Amelia Bayo et al 2017 ApJL 841 L11
ALMA continuum observations reveal a disk surrounding OTS44, a young, low-mass (~12 Jupiter masses), cool, free-floating planet in the Chamaeleon I star-forming region.
Piero Madau and Tassos Fragos 2017 ApJ 840 39
New calculations show that the contribution of X-ray binaries to the ionization of the bulk IGM during the epoch of reionization is negligible; direct He I photoionizations are the main source of IGM heating.
M. Ansdell et al 2017 AJ 153 240
ALMA’s observations of dust and gas in 92 protoplanetary disks around σ Orionis members suggest that after only a few Myr of evolution most disks lack sufficient dust to form giant planet cores.
Masumi Shimojo et al 2017 ApJL 841 L5
Simultaneous observations in mm with ALMA, EUV with SDO/AIA, and soft X-rays with Hinode reveal an erupting plasmoid that is either isothermal 105 K plasma or a 104 K core with a hot envelope.
J. Kóta and J. R. Jokipii 2017 ApJ 839 126
A new model suggests Voyager 1’s observations of the galactic cosmic-ray flux beyond the heliopause could indicate the presence of a gradual shock followed by a slow decrease of magnetic field strength.
Zhe Xu et al 2017 ApJL 840 L21
Observations of a M7.9 solar flare reveal significant change in sunspot structure on the solar surface in response to the flare — likely due to the restructuring of coronal magnetic fields.