Gautham Narayan et al 2019 ApJS 241 20
A network of 19 faint northern and equatorial white dwarfs are presented as spectrophotometric standards for present and future ground- and space-based, wide-field, ultraviolet to near-infrared observatories.
C. L. Carilli et al 2019 ApJL 874 L32
The first direct imaging of what may be the thick torus in the active galactic nucleus of the powerful radio galaxy Cygnus A was conducted using the Jansky VLA at 18–48 GHz, with a resolution down to 45 mas.
G. Zsidi et al 2019 ApJ 873 130
Accretion-disk modeling plus long-term data from the Wide-field Infrared Survey Explorer (WISE) of the eruptive star V582 Aur suggest this source is fading and will reach the quiescent level in ~80 yr.
Andrew I. Hsu et al 2019 AJ 157 152
Dark vortices on Neptune are explored over 25 years of HST data, demonstrating that dark spots have average occurrence rates of one dark spot every 4–6 years, and each spot typically has a lifetime of 1–6 years.
L. Kaltenegger et al 2019 ApJL 874 L8
The TESS Habitable Zone Stars Catalog is a list of 1,822 bright nearby stars with reliable distances from Gaia DR2, around which NASA’s TESS mission can detect transiting planets that receive Earth-like irradiation.
Ying D. Liu et al 2019 ApJS 241 15
A comparative study of the 2012 July and 2017 July solar eruptions suggests that superstorms are “perfect storms” in nature, i.e., a combination of circumstances results in an event of an unusual magnitude.