Jura Borissova et al 2019 AJ 158 46
A combination of near-infrared photometry, spectroscopy, and astrometry has revealed 29 OB type, Wolf–Rayet, and emission-line stars in the nearby star-forming complex G305 — 18 of which are newly classified.
Bernd Husemann et al 2019 ApJ 879 75
VLT-MUSE and ALMA observations of the extended narrow-line region and molecular gas around quasar 3C 273 suggest a jet-driven, expanding hot gas cocoon is impacting on an inclined gas disk, driving complex motions.
Bill Paxton et al 2019 ApJS 243 10
Updates to the MESA software instrument include functionality for modeling nonlinear pulsations of variable stars, enhanced numerical energy conservation capabilities, and improvements for modeling rotating stars.
Di Xiao et al 2019 ApJL 879 L7
The emission of the X-ray transient CDF-S XT2 can be well explained by the gradual magnetic dissipation process of an ultra-relativistic wind from a magnetar recently born in a binary neutron star merger.
George Vejar et al 2019 ApJ 879 38
Two color–color diagrams show the greatest promise for cleanly separating planetary nebulae from stars, background galaxies, and quasars in future surveys: the r − i versus g − r, and the r − i versus u − g diagrams.
Theron W. Carmichael et al 2019 AJ 158 38
A newly discovered brown dwarf, EPIC 212036875b, falls in the middle of the so-called brown-dwarf desert, suggesting that this is either a rare object or the brown-dwarf desert may not be so dry after all.