355 citations · 1.6k across the 42 of their papers we have counts for
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S301 and friends: Measuring the spin of Sgr A*
T. Piran, P. Amaro-Seoane, B. Aytac +15
The discovery of S301 (GRAVITY Collaboration et al., 2026) with pericenter distance rp= 280rg and eccentricity e=0.9825, opens the prospect of measuring the spin parameter of Sgr A…
Discovery of a star sensitive to the spin of Sgr A*
K. Abd El Dayem, R. Abuter, N. Aimar +85
Residing in the center of the Milky Way, Sgr A* is the closest massive black hole (MBH). Its vicinity has allowed measuring individual stellar orbits around it. The stars act as te…
Gas in Globular Clusters I: Gas Retention and Its Possible Consequences
Alexey Bobrick, Melvyn B. Davies, Hagai B. Perets
Globular clusters host complex stellar populations whose chemical signatures suggest early (3 Myr - 1 Gyr) retention and reprocessing of stellar ejecta, yet direct evidence for int…
The S stars' zone of avoidance in the Galactic center
Aleksey Generozov, Hagai B. Perets, Matteo S. Bordoni +9
This paper investigates the origin and orbital evolution of S stars in the Galactic center using models of binary disruption and relaxation processes. We focus on explaining the re…
Three-Body Binary Formation in Clusters: Analytical Theory
Yonadav Barry Ginat, Hagai B. Perets
Binary formation in clusters through triple encounters between three unbound stars, 'three-body' binary formation, is one of the main dynamical formation processes of binary system…
Born to be wide: the distribution of wide binaries in the field and soft binaries in clusters
Mor Rozner, Hagai B. Perets
Most stars, binaries, and higher multiplicity systems are thought to form in stellar clusters and associations, which later dissociate. Very wide binaries can be easily disrupted i…
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…
Constraints on the origins of hypervelocity stars: velocity distribution, mergers and star-formation history
Aleksey Generozov, Hagai B. Perets
In recent years surveys have identified several dozen B stars in the Milky Way halo moving faster than the local escape speed. The origin of most of these hypervelocity stars (HVSs…
Intermediate mass black holes in AGN disks: I. Production & Growth
B. McKernan, K. E. S. Ford, W. Lyra +1
Here we propose a mechanism for efficiently growing intermediate mass black holes (IMBH) in disks around supermassive black holes. Stellar mass objects can efficiently agglomerate…