11 papers
Thermal Structure and Chemical Enrichment of the North and South Polar Spurs: Supersolar N/O and Ne/O in the X-ray Plasma
Anjali Gupta, Smita Mathur, Joshua Kingsbury +5
The North Polar Spur (NPS) is a prominent diffuse X-ray feature whose origin has remained uncertain for decades. Using a uniform analysis of archival \textit{Suzaku} and \textit{XM…
Not Where You Left Them: Displaced -Rays and X-Rays Reveal the Cosmic Ray Scattering Rate
Manami Roy, Mark R. Krumholz, Roland M. Crocker +1
Modern X-ray and -ray instruments are revealing a growing class of Galactic non-thermal sources whose emission centroids are measurably offset from the nearest plausible sites o…
Weibel Instability-Driven Seed Magnetic Fields during Reionization
Jorie McDermott, Manami Roy, Christopher M. Hirata
Cosmological reionization was a highly out-of-equilibrium event that affected every parcel of the intergalactic medium, making it a candidate for astrophysical generation of interg…
To Survive or to Shatter: The Impact of Cosmic Rays on the Fate of Stripped Cold Clouds
Manami Roy, Kung-Yi Su, Stephanie Tonnesen +3
Does cosmic ray (CR) pressure matter for the circumgalactic medium (CGM)? Despite growing interest, this remains a debated question, complicated by limited observational constraint…
Detection of 'super-virial' gas in the Circumgalactic medium of the Milky Way towards PKS 2155-304
Mukesh Singh Bisht, Sanskriti Das, Smita Mathur +3
We present the first simultaneous detection of four distinct highly ionized absorbing phases using Chandra and XMM-Newton grating spectra toward the blazar PKS 2155…
Where is the Supervirial Gas? III. Insights from X-ray Shadow Observations and a revised Model for the Soft Diffuse X-ray Background
Anjali Gupta, Smita Mathur, Joshua Kingsbury +5
Shadow observations provide a powerful tool to separate foreground components of the soft diffuse X-ray background (SDXB) from the background components. Such observations have now…
Where is the Super-virial Gas? II: Insight from the Survey of Galactic Sightlines
Manami Roy, Smita Mathur, Sanskriti Das +3
Recent observations have revealed a super-virial temperature gas phase at log(T/K) in the Milky Way, challenging existing galaxy-formation models. This hot gas phase was di…
Where is the Super-Virial Gas? The Supply from hot inflows
Manami Roy, Kung-Yi Su, Smita Mathur +1
In an effort to understand the presence of super-virial gas detected in the Milky Way, we present our findings from isolated galaxy simulations of Milky Way-like systems using GIZM…
Where is the Supervirial hot gas? I: A pilot study with sightlines to Galactic X-ray binaries
Armando Lara-DI, Yair Krongold, Smita Mathur +4
Hot, \logT\ 7.5, gas was recently discovered in the Milky Way in extragalactic sightlines. In order to determine its location, here we present sightlines to Galactic X-ray b…
Seeding the CGM: How Satellites Populate the Cold Phase of Milky Way Halos
Manami Roy, Kung-Yi Su, Stephanie Tonnesen +2
The origin of the cold phase in the CGM is a highly debated question. We investigate the contribution of satellite galaxies to the cold gas budget in the circumgalactic medium (CGM…
Beyond radial profiles: Using log-normal distributions to model the multiphase circumgalactic medium
Alankar Dutta, Mukesh Singh Bisht, Prateek Sharma +3
Recent observations and simulations reveal that the circumgalactic medium (CGM) surrounding galaxies is multiphase, with the gas temperatures spanning a wide range at most radii, $…