William E. Harris and Courtney J. Mulholland 2017 ApJ 839 102
HST photometry has revealed a population of intragalactic globular clusters (GCs) extending out to at least 500 kpc from the center of the Perseus Cluster; there may be 50,000 or more of these GCs.
Chelsea X. Huang et al 2017 AJ 153 210
N-body simulations show that unstable outer (>1 AU) giant planets can greatly reduce the multiplicity of inner super-Earths and leave the surviving population with large eccentricities and inclinations.
L. Marcotulli et al 2017 ApJ 839 96
A multiwavelength study of three high-redshift blazars shows that inverse Compton scattering of low-energy photons supplied by the broad-line region can explain the X-ray and gamma-ray emission observed.
C. Frohmaier et al 2017 ApJS 230 4
Detection efficiencies of the Palomar Transient Factory — a survey that has located 50,000 non-moving transient sources and spectroscopically confirmed 1900 supernovae — are presented in this study.
Megan Bedell et al 2017 ApJ 839 94
An extremely high-quality spectrum from Keck-HIRES of Kepler-11 reveal new values for its fundamental parameters that raise the calculated densities of its 6 planets by 20–95%, making them more typical.
Daniel Tamayo et al 2017 ApJL 840 L19
The configuration of the TRAPPIST-1 system of 7 planets is consistent with a history of slow, convergent disk migration resulting in its current long-lived resonant or near-resonant set of orbits.