All articles tagged with #galaxy growth
Astronomers using the ASKAP telescope discovered 15 new Giant Radio Galaxies, some over 12 million light-years wide, which are the largest single objects in the universe. These galaxies feature supermassive black holes that emit powerful jets, creating vast radio lobes, and their study helps understand galaxy growth and black hole activity cycles.
Astronomers using the MUSE instrument on the ESO's Very Large Telescope have discovered that galactic winds, which limit galaxy growth and star formation, are a universal phenomenon in galaxies over 7 billion years old. These winds, formed from massive star explosions, were mapped using magnesium atom emission signals. Future studies aim to measure the extent and matter content of these galactic winds.
A survey conducted with the James Webb Space Telescope (JWST) has revealed that active galactic nuclei (AGN), which are rapidly growing supermassive black holes, are rarer than previously assumed. The survey focused on a region of the cosmos known as the Extended Groth Strip and found fewer AGN than expected, suggesting that the universe may be more stable than thought. The study also provided insights into faint galaxies and their properties, as well as the challenges in identifying AGN. The findings prompt questions about the growth and impact of supermassive black holes on their host galaxies, including the Milky Way.
Astronomers have used the Atacama Large Millimeter/submillimeter Array (ALMA) telescope to draw a temperature map of the dust within one of the oldest spiral galaxies in the universe, revealing two distinct heat sources: a supermassive black hole at the center of the galaxy and the heat generated by newly-formed stars in the surrounding rotating disk. The research provides new insights into how fast the galaxy is growing and a clearer picture of how galaxies and central massive black holes form and grow in the early universe.