2026-01-08 カリフォルニア大学アーバイン校（UCI）
This artist’s rendering illustrates a precessing jet erupting from the supermassive black hole at the center of galaxy VV 340a. Optical observations from the W. M. Keck Observatory revealed extended, cooler gas pushed outward over thousands of light-years, while infrared data from NASA’s James Webb Space Telescope captured the super-heated coronal gas near the galaxy’s core. W. M. Keck Observatory / Adam Makarenko
＜関連情報＞
- https://news.uci.edu/2026/01/08/uc-irvine-astronomers-spot-largest-known-stream-of-super-heated-gas-in-the-universe/
- https://www.science.org/doi/10.1126/science.adp8989
活動銀河核からの歳差運動するジェットが円盤銀河からのガス流出を引き起こす A precessing jet from an active galactic nucleus drives gas outflow from a disk galaxy
Justin A. Kader, Vivian U, Loreto Barcos-Muñoz, Marina Bianchin, […] , and Jason Surace
Science Published:8 Jan 2026
DOI:https://doi.org/10.1126/science.adp8989
Abstract
To reproduce observed galaxy properties, cosmological simulations require that massive galaxies experience feedback from active galactic nuclei, which regulates star formation within those galaxies. However, the energetics and timescales of these feedback processes are poorly constrained. We combine optical, infrared, sub-millimeter and radio observations of the active galaxy VV 340a, hosting a low-power jet launched from a supermassive black hole at its center. We find that the jet undergoes precession, with a period of (8.2 ± 5.5) × 105 years, and drives an outflow of gas at a rate of 19.4 ± 7.9 solar masses per year. The jet shocks the gas, producing highly ionized plasma extending several kiloparsecs from the nucleus. The outflow ejects sufficient gas from the galaxy to influence its star formation rate.
