text: 131,14,1111739025696657411,2427184074,Christopher Berry,"New on @arxiv this week, our #Astro2020 white paper on observing binary black holes with next-generation #GravitationalWave detectors Deeper, wider, sharper: Next-generation ground-based gravitational-wave observations of binary black holes <LINK> <LINK> We ask what is required of a detector to 🔭 Detect binary black holes throughout the observable universe? ⚖️ Precisely measure their masses, spins, etc. and how these distributions evolve? 🌱Uncover the seeds of the massive black holes found in galactic centres? #Astro2020 Current detectors like @LIGO can do great things, but we're limited in how far away we can detect sources. More sensitive detectors = deeper survey of the Universe. We'd like to survey back before the peak in star formation (z ~ 2) to the end of the cosmological dark ages z ~ 20 How far could we see a binary black hole system with a future detector? The white solid line shows horizon with Cosmic Explore, the white dashed with the Einstein telescope. The colour coding is for a boost β relative to @LIGO A+, and the blue line is for β =10 #Astro2020 <LINK> If we increase the frequency range of our detectors we can detect more systems. Wider frequency range = wider range of sources. Lower frequency sensitivities lets us detect higher mass systems. A 100+100 solar mass binary at z = 10 is unobservable above 10 Hz #Astro2020 <LINK> We want to detect heavier systems as these might tell us where supermassive black holes come from. This plot shows the low frequency sensitivity we need to detect a 100+100 solar mass system at z = 10 if we parametrize the PSD as S = S10 (f/10 Hz)^α down to a cut-off f = fmin <LINK> Improved detector sensitivity + wider frequency bandwidth = sharper parameter measurements. With next-gen #GravitationalWave detectors, we would precisely pin down the mass and spin distributions of black holes, which are clues to how they form <LINK> #Astro2020 Next-gen #GravitationalWave detectors will let us measure how mass and spin distributions evolve through cosmic time. We need lots of detections to do this. This plot shows detections per year for different redshift bins—they max out when we detect ALL of them #Astro2020 <LINK>",https://arxiv.org/abs/1903.09220,"Next-generation observations will revolutionize our understanding of binary black holes and will detect new sources, such as intermediate-mass black holes. Primary science goals include: Discover binary black holes throughout the observable Universe; Reveal the fundamental properties of black holes; Uncover the seeds of supermassive black holes. ","Deeper, Wider, Sharper: Next-Generation Ground-Based Gravitational-Wave