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Misaligned jets from Sgr A and the origin of Fermi/eROSITA bubbles
Kartick C. Sarkar, Santanu Mondal, Prateek Sharma +1
One of the leading explanations for the origin of Fermi Bubbles is a past jet activity in the Galactic center supermassive black hole Sgr A. The claimed jets are often assumed…
Black Holes as "Time Capsules": A Cosmological Graviton Background and the Hubble Tension
Tsvi Piran, Raul Jimenez
Minuscule primordial black holes before the end and after inflation can serve as "time capsules" bringing back energy from the past to a later epoch when they evaporate. As these b…
Generalized equipartition method from an arbitrary viewing angle
Tatsuya Matsumoto, Tsvi Piran
The equipartition analysis yields estimates of the radius and energy of synchrotron self-absorbed radio sources. Here we generalize this method to relativistic off-axis viewed emit…
The collimation of relativistic jets in post-neutron star binary merger simulations
Matteo Pais, Tsvi Piran, Yuri Lyubarsky +2
The gravitational waves from the binary neutron star merger GW170817 were accompanied by a multi-wavelength electromagnetic counterpart, which confirms the association of the merge…
Extremely Relativistic Tidal Disruption Events
Taeho Ryu, Julian Krolik, Tsvi Piran
Extreme tidal disruption events (eTDEs), which occur when a star passes very close to a supermassive black hole, may provide a way to observe a long-sought general relativistic eff…
The velocity distribution of outflows driven by choked jets in stellar envelopes
Matteo Pais, Tsvi Piran, Ehud Nakar
Many stripped envelope supernovae (SNe) present a signature of high-velocity material responsible for broad absorption lines in the observed spectrum. These include SNe that are as…