Raphael Zöller
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View article: Time-delay cosmography: analysis of quadruply lensed QSO SDSSJ1433 from Wendelstein Observatory
Time-delay cosmography: analysis of quadruply lensed QSO SDSSJ1433 from Wendelstein Observatory Open
The goal of this work is to estimate the Hubble constant $H_0$ through the time-delay cosmographic study of the quadruply lensed, variable quasi-stellar objects (QSO) SDSSJ1433+6007. We combine multifilter, archival Hubble Space Telescope …
View article: <i>Euclid</i>: Early Release Observations of diffuse stellar structures and globular clusters as probes of the mass assembly of galaxies in the Dorado group
<i>Euclid</i>: Early Release Observations of diffuse stellar structures and globular clusters as probes of the mass assembly of galaxies in the Dorado group Open
Deep surveys have helped to unveil the history of past and present galaxy mergers, and, in particular, uncovering their tidal debris and co-located globular clusters (GCs). Euclid ’s unique combination of capabilities (spatial resolution, …
View article: <i>Euclid</i>: Early Release Observations – Overview of the Perseus cluster and analysis of its luminosity and stellar mass functions★
<i>Euclid</i>: Early Release Observations – Overview of the Perseus cluster and analysis of its luminosity and stellar mass functions★ Open
The Euclid Early Release Observations (ERO) programme targeted the Perseus cluster of galaxies, gathering deep data in the central region of the cluster over 0.7 deg 2 , including the cluster core up to 0.25 r 200 . The dataset reaches a p…
View article: <i>Euclid</i>: Early Release Observations – Dwarf galaxies in the Perseus galaxy cluster
<i>Euclid</i>: Early Release Observations – Dwarf galaxies in the Perseus galaxy cluster Open
We make use of the unprecedented depth, spatial resolution, and field of view of the Euclid Early Release Observations (EROs) of the Perseus galaxy cluster to detect and characterise the dwarf galaxy population in this massive system. Usin…
View article: Extragalactic magnetar giant flare GRB 231115A: Insights from <i>Fermi</i>/GBM observations
Extragalactic magnetar giant flare GRB 231115A: Insights from <i>Fermi</i>/GBM observations Open
Magnetar giant flares (MGFs) are the extremely short, energetic transients originating from highly magnetized neutron stars. When observed in nearby galaxies, these rare events are nearly indistinguishable from cosmological short gamma-ray…
View article: Increasing efficiency and sustainability: A comparative analysis of concrete 3D printing and traditional methods based on case studies
Increasing efficiency and sustainability: A comparative analysis of concrete 3D printing and traditional methods based on case studies Open
At the forthcoming Concrete Solutions 2025 conference, the subject of concrete 3D printing will be explored in the “Case Studies” category, with a comparison to traditional methods. Concrete 3D printing offers several significant advantage…
Euclid: Early Release Observations – Dwarf galaxies in the Perseus galaxy cluster Open
We make use of the unprecedented depth, spatial resolution, and field of view of the Euclid Early Release Observations of the Perseus galaxy cluster to detect and characterise the dwarf galaxy population in this massive system. The Euclid …
View article: Time Delay Cosmography: Analysis of Quadruply Lensed QSO SDSSJ1433 from Wendelstein Observatory
Time Delay Cosmography: Analysis of Quadruply Lensed QSO SDSSJ1433 from Wendelstein Observatory Open
The goal of this work is to obtain a Hubble constant estimate through the study of the quadruply lensed, variable QSO SDSSJ1433+6007. To achieve this we combine multi-filter, archival $\textit{HST}$ data for lens modelling and a dedicated …
Ultra-Diffuse Galaxies $-$ A Distinct Population? Dwarf Galaxies in the Coma Cluster and A262 from Deep $u'-g'-r'$ Wendelstein Imaging Data Open
In this study, we compare the structural parameters of ultra-diffuse galaxies (UDGs) to those of other dwarf galaxies and investigate whether UDGs form a distinct population. We observed deep $u'$-, $g'$-, and $r'$-band images (maximum lim…