355 citations · 1.6k across the 42 of their papers we have counts for
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Capture of stars into gaseous discs around massive black holes: Alignment, circularization and growth
Aleksey Generozov, Hagai B. Perets
The majority of massive black holes (MBHs) likely hosted gas discs during their lifetimes. These could either be long-lived active galactic nuclei (AGN) discs, or shorter-lived dis…
Binary formation through gas-assisted capture and the implications for stellar, planetary and compact-object evolution
Mor Rozner, Aleksey Generozov, Hagai B. Perets
Binary systems are ubiquitous and their formation requires two-body interaction and dissipation. In gaseous media, interactions between two initially unbound objects could result i…
Resonant Dynamical Friction Around a Super-Massive Black Hole: Analytical Description
Yonadav Barry Ginat, Taras Panamarev, Bence Kocsis +1
We derive an analytical model for the so-called phenomenon of `resonant dynamical friction', where a disc of stars around a super-massive black hole interacts with a massive pertur…
Using Ti Emission to Differentiate Between Thermonuclear Supernova Progenitors
Daniel Kosakowski, Mark Ivan Ugalino, Robert Fisher +3
The radiosotope Ti is produced through -rich freezeout and explosive helium burning in type Ia supernovae (SNe Ia). In this paper, we discuss how the detection of …
Hyper-runaway and hypervelocity white dwarf candidates in \textit{Gaia} Data Release 3: possible remnants from Ia/Iax supernova explosions or dynamical encounters
Andrei P. Igoshev, Hagai Perets, Na'ama Hallakoun
Type Ia and other peculiar supernovae (SNe) are thought to originate from the thermonuclear explosions of white dwarfs (WDs). Some of the proposed channels involve the ejection of…
The origins of Calcium-rich supernovae from disruptions of CO white-dwarfs by hybrid He-CO white-dwarfs
Yossef Zenati, Hagai B. Perets, Luc Dessart +3
Calcium-rich (SN 2005E-like) explosions are very faint (typical -15.5, type I supernovae (SNe) showing strong Ca-lines, mostly observed in old stellar environments. Several models…
The Late-Time Light Curves of Type Ia Supernovae: Confronting Models with Observations
Vishal Tiwari, Or Graur, Robert Fisher +5
Type Ia supernovae (SNe Ia) play a crucial role as standardizable candles in measurements of the Hubble constant and dark energy. Increasing evidence points towards multiple possib…
Are there any pristine comets? Constraints from pebble structure
Uri Malamud, Wolf A. Landeck, Dorothea Bischoff +4
We show that if comets (or any small icy planetesimals such as Kuiper belt objects) are composed of pebble piles, their internal radiogenic as well as geochemical heating results i…
Analytic Modelling of Binary-Single Encounters: Non-Thermal Eccentricity Distribution and Gravitational-Wave Source Formation
Yonadav Barry Ginat, Hagai Perets
Chaotic three-body interactions may lead to the formation of gravitational-wave sources. Here, by modelling the encounter as a series of close, non-hierarchical, triple approaches,…
Detailed properties of gravitational-wave mergers from flyby perturbations of wide binary black holes in the field
Yael Raveh, Erez Michaely, Hagai Binyamin Perets
Wide black hole binaries (wide-BBHs; AU) in the field can be perturbed by random stellar flybys that excite their eccentricities. Once a wide binary is driven to a…
3D Hydrodynamical Simulations of Helium-Ignited Double-degenerate White Dwarf Mergers
Niranjan Roy, Vishal Tiwari, Alexey Bobrick +6
The origins of type Ia supernovae (SNe Ia) are still debated. Some of the leading scenarios involve a double detonation in double white dwarf (WD) systems. In these scenarios, heli…
The Circumstellar Environments of Double-Peaked, Calcium-strong Supernovae 2021gno and 2021inl
Wynn Jacobson-Galán, Padma Venkatraman, Raffaella Margutti +42
We present panchromatic observations and modeling of calcium-strong supernovae (SNe) 2021gno in the star-forming host galaxy NGC 4165 (D = 30.5 Mpc) and 2021inl in the outskirts of…
Binary evolution, gravitational-wave mergers and explosive transients in multiple-populations gas-enriched globular-clusters
Mor Rozner, Hagai B. Perets
Most globular clusters (GCs) show evidence for multiple stellar populations, suggesting the occurrence of several distinct star-formation episodes. The large fraction of second pop…
Compact objects formation, retention, and growth through accretion onto gas-embedded white-dwarfs/neutron-stars in gas-enriched globular-clusters
Hagai B. Perets
Observations of pulsars in globular clusters (GCs) give evidence that more >10-20% of neutron stars (NSs) ever formed in GCs were retained there. However, the velocity distribution…