As part of a program to measure abundance ratios in stars beyond 15 kpc from the Galactic center, we have discovered a metal-poor star in the outer halo with a...
A universal method for solar filament detection from Hα observations using semi-supervised deep learning
Filaments are omnipresent features in the solar atmosphere. Their location, properties, and time evolution can provide important information about changes in...
A Variable Mid-infrared Synchrotron Break Associated with the Compact Jet in GX 339-4
Many X-ray binaries remain undetected in the mid-infrared, a regime where emission from their compact jets is likely to dominate. Here, we report the detection...
We report the discovery of a very cool brown dwarf, ULAS J003402.77-005206.7 (ULAS J0034-00), identified in the UKIRT Infrared Deep Sky Survey First Data...
A very dark stellar system lost in Virgo: kinematics and metallicity of SECCO 1 with MUSE
We present the results of VLT-MUSE (Very Large Telescope-Multi Unit Spectroscopic Explorer) integral field spectroscopy of SECCO 1, a faint, star-forming...
A very personal semblance of archaeoastronomy pioneer Professor Michael Hoskin, colleague, mentor and friend
Michael Hoskin is the name of a scholar whose memory will remain forever linked to cultural astronomy. Professor of History of Science at the University of...
A Very Small Array search for the extended Sunyaev-Zel'dovich effect in the Corona Borealis supercluster
We present interferometric imaging at 33 GHz of the Corona Borealis supercluster, using the extended configuration of the Very Small Array. A total area of 24...
A Very-High-Energy Gamma-Ray View of the Transient Sky
The development of the latest generation of Imaging Atmospheric Cherenkov Telescopes (IACTs) over recent decades has led to the discovery of new extreme...
A view of the H-band light-element chemical patterns in globular clusters under the AGB self-enrichment scenario
We discuss the self-enrichment scenario by asymptotic giant branch (AGB) stars for the formation of multiple populations in globular clusters (GCs) by analysing...