56 citations · 407 across the 48 of their papers we have counts for
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Little Red Dots as self-gravitating discs accreting on supermassive stars: Spectral appearance and formation pathway of the progenitors to direct collapse black holes
Lorenz Zwick, Christopher Tiede, Lucio Mayer
We propose an alternative physical interpretation and formation pathway for the recently discovered "little red dots" (LRDs). We model LRDs as super-massive stars (SMSs) surrounded…
Gravitational Wave Astronomy With TianQin
En-Kun Li, Shuai Liu, Alejandro Torres-Orjuela +50
The opening of the gravitational wave window has significantly enhanced our capacity to explore the universe's most extreme and dynamic sector. In the mHz frequency range, a divers…
Close Encounters of Wide Binaries Induced by the Galactic Tide: Implications for Stellar Mergers and Gravitational-Wave Sources
Jakob Stegmann, Alejandro Vigna-Gómez, Antti Rantala +6
A substantial fraction of stars can be found in wide binaries with projected separations between and . In the standard lore of binary physics, these would…
Direct formation of massive black holes via dynamical collapse in metal-enriched merging galaxies at : fully cosmological simulations
Lucio Mayer, Pedro R. Capelo, Lorenz Zwick +1
We present the results of the first fully cosmological hydrodynamical simulations studying the merger-driven model for massive black hole (BH) seed formation via direct collapse. U…
Direct collapse of exceptionally heavy black holes in the merger-driven scenario
Lorenz Zwick, Lucio Mayer, Lionel Haemmerlé +1
We revisit the conditions present in supermassive discs (SMDs) formed by the merger of gas-rich, metal-enriched galaxies at red-shift . We find that SMDs naturally form h…
The imprint of gas on gravitational waves from LISA intermediate-mass black hole binaries
Mudit Garg, Andrea Derdzinski, Lorenz Zwick +2
We study the effect of torques on circular inspirals of intermediate-mass black hole binaries (IMBHBs) embedded in gas discs, wherein both BH masses are in the range -$10^5~\…
Revised event rates for extreme and extremely large mass-ratio inspirals
Verónica Vázquez-Aceves, Lorenz Zwick, Elisa Bortolas +4
One of the main targets of the Laser Interferometer Space Antenna (LISA) is the detection of extreme mass-ratio inspirals (EMRIs) and extremely large mass-ratio inspirals (X-MRIs).…
Improved gravitational radiation time-scales II: spin-orbit contributions and environmental perturbations
Lorenz Zwick, Pedro R. Capelo, Elisa Bortolas +3
Peters' formula is an analytical estimate of the time-scale of gravitational wave (GW)-induced coalescence of binary systems. It is used in countless applications, where the conven…
Improved gravitational radiation time-scales: significance for LISA and LIGO-Virgo sources
Lorenz Zwick, Pedro R. Capelo, Elisa Bortolas +2
We present a revised version of Peters' (1964) time-scale for the gravitational-wave (GW) induced decay of two point masses. The new formula includes the effects of the first-order…