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- California Institute of TechnologyUS300 papers
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31 papers · 1 filter
Globular Cluster Ultraluminous X-ray Sources in the Furthest Early-Type Galaxies
E. Thygesen, Y. Sun, J. Huang +5
Ultraluminous X-ray Sources (ULXs) in globular clusters are low mass X-ray binaries that achieve high X-ray luminosities through a currently uncertain accretion mechanism. Using ar…
The Merger Fraction of Ultramassive White Dwarfs
Mukremin Kilic, Adam G. Moss, Alekzander Kosakowski +6
We search for merger products among the 25 most massive white dwarfs in the Montreal White Dwarf Database 100 pc sample through follow-up spectroscopy and high-cadence photometry.…
Optical and X-ray Follow-Up to a Globular Cluster Ultraluminous X-ray Source in NGC 4472
Wasundara R. Athukoralalage, Kristen C. Dage, Stephen E. Zepf +4
NGC 4472 is home to five ultraluminous X-ray sources hosted by globular clusters. These sources have been suggested as good black hole candidates in extragalactic globular clusters…
Astrometry of variable compact radio sources: A search for Galactic black hole X-ray binaries
P. Atri, J. C. A. Miller-Jones, A. Bahramian +7
We use the Very Long Baseline Array to conduct high precision astrometry of a sample of 33 compact, flat spectrum, variable radio sources in the direction of the Galactic plane (Be…
The simultaneity of emission from approaching and receding jets
Thomas J. Maccarone, Eli C. Pattie, Alexandra J. Tetarenko
We show that the standard Blandford-Königl model for compact conical relativistic jets has a peculiar feature: at a given observed frequency of radiation, the emission from the app…
GROWTH on S190426c II: GROWTH-India Telescope search for an optical counterpart with a custom image reduction and candidate vetting pipeline
Harsh Kumar, Varun Bhalerao, G. C. Anupama +17
S190426c / GW190426_152155 was the first probable neutron star - black hole merger candidate detected by the LIGO-Virgo Collaboration. We undertook a tiled search for optical count…