Matthew W. Muterspaugh et al 2015. AJ 150 140
Astronomers missed the long-awaited eclipse of a binary star system with a 26-year period due to three mis-measurements of the system made ~100 years ago!
Anthony H. Gonzalez et al 2015 ApJ 812 L40
The galaxy cluster MOO J1142+1527 is most massive galaxy cluster known at z > 1.15. It’s expected to be one of the ~5 most massive clusters to exist above this redshift over the entire sky.
Vaidehi S. Paliya et al 2015 ApJ 811 143
The blazar Mrk 421 flared in 2013 with the fastest variability ever recorded for it. This may have been caused by magnetic energy dissipation and reconnection in a fast-moving region within the jet.
L. Testi et al 2015 ApJ 812 L38
The protoplanetary disk around HL Tau, shown by ALMA to have gaps, was searched for point sources corresponding to planets. None were found, setting upper limits to possible planet masses.
Shin Toriumi et al 2015 ApJ 811 137
Analysis of a light bridge that divides a sunspot into smaller regions shows that magnetoconvective evolution within the bridge drives local chromospheric brightening and dark surges.
Song Wang et al 2015 ApJ 812 L34
The ultraluminous X-ray source (ULX) M82-X1 may be a black hole being fed by a supergiant, based on the candidate optical counterparts discovered using HST.