Publications by authors named "Rosa Valiante"
Recent observations have found a large number of supermassive black holes already in place in the first few hundred million years after the Big Bang, many of which seem to be overmassive relative to their host galaxy stellar mass when compared with local relation. Several different models have been proposed to explain these findings, ranging from heavy seeds to light seeds experiencing bursts of high accretion rate. Yet, current datasets are unable to differentiate between these various scenarios.
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- The LISA mission's science objectives were initially based on the assumption of 4 years of continuous data collection, but the expected duty cycle now suggests usable data will only be available for 3 years.
- A study by the LISA Science Group examines how extending the mission duration could enhance scientific outcomes, particularly regarding the search for seed black holes from the early universe and the investigation of stellar-origin black holes through various observational methods.
- The conclusion recommends extending the mission to 6 years to significantly improve the quality and quantity of scientific data collected.