10 papers
A spectacular multi-wavelength transient associated with an off-axis relativistic jet
Delina Levine, Gregg Hallinan, Jean J. Somalwar +10
Many of the most luminous extragalactic transients originate from the accretion of material onto a black hole (BH) via core-collapse, stellar mergers, or the tidal disruption of a…
Las Cumbres Observatory Gravitational-Wave Follow-up in the Third and Fourth Observing Runs: Strengths and Weaknesses of a Rapid Response Galaxy Targeted Strategy
Ido Keinan, Iair Arcavi, D. Andrew Howell +34
We present a summary of gravitational-wave (GW) follow-up using the Las Cumbres Observatory global network of telescopes during the third (O3) and fourth (O4) observing runs of the…
Revisiting GW170817 at milliarcsecond scale: high-precision constraints on jet geometry and
Kelly Gourdji, Adam T. Deller, Chris Flynn +4
The historic detection of gravitational waves from the electromagnetically bright binary neutron star merger GW170817 enabled the first standard siren measurement of Hubble's const…
X-ray Transmission Through Photoionized Gas with Moderate Thomson Optical Depth
Taya Govreen-Segal, Ehud Nakar, Eliot Quataert
We model the absorption of X-rays by gas obscuring the source and photoionized by it. We consider a broad range of column densities, including both Thomson-thin and Thomson-thick m…
Monte Carlo simulations of relativistic shock breakout from a stellar wind
Hirotaka Ito, Amir Levinson, Ehud Nakar +1
We present Monte Carlo simulations of relativistic radiation-mediated shocks (RRMS) in the photon-starved regime, incorporating photon escape from the upstream region--characterize…
AT2018cow Powered by a Shock in Aspherical Circumstellar Media
Taya Govreen-Segal, Ehud Nakar, Kenta Hotokezaka +2
We present a quantitative model for the luminous fast blue optical transient AT2018cow in which a shock propagating through an aspherical circumstellar medium (CSM) produces the X-…