A5013656949- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Solar and Space Plasma Dynamics
- Particle Accelerators and Free-Electron Lasers
- Scientific Research and Discoveries
University of Tübingen
2022-2024
Max Planck Institute for Astrophysics
2021
The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite began surveying sky in December 2019, with aim of producing all-sky X-ray source lists and maps an unprecedented depth. Here we present catalogues both point-like extended sources using data acquired first six months survey operations (eRASS1; completed June 2020) over half whose proprietary rights lie German Consortium. We describe observation process, analysis pipelines, characteristics sources. With nearly 930...
The hypothesis that the late Universe is isotropic and homogeneous adopted by most cosmological studies, including studies of galaxy clusters. cosmic expansion rate H 0 thought to be spatially constant, while bulk flows are often presumed negligible compared Hubble expansion, even at local scales. effects on redshift–distance conversion hence usually ignored. Any deviation from this consensus can strongly bias results such thus importance testing these assumptions cannot understated. Scaling...
In standard cosmology, the Universe is assumed to be statistically homogeneous and isotropic. This assumption suggests that expansion rate of Universe, as measured by Hubble parameter, should same in all directions. However, our recent study based on galaxy clusters finds an apparent angular variation approximately $9<!PCT!>$ constant, $H_0$, across sky. study, authors utilised cluster scaling relations between various cosmology-dependent properties a cosmology-independent property,...
We present the results of a systematic X-ray analysis optically rich galaxy clusters detected by Subaru HSC survey in eROSITA eFEDS field. Through joint SRG/eROSITA and Subaru/HSC surveys, we aim to study dynamical status selected derive cluster scaling relations. The sample consists 43 with richness $>40$ $0.16<z<0.89$. systematically analyzed images spectra using data. identified BCG optical far-infrared databases. evaluated cluster's measuring offset between peak position, gas...
In standard cosmology, the late Universe is assumed to be statistically homogeneous and isotropic. However, a recent study based on galaxy clusters by Migkas et al. (2021, arXiv:2103.13904) found an apparent spatial variation of approximately $9\%$ in Hubble constant, $H_0$, across sky. The authors utilised cluster scaling relations between various cosmology-dependent properties cosmology-independent property, i.e., temperature intracluster gas $(T)$. A position-dependent systematic bias $T$...
We report the results obtained from XMM-Newton observations of TeV-detected supernova remnant (SNR) HESS J1534-571. focus on nature cosmic-ray particle content in SNR, which is revealed by its γ -ray emission. No signatures X-ray synchrotron emission were detected SNR. This consistent with earlier Suzaku other regions object. A joint modeling and spectra yields an upper limit for total flux SNR area ~5.62 × 10 −13 erg cm −2 s −1 (95% C.I.) energy band 2.0–10.0 keV assumed photon index 2.0....
We present the results of a systematic X-ray analysis optically rich galaxy clusters detected by Subaru HSC survey in eROSITA eFEDS field. Through joint SRG/eROSITA and Subaru/HSC surveys, we aim to study dynamical status selected derive cluster scaling relations. The sample consists 43 with richness $>40$ $0.16
We report the results obtained from XMM-Newton observations of TeV-detected supernova remnant (SNR) HESS J1534-571. focus on nature cosmic-ray particle content in SNR, which is revealed by its $\gamma$-ray emission. No signatures X-ray synchrotron emission were detected SNR. This consistent with earlier Suzaku other regions object. A joint modeling and spectra yields an upper limit for total flux SNR area $\sim$ 5.62$ \times 10^{-13} \ \mathrm{erg\ cm^{-2}\ s^{-1}}$ (95% c.l.) energy band...