An international team of astronomers has identified 77 previously unknown strongly red quasars, hidden by dense cosmic dust despite being among the brightest sources in the universe. The discovery, led by Matthew Stepney from Centro from Excelência into Astrofísica and Tecnologias Relacionadas into Chile, more than doubled the known population of these rare objects. The findings open a window to study growth stages of supermassive black holes that remained invisible to conventional instruments.
Quasars are powered by supermassive black holes at the centers of galaxies. Quando matter falls inward, enormous amounts of energy are released, making these objects visible at vast cosmic distances. Dust, however, obscures part of this radiation and makes it difficult to detect entire populations, the researchers explain.
Cosmic Poeira blocks signals for billions of years
Oculto Behind the cosmic dust for billions of years, this mysterious group of quasars has finally emerged thanks to new observation techniques. Astronomers used infrared measurements and spectrophotometric observations from NASA’s SPHEREx to penetrate the intervening dust barrier. The technology makes it possible to detect radiation that conventional optical instruments cannot capture. Esse breakthrough reveals entire populations of objects that remained completely invisible in previous surveys.
Quasares with strong redness reveals hidden phase of growth
The newly identified objects belong to a category called strongly reddish quasars, acronym HRQs in English. Sua light is strongly altered by the intervening dust, shifting the radiation to infrared wavelengths. Estudá allows astronomers to examine stages of black hole activity that are not readily visible in more common quasar populations.
- Strongly reddish Quasaress (HRQs) have light altered by dense dust
- Comprimentos Infrared Wave Reveals Invisible Objects in Optical Spectrum
- Representam rare growth stages of supermassive black holes
- Detectados via SPHEREx spectrophotometric observations
- Previous População was less than 40 known objects
Pesquisa increases population by more than 100%
According to a study available on arXiv, the team discovered 77 new quasars obscured by dust, doubling the number previously identified in scientific literature. Essa sample expansion is critical for understanding the evolution of black holes over cosmic time. The researchers emphasize that this population represents just the tip of the iceberg, and many more HRQs may be awaiting detection in existing data from other space missions.
Implicações for Understanding Black Holes
The discovery offers unprecedented insight into how supermassive black holes grow in obscured environments. Muitos actively growing black holes become shrouded in dust that blocks visible light, but infrared radiation can escape. Esses strongly reddish quasars represent a population that has been neglected in previous surveys due to technological limitations. SPHEREx data has allowed astronomers to overcome these observational barriers and access a completely new regime of astrophysical phenomena.