157 citations · 237 across the 11 of their papers we have counts for
11 papers
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…
A Scaling Law for the Orbital Architecture of Planetary Systems Formed by Gravitational Scattering and Collisions
Eiichiro Kokubo, Haruka Hoshino, Yuji Matsumoto +1
In the standard formation models of terrestrial planets in the solar system and close-in super-Earths in non-resonant orbits recently discovered by exoplanet observations, planets…
Radio emission from tidal disruption events produced by the collision between super-Eddington outflows and the circumnuclear medium
Fangyi, Hu, Adelle Goodwin +4
In this Letter, we simulate the collision between outflows from the tidal disruption of a 1M main sequence star around a M black hole and an initially spheric…
Supermassive black holes stripping a subgiant star down to its helium core: a new type of multi-messenger source for LISA
Aleksandra Olejak, Jakob Stegmann, Selma E. de Mink +3
Some stars orbiting supermassive black holes (SMBH) are expected to undergo a gravitational-wave (GW)-driven inspiral and initiate mass transfer on nearly circular orbits. However,…
Hypervelocity Stars Trace a Supermassive Black Hole in the Large Magellanic Cloud
Jiwon Jesse Han, Kareem El-Badry, Scott Lucchini +5
Hypervelocity stars (HVSs) are produced by the Hills mechanism when a stellar binary is disrupted by a supermassive black hole (SMBH). The HVS Survey detected 21 unbound B-type mai…
The unreasonable effectiveness of the approximation
Elisha Modelevsky, Nicholas C. Stone, Re'em Sari
In kinetic theory, the classic approach calculates the rate of particle interactions from local quantities: the number density of particles , the cross-section , and t…
On the aspect ratio of Oumuamua: less elongated shape for irregular surface properties
A. Vazan, R. Sari
The large brightness variation in the observed lightcurve of Oumuamua is probably related to its shape, i.e., to the ratio between its longest axis and its shortest axis (aspect ra…
Radio Monitoring of the Tidal Disruption Event Swift J164449.3+573451. II. The Relativistic Jet Shuts Off and a Transition to Forward Shock X-ray/Radio Emission
B. A. Zauderer, E. Berger, R. Margutti +5
We present continued multi-frequency radio observations of the relativistic tidal disruption event Sw1644+57 extending to dt~600 d. The data were obtained with the JVLA and AMI Lar…
New insights on the duration distribution of long GRBs from Collapsars
Omer Bromberg, Ehud Nakar, Tsvi Piran +1
According the Collapsar model long gamma-ray bursts (LGRBs) involve relativistic jets that puncture the envelope of a collapsing star, and produced the γ-rays after they break out.…
Evidence for a compact Wolf-Rayet progenitor for the Type Ic supernova PTF 10vgv
A. Corsi, E. O. Ofek, A. Gal-Yam +22
We present the discovery of PTF 10vgv, a Type Ic supernova detected by the Palomar Transient Factory, using the Palomar 48-inch telescope (P48). R-band observations of the PTF 10vg…