Luboš Neslušan and Mária Hajduková 2021 AJ 162 20
New modeling suggests that the long-period comet C/1961 T1 (Seki) is the parent body of two meteor showers observed in Earth’s atmosphere: the December ρ-Virginids and the γ-Sagittariids.
Marc Rovira-Navarro et al 2021 Planet. Sci. J. 2 119
For a Mars-sized exomoon in a close, eccentric orbit around a gas giant planet, tidal heating can raise the surface temperatures to more than 400 K for 10 million yr, increasing the possibility of detection.
E. I. Mason et al 2021 ApJL 914 L8
An event has been observed that connects all major classes of solar eruptions: those that erupt into the heliosphere versus those that fail, and those that eject new flux (flux ropes), versus those that eject only new plasma (jets).
Kuo Liu et al 2021 ApJ 914 30
The first pulsar and transient survey of the galactic center with ALMA revealed no new pulsars, but it did produce the polarization profile of the magnetar PSR J1745−2900 at millimeter wavelengths for the first time.
Daniel B. Reisenfeld et al 2021 ApJS 254 40
IBEX measurements of the time difference between observations of the outbound solar wind and the heliospheric energetic neutral atoms with which they correlate are used to produce a 3D map of the heliosphere.
J. J. Hermes et al 2021 ApJL 914 L3
8.9-hr variability — likely from rotation — has been detected in light curves of LP 40−365, the prototype for a class of partly burnt runaway stars that have been ejected from a binary due to a thermonuclear supernova event.