activity
20052026
most citedThe Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. II. The seven stellar populations of NGC7089 (M2)

135 citations · 696 across the 17 of their papers we have counts for

collaborators

17 papers

astro-ph.GA2026

The Delegate Survey: KOALA/AAOmega-IFU spectroscopy of three nearby dwarf galaxies

Kyungdo Ko, Helmut Jerjen, Sarah M. Sweet +6

Assessing the cosmological typicality of the Local Group is crucial for establishing whether its dwarf galaxy population is representative. To this end, the Delegate Survey targets…

astro-ph.GA2026★ 1 cited

Detectability of Satellite Planes in Mock Observations of Isolated L* Galaxies

Ethan Crosby, Marcel S. Pawlowski, Oliver Müller +1

The existence and prevalence of planar, co-rotating distributions of satellite galaxies around L* host galaxies in the local universe remains a subject of ongoing debate. Despite n…

astro-ph.GA2024★ 1 cited

On the origin of the Hercules group: II. the Trojan quasi-periodic identity on the orbital level

Yusen Li, Kenneth Freeman, Helmut Jerjen

The Hercules kinematic group is a stellar anomaly structure observed in the solar neighbourhood (SNd). In the previous paper, we analysed chemical signatures and related the origin…

astro-ph.GA2024★ 3 cited

On the origin of the Hercules group: I. chemical signatures indicating the outer bar origin

Yusen Li, Kenneth Freeman, Helmut Jerjen +3

The Hercules kinematic group is a kinematic anomaly of stars observed in the solar neighbourhood (SNd). In this series of papers, we present a comprehensive study of this structure…

astro-ph.GA2023★ 12 cited

New dwarf galaxy candidates in the sphere of influence of the Local Volume spiral galaxy NGC2683

E. Crosby, H. Jerjen, O. Müller +3

We present initial results of a survey of host galaxies environments in the Local Volume (Mpc) searching for satellite dwarf galaxy candidates using the wide-field…

astro-ph.SR2017★ 49 cited

Photometry and spectroscopy of multiple populations along the AGB of NGC2808 and NGC6121 (M4)

A. F. Marino, A. P. Milone, D. Yong +8

We present a photometric and spectroscopic study of multiple populations along the asymptotic-giant branch (AGB) of the intermediate-metallicity globular clusters (GCs) NGC2808 and…