23 papers
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…
Evidence for a thermal pressure deficit in galaxy groups from the tSZ effect and weak lensing
Jared Siegel, Alexandra Amon, Jenny E. Greene +3
Measurements of the thermal Sunyaev-Zel'dovich (tSZ) effect have yet to form a consistent picture of the thermodynamic state of the gas in the intracluster medium: their interpreta…
Thermal or Non-thermal? Diffuse emission in the infall region of stacked galaxy groups
E. Bulbul, X. Zhang, Z. Ding +16
The authors stack eROSITA X‑ray data for 827 low‑mass galaxy groups to detect faint diffuse emission out to ~2 R200, measuring temperature, density, and metal abundance in the infa…
Idealized Global Models of Accretion Disks with Strong Toroidal Magnetic Fields
Minghao Guo, Eliot Quataert, Jonathan Squire +2
We present global magnetohydrodynamic (MHD) simulations of idealized accretion disks with a strong toroidal magnetic field using an equation of state that fixes the gas thermal sca…
Steady-state Stellar Winds Driven by Recombination
Eritas Yang, Eliot Quataert
Hydrogen and helium recombination energy has been proposed as a potential driver of mass ejection in common-envelope evolution and other eruptive stellar phenomena. We investigate…
Resolving the (Debate About) Nozzle Shocks in Tidal Disruption Events
Zachary L. Andalman, Eliot Quataert, Eric R. Coughlin +1
When a star passes within the Roche limit of a supermassive black hole (SMBH), it is pulled apart by the BH's tidal field in a tidal disruption event (TDE). The resulting flare is…