He-Yang Liu et al 2019 ApJS 243 21
A new, complete sample of 14,584 broad-line active galactic nuclei (AGNs) at z < 0.35 is presented, providing the most updated, largest AGN sample data and enabling detailed investigations of AGN population properties.
A. R. Inglis et al 2019 ApJ 880 98
A systematic search for small-scale ephemeral coronal holes yielded only four examples over the time span of 2010–2015, with no corresponding signature seen in solar wind data at 1 AU.
Sergey A. Anfinogentov et al 2019 ApJL 880 L29
A coronal model is used to quantify a record-breaking coronal magnetic field observed to be 4,000 G (the strongest coronal fields are typically <2,000 G) at the base of the corona in solar active region NOAA 12673 in 2017.
Guy Nir et al 2019 AJ 158 70
Telescopes with an elongated pupil rather than a circular aperture may be able to attain better contrast when searching for faint companions located at low separations from bright stars.
Suvadip Sinha et al 2019 ApJ 880 84
A study of 33 eruptive solar filament events indicates that eruptive filaments can be considered precursors to solar flares, and coronal mass ejections usually occur within 2 hours of the start time of the filament eruption.
Amri Wandel and Lev Tal-Or 2019 ApJL 880 L21
Two planets around the ultra-cool nearby M-dwarf Teegarden’s Star are among the most Earth-like planets yet discovered. Habitability modeling suggests that they are attractive targets for biosignature searches.