18 citations · 44 across the 21 of their papers we have counts for
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Mixed origins: strong natal kicks for some black holes and none for others
Pranav Nagarajan, Kareem El-Badry
Using stellar kinematic data from Gaia DR3, we revisit constraints on black hole (BH) natal kicks from observed accreting and detached BH binaries. We compare the space velocities…
The companion mass distribution of post common envelope hot subdwarf binaries: evidence for boosted and disrupted magnetic braking?
Lisa Blomberg, Kareem El-Badry, Katelyn Breivik +6
We measure the mass distribution of main-sequence (MS) companions to hot subdwarf B stars (sdBs) in post-common envelope binaries (PCEBs). We carried out a spectroscopic survey of…
The Symbiotic X-ray Binary IGR J16194-2810: A Window on the Future Evolution of Wide Neutron Star Binaries From Gaia
Pranav Nagarajan, Kareem El-Badry, Casey Lam +1
We present optical follow-up of IGR J16194-2810, a hard X-ray source discovered by the INTEGRAL mission. The optical counterpart is a red giant at a distance of…
Validation of Gaia DR3 orbital and acceleration solutions with hierarchical triples
Pranav Nagarajan, Kareem El-Badry
Using data from Gaia DR3, we construct a sample of 14,791 gravitationally bound wide pairs in which one of the components is an unresolved binary with an astrometric orbital or acc…
ESPRESSO observations of Gaia BH1: high-precision orbital constraints and no evidence for an inner binary
Pranav Nagarajan, Kareem El-Badry, Amaury H. M. J. Triaud +9
We present high-precision radial velocity (RV) observations of Gaia BH1, the nearest known black hole (BH). The system contains a solar-type G star orbiting a massive dark companio…