Publications by authors named "M Ginolfi"
Article Synopsis
- - Galaxy clusters are huge structures containing thousands of galaxies and a hot intracluster medium (ICM), which makes up much of their mass and changes over time due to matter accumulation and mergers with other clusters.
- - Previous observations of the ICM have mostly focused on older clusters, leaving a gap in understanding the ICM during the formation of the first massive clusters.
- - Recent detection of the thermal Sunyaev-Zeldovich effect in the Spiderweb protocluster shows the presence of a nascent ICM about 10 billion years ago, revealing a less intense signal than expected, indicating a younger, active cluster formation phase.
The phase transition between galaxies and quasars is often identified with the rare population of hyper-luminous, hot dust-obscured galaxies. Galaxy formation models predict these systems to grow via mergers, that can deliver large amounts of gas toward their centers, induce intense bursts of star formation and feed their supermassive black holes. Here we report the detection of 24 galaxies emitting Lyman-α emission on projected physical scales of about 400 kpc around the hyper-luminous hot dust-obscured galaxy W0410-0913, at redshift z = 3.
View Article and Find Full Text PDFUnderstanding how super-massive black holes form and grow in the early Universe has become a major challenge since it was discovered that luminous quasars existed only 700 million years after the Big Bang. Simulations indicate an evolutionary sequence of dust-reddened quasars emerging from heavily dust-obscured starbursts that then transition to unobscured luminous quasars by expelling gas and dust. Although the last phase has been identified out to a redshift of 7.
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