Publications by authors named "Roberto Decarli"
Distortions of the observed cosmic microwave background provide a direct measurement of the microwave background temperature at redshifts from 0 to 1 (refs. ). Some additional background temperature estimates exist at redshifts from 1.
View Article and Find Full Text PDFQuasars are the most luminous non-transient objects known and as a result they enable studies of the Universe at the earliest cosmic epochs. Despite extensive efforts, however, the quasar ULAS J1120 + 0641 at redshift z = 7.09 has remained the only one known at z > 7 for more than half a decade.
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- The Hubble Deep Field has allowed astronomers to observe thousands of galaxies over time, with one notable discovery being HDF 850.1, which emits at a wavelength sensitive to star formation.
- Researchers have now determined that HDF 850.1 has a redshift of z = 5.183, placing it in a galaxy cluster formed just 1.1 billion years after the Big Bang.
- Despite identifying its distance and mass, HDF 850.1 still lacks a visible starlight counterpart, making it a mysterious object in cosmic observations.*