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Mass-gap Mergers in Active Galactic Nuclei
Hiromichi Tagawa, Bence Kocsis, Zoltan Haiman +3
The recently discovered gravitational wave sources GW190521 and GW190814 have shown evidence of BH mergers with masses and spins that could be outside of the range expected from is…
Getting Ready for LISA: The Data, Support and Preparation Needed to Maximize US Participation in Space-Based Gravitational Wave Science
Kelly Holley-Bockelmann, :, Jillian Bellovary +20
The NASA LISA Study Team was tasked to study how NASA might support US scientists to participate and maximize the science return from the Laser Interferometer Space Antenna (LISA)…
Formation of GW190521 via gas accretion onto Population III stellar black hole remnants born in high-redshift minihalos
Mohammadtaher Safarzadeh, Zoltán Haiman
The recent gravitational wave merger event, GW190521, has challenged our understanding of the stellar-mass black hole (BH) formation. The primary and secondary BH are both inferred…
Radiative feedback for supermassive star formation in a massive cloud with H2 molecules in an atomic-cooling halo
Yuya Sakurai, Zoltán Haiman, Kohei Inayoshi
Recent three-dimensional cosmological simulations of protogalaxy formation have suggested that supermassive stars (SMSs) can form in gas clouds in which H cooling is suppressed…
Eccentric Black Hole Mergers in Active Galactic Nuclei
Hiromichi Tagawa, Bence Kocsis, Zoltan Haiman +3
The astrophysical origin of gravitational wave (GW) transients is a timely open question in the wake of discoveries by LIGO/Virgo. In active galactic nuclei (AGNs), binaries form a…
AGN as Potential Factories for Eccentric Black Hole Mergers
J. Samsing, I. Bartos, D. J. D'Orazio +6
There is some weak evidence that the black hole merger named GW190521 had a non-zero eccentricity. In addition, the component black holes' masses exceeded the limit predicted by st…