125 citations · 1.1k across the 36 of their papers we have counts for
9 papers · 1 filter
The Origins of X-ray Line Emissions in Circinus~X-1 at Very Low X-ray Flux
N. S. Schulz, T. E. Kallman, S. Heinz +3
Accretion conditions and morphologies of X-ray transients containing neutron stars are still poorly understood. Circinus X-1 is an enigmatic case where we observe X-ray flux change…
Chandra X-ray Constraints on the Candidate Ca-rich Gap Transient SN 2016hnk
P. H. Sell, K. Arur, T. J. Maccarone +4
We present a Chandra observation of SN 2016hnk, a candidate Ca-rich gap transient. This observation was specifically designed to test whether or not this transient was the result o…
An excess of low-mass X-ray binaries in the outer halo of NGC 4472
Lennart M. van Haaften, Thomas J. Maccarone, Paul H. Sell +4
We present new Chandra observations of the outer halo of the giant elliptical galaxy NGC 4472 (M49) in the Virgo Cluster. The data extend to 130 kpc (28'), and have a combined expo…
Lord of the Rings: A Kinematic Distance to Circinus X-1 from a Giant X-Ray Light Echo
Sebastian Heinz, Michael G. Burton, Catherine Braiding +6
Circinus X-1 exhibited a bright X-ray flare in late 2013. Follow-up observations with Chandra and XMM-Newton from 40 to 80 days after the flare reveal a bright X-ray light echo in…
Calcium-Rich Gap Transients: Tidal Detonations of White Dwarfs?
P. H. Sell, T. J. Maccarone, R. Kotak +2
We hypothesize that at least some of the recently discovered class of calcium-rich gap transients are tidal detonation events of white dwarfs (WDs) by black holes (BHs) or possibly…
Shell-Shocked: The Interstellar Medium Near Cygnus X-1
P. H. Sell, S. Heinz, E. Richards +6
We conduct a detailed case-study of the interstellar shell near the high-mass X-ray binary, Cygnus X-1. We present new WIYN optical spectroscopic and Chandra X-ray observations of…