113 citations · 587 across the 23 of their papers we have counts for
12 papers · 1 filter
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…
Impact of a granular mass distribution on the orbit of S2 in the Galactic center
Matteo Sadun Bordoni, Roberto Capuzzo Dolcetta, Aleksey Generozov +10
The orbit of the S2 star around Sagittarius A* provides a unique opportunity to test general relativity and study dynamical processes near a supermassive black hole. Observations h…
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…
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…
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…
Forming Young and Hypervelocity Stars in the Galactic Centre via Tidal Disruption of a Molecular Cloud
A. Generozov, S. Nayakshin, A. M. Madigan
The Milky Way Galaxy hosts a four million solar mass black hole, Sgr A*, that underwent a major accretion episode approximately 3-6 Myr ago. During the episode, hundreds of young m…
Galactic merger implications for eccentric nuclear disks: a mechanism for disk alignment
Alexander Rodriguez, Aleksey Generozov, Ann-Marie Madigan
The nucleus of our nearest, large galactic neighbor, M31, contains an eccentric nuclear disk--a disk of stars on eccentric, apsidally-aligned orbits around a supermassive black hol…
A stream of hypervelocity stars from the Galactic Center
Aleksey Generozov
Recent observations have found a 1700 km/s star [S5-HVS1] that was ejected from the Galactic Center approximately five million years ago. This star was likely produced by tidal dis…
The Hills Mechanism and the Galactic Center S-stars
Aleksey Generozov, Ann-Marie Madigan
Our Galactic center contains young stars, including the few million year old clockwise disk between 0.05 and 0.5 pc from the Galactic center, and the S-star cluster of B-type stars…
Mass Segregation in Eccentric Nuclear Disks: Enhanced Tidal Disruption Event Rates for High Mass Stars
Hayden R. Foote, Aleksey Generozov, Ann-Marie Madigan
Eccentric nuclear disks (ENDs) are a type of star cluster in which the stars lie on eccentric, apsidally-aligned orbits in a disk around a central supermassive black hole (SMBH). T…
The Delay Time Distribution of Tidal Disruption Flares
Nicholas C. Stone, Aleksey Generozov, Eugene Vasiliev +1
Recent observations suggest that stellar tidal disruption events (TDE) are strongly overrepresented in rare, post-starburst galaxies. Several dynamical mechanisms have been propose…