90 citations · 263 across the 11 of their papers we have counts for
11 papers
Sodium Brightening of (3200) Phaethon Near Perihelion
Qicheng Zhang, Karl Battams, Quanzhi Ye +2
Sunskirting asteroid (3200) Phaethon has been repeatedly observed in STEREO HI1 imagery to anomalously brighten and produce an antisunward tail for a few days near each perihelion…
Dust Evolution in the Coma of Distant, Inbound Comet C/2017 K2 (PANSTARRS)
Qicheng Zhang, Ludmilla Kolokolova, Quanzhi Ye +1
C/2017 K2 (PANSTARRS) is an Oort cloud comet previously observed to be active at heliocentric distances r>20 au on what is likely its first passage through the inner solar system.…
Preview of Comet C/2021 A1 (Leonard) and Its Encounter with Venus
Qicheng Zhang, Quanzhi Ye, Shreyas Vissapragada +2
Long period comet C/2021 A1 (Leonard) will approach Venus to within 0.029 au on 2021 December 18 and may subsequently graze the planet with its dust trail less than two days later.…
Disintegration of Long-Period Comet C/2019 Y4 (ATLAS): I. Hubble Space Telescope Observations
Quanzhi Ye, David Jewitt, Man-To Hui +8
Near-Sun Comet C/2019 Y4 (ATLAS) is the first member of a long-period comet group observed to disintegrate well before perihelion. Here we present our investigation into this disin…
Multi-Epoch VLBI of L Dwarf Binary 2MASS J0746+2000AB: Precise Mass Measurements and Confirmation of Radio Emission from Both Components
Qicheng Zhang, Gregg Hallinan, Walter Brisken +2
Surveys have shown that up to one tenth of all ultracool dwarfs (UCDs) are appreciable radio emitters, with their emission attributed to a combination of gyrosynchrotron radiation…
Orbital Deflection of Comets by Directed Energy
Qicheng Zhang, Philip M. Lubin, Gary B. Hughes
Cometary impacts pose a long-term hazard to life on Earth. Impact mitigation techniques have been studied extensively, but they tend to focus on asteroid diversion. Typical asteroi…
Prospects for Backtracing 1I/`Oumuamua and Future Interstellar Objects
Qicheng Zhang
1I/`Oumuamua is the first of likely many small bodies of extrasolar origin to be found in the solar system. These interstellar objects (ISOs) are hypothesized to have formed in ext…
1I/2017 U1 (`Oumuamua) is Hot: Imaging, Spectroscopy and Search of Meteor Activity
Quan-Zhi Ye, Qicheng Zhang, Michael S. P. Kelley +1
1I/2017 U1 (`Oumuamua), a recently discovered asteroid in a hyperbolic orbit, is likely the first macroscopic object of extrasolar origin identified in the solar system. Here, we p…
Relativistic Spacecraft Propelled by Directed Energy
Neeraj Kulkarni, Philip Lubin, Qicheng Zhang
Achieving relativistic flight to enable extrasolar exploration is one of the dreams of humanity and the long term goal of our NASA Starlight program. We derive a fully relativistic…
Directed Energy Missions for Planetary Defense
Philip Lubin, Gary B. Hughes, Mike Eskenazi +14
Directed energy for planetary defense is now a viable option and is superior in many ways to other proposed technologies, being able to defend the Earth against all known threats.…
Orbital Simulations on Deflecting Near-Earth Objects by Directed Energy
Qicheng Zhang, Kevin J. Walsh, Carl Melis +2
Laser ablation of a Near-Earth Object (NEO) on a collision course with Earth produces a cloud of ejecta which exerts a thrust on the NEO, deflecting it from its original trajectory…