David Nesvorný et al 2017 AJ 153 103
Modeling suggests the large-asteroid impact flux dropped by 1–2 orders of magnitude during the first 1 Gyr of the Solar System’s existence and remained relatively unchanged over the last 3 Gyr.
Rui Xue et al 2017 ApJ 837 172
Lyα halo sizes at high redshift are observed to scale with various host galaxy properties, suggesting that the physical conditions of the circumgalactic medium change with halo mass and/or star formation rates.
David Radice 2017 ApJL 838 L2
Simulations of the flow inside remnants of binary neutron star mergers show that turbulence can significantly affect the structure and survival time of the merger remnant and its gravitational-wave emissions.
Mukremin Kilic et al 2017 ApJ 837 162
A detailed analysis of the white dwarfs in the local 40 pc suggests ages of 6.8–7.0 Gyr for the thin disk and 8.6–8.8 Gyr for the thick disk. The inner galactic halo is estimated to have an age of 9.1–13.9 Gyr.
Paola Oliva-Altamirano et al 2017 AJ 153 89
A study of 22 central galaxies indicates that galaxies with larger stellar mass are more likely to exhibit slow rotation than those with smaller stellar mass. No dependence on host cluster halo mass is seen, however.
H. N. Smitha et al 2017 ApJS 229 17
High-resolution Sunrise observations from 2009 — the observatory’s first balloon-borne flight — indicate a magnetic flux emergence rate in the quiet Sun that is 10x larger than fluxes estimated using Hinode data.