomers that nearly every active galaxy harbours a supermassive black hole at its core, with masses ranging from millions to billions of times that of the Sun. To uncover the truth about growing black holes, the team used the state-of-the-art capability of VERA, a Japanese network of radio telescopes operated by NAOJ. An international team of astronomers has uncovered valuable clues about how rapidly growing black holes form, grow, and possibly evolve into more powerful quasars.
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