43 citations · 99 across the 18 of their papers we have counts for
18 papers
Evolution of Main Sequence Stars Transferring Mass to a Supermassive Black Hole
Andrey Sandomirsky, Re'em Sari, Aleksandra Olejak +1
We consider main-sequence stars orbiting close to a supermassive black hole (SMBH), which are potential gravitational wave (GW) sources for LISA if their orbital periods are of the…
Emission line formation in scattering dominated media: implications for LRDs
Elisha Modelevsky, Omri Nitzan, Re'em Sari +1
Recent JWST observations of ``Little Red Dots'' (LRDs) reveal broad and prominent Balmer emission lines. We present a theoretical framework for intrinsic emission line formation an…
Superdiffusion at the Galactic Centre
Pau Amaro Seoane, Kostas Tzanavaris, Reinhard Genzel +14
Tracking S-star cluster orbits around Sgr A* calibrates orbital transport models for space-borne gravitational wave detectors. Standard kinetic theories model this cluster via loca…
Stellar rotation of S301 as a macroscopic gyroscope to test general relativity
Pau Amaro Seoane, Xian Chen, Alejandro Torres-Orjuela +16
Stellar trajectories around the Galactic Center provide a testing environment for general relativity. The intrinsic rotation of these stars evolves under covariant transport in cur…
Dynamics in Nuclear Stellar Clusters: The Impact of Collisions and Disrupted Binaries
Barak Rom, Re'em Sari
The nuclear stellar clusters surrounding supermassive black holes (SMBHs) host millions of stars and stellar remnants. We study how stellar collisions and binary disruptions, along…
Evolution of Stars During the Main Sequence and the Transition to the Red Giant Phase
Ravid Achituv, reem sari
We derive a simple analytical description for the structure and evolution of -- stars throughout main-sequence hydrogen burning. We obtain an analytical relation for…
The - Relation Has to Break
Omri Nitzan, Re'em Sari
We revisit the growth of central black holes via tidal disruption events (TDEs) and plunges of stellar-mass black holes (sBHs). Our model incorporates the current understanding of…
Transonic Solutions for Recombination-Driven Stellar Winds
Ilan Strusberg, Re'em Sari, Jim Fuller
We present an analytical stationary isentropic solution of the spherically symmetric Euler equations in the gravitational field of a star using an equation of state of ionizable mo…
General form for Pseudo-Newtonian Potentials, imitating Schwarzschild geodesics
Itamar Ben Arosh Arad, Reem Sari
We propose a new, general form for a pseudo-Newtonian gravitational potential (PNP), expressed as a series of Paczyński-Wiita-like functions with the addition of increasing negativ…
Universal Waveforms for Extreme Mass-Ratio Inspiral
Ilan Strusberg, Barak Rom, Re'em Sari
We engage with the challenge of calculating the waveforms of gravitational waves emitted by spinless binary black hole merger in extreme mass-ratio limit. We model the stellar-mass…
Binary mass transfer in 3D: Mass Transfer Rate and Morphology
T. Ryu, R. Sari, S. E. de Mink +6
Mass transfer is crucial in binary evolution, yet its theoretical treatment has long relied on analytic models whose key assumptions remain debated. We present a direct and systema…
Mass Segregation and Transient Formation in Nuclear Stellar Clusters
Barak Rom, Re'em Sari
Supermassive black holes at the centers of galaxies occasionally disrupt stars or consume stellar-mass black holes (BHs) that wander too close, producing observable electromagnetic…
Semi-Analytical Fokker Planck Models for Nuclear Star Clusters
Karamveer Kaur, Barak Rom, Re'em Sari
We study the dynamics of nuclear star clusters, the dense stellar environments surrounding massive black holes in the centers of galaxies. We consider angular momentum diffusion du…
Dynamics around supermassive black holes: Extreme mass-ratio inspirals as gravitational-wave sources
Barak Rom, Itai Linial, Karamveer Kaur +1
Supermassive black holes and their surrounding dense stellar environments nourish a variety of astrophysical phenomena. We focus on the distribution of stellar-mass black holes aro…
Self-similarity of the third type in ultra relativistic blastwaves
Tamar Faran, Andrei Gruzinov, Re'em Sari
A new type of self-similarity is found in the problem of a plane-parallel, ultra-relativistic blast wave, propagating in a powerlaw density profile of the form . S…
Formation of Merging Stellar-Mass Black Hole Binaries by Gravitational Wave Emission in Active Galactic Nucleus Disks
Barak Rom, Re'em Sari, Dong Lai
Many stellar-mass Black Holes (sBHs) are expected to orbit supermassive black holes at galactic centers. For galaxies with Active Galactic Nuclei (AGN), it is likely that the sBHs…
Evolution of Supernova Remnants near the Galactic Center
Almog Yalinewich, Tsvi Piran, Re'em Sari
Supernovae near the galactic center evolve differently from regular galactic supernovae. This is mainly due to the environment into which the supernova remnants propagate. Instead…
The Bright Gamma-Ray Burst 991208 - Tight Constraints on Afterglow Models from Observations of the Early-Time Radio Evolution
T. J. Galama, M. Bremer, F. Bertoldi +13
The millimeter wavelength emission from GRB 991208 is the second brightest ever detected, yielding a unique data set. We present here well-sampled spectra and light curves over mor…