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36 papers
Sharpening the Mass Measurement of PSR J1048+2339 via High-Cadence Photometry
Kwan-Lok Li, Ka-Yui Au, Lupin C. C. Lin +3
Neutron stars are among the densest objects in the universe, and the mass measurements are crucial to the understanding of their equation of state. Pulsars in tight binaries can be…
Two Possible Optical--X-Ray Anti-Correlations of PSR J1023+0038
Ka-Yui Au, Kwan-Lok Li, Albert K. H. Kong +3
X-ray emission is generally believed to be one of the major heating sources for the optical modulation in redback pulsar binaries as we have seen similar phenomena in many low mass…
Effectiveness of Stacks in the Stacked Hilbert-Huang Transform
Lupin Chun-Che Lin, Chin-Ping Hu, Chien-Chang Yen +6
The Hilbert-Huang transform (HHT) consists of empirical mode decomposition (EMD), which is a template-free method that represents the combination of different intrinsic modes on a…
First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
The Event Horizon Telescope Collaboration
We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A), the Galactic center source associated with a supermassive black hole. These observati…
A ring-like accretion structure in M87 connecting its black hole and jet
Ru-Sen Lu, Keiichi Asada, Thomas P. Krichbaum +118
The nearby radio galaxy M87 is a prime target for studying black hole accretion and jet formation^{1,2}. Event Horizon Telescope observations of M87 in 2017, at a wavelength of 1.3…
Multi-Wavelength Observations Of A New Redback Millisecond Pulsar 4FGL J1910.7-5320
Ka-Yui Au, Jay Strader, Samuel J. Swihart +9
We present the study of multi-wavelength observations of an unidentified Fermi Large Area Telescope (LAT) source, 4FGL J1910.7-5320, a new candidate redback millisecond pulsar bina…