Dominik J. Schwarz

Erratum: Searching for Axionlike Particles under Strong Gravitational Lenses [Phys. Rev. Lett. 126 , 191102 (2021)]

Aritra Basu, Jishnu Goswami, Dominik J. Schwarz, Yuko Urakawa

This corrects the article DOI: 10.1103/PhysRevLett.126.191102.

Aspects of spatially correlated random fields: Extreme-value statistics and clustering properties

Kyungmee Choi, James Creswell, Florian Kühnel, Dominik J. Schwarz

Rare events of large-scale spatially correlated exponential random fields are studied. The influence of spatial correlations on clustering and nonsphericity is investigated. The size of the performed simulations permits to study beyond-7.5-sigma events (one in 10 13 ). As an application, this …

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Overdispersed Radio Source Counts and Excess Radio Dipole Detection

Dominik J. Schwarz, Prabhakar Tiwari, Morteza Pashapour-Ahmadabadi, Benedict Bahr-Kalus et autres

The source count dipole from wide-area radio continuum surveys allows us to test the cosmological standard model. Many radio sources have multiple components, which can cause an overdispersion of the source counts distribution. We account for this effect via a new Bayesian …

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The clustering of active galactic nuclei and star-forming galaxies in the LoTSS Deep Fields

Catherine Hale, P. N. Best, K. J. Duncan, R. Kondapally et autres

ABSTRACT Using deep observations across three of the LOFAR Two-metre Sky Survey Deep Fields, this work measures the angular clustering of star-forming galaxies (SFGs) and low-excitation radio galaxies (LERGs) to $z$$\lesssim$1.5 for faint sources, $S_{\textrm {144~MHz}}$$\ge$200 $\mu$Jy. We measure the angular auto-correlation …

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Impact of adiabatic temperature fluctuations on the power spectrum of axion density perturbations

Ahmed Ayad, Dominik J. Schwarz

Abstract Axions and axion-like particles (ALPs) have gained substantial attention as potential candidates for cold dark matter. The ALP field can exhibit fluctuations stemming from initial conditions. These initial field fluctuations hold the potential to give rise to gravitationally bound configurations known …

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Cosmology from LOFAR Two-metre Sky Survey Data Release 2: Counts-in-cells statistics

Morteza Pashapour-Ahmadabadi, Thilo M. Siewert, Dominik J. Schwarz, Catherine Hale et autres

Context. The second data release of the LOFAR Two-Metre Sky Survey (LoTSS-DR2) extends the first data release in terms of sky coverage and source density. It provides the largest radio source catalogue to date, including 4.4 million sources and covering 5635 square …

Cosmology from LOFAR Two-metre Sky Survey Data Release 2: Cross-correlations with luminous red galaxies from eBOSS

Jinglan Zheng, Prabhakar Tiwari, Gong‐Bo Zhao, Dominik J. Schwarz et autres

We cross-correlated galaxies from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) second data release (DR2) radio source with the extended Baryon Oscillation Spectroscopic Survey (eBOSS) luminous red galaxy (LRG) sample to extract the baryon acoustic oscillation (BAO) signal and constrain the …

Cosmology from LOFAR Two-metre Sky Survey Data Release 2: Cross-correlations with luminous red galaxies from eBOSS

Jinglan Zheng, Prabhakar Tiwari, Gong‐Bo Zhao, Dominik J. Schwarz et autres

Aims. We cross-correlated galaxies from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) second data release (DR2) radio source with the extended Baryon Oscillation Spectroscopic Survey (eBOSS) luminous red galaxy (LRG) sample to extract the baryon acoustic oscillation (BAO) signal and constrain …

The kinematic contribution to the cosmic number count dipole

J. D. Wagenveld, Sebastian von Hausegger, H.-R. Klöckner, Dominik J. Schwarz

Measurements of the number-count dipole with large surveys have shown amplitudes in tension with kinematic predictions based on the observed Doppler dipole of the cosmic microwave background (CMB). These observations seem to be in direct conflict with a homogeneous and isotropic universe …

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Editorial: An overview of some article types in EPJC and introducing the new section on “Computing, Software and Data Science”

F. Forti, J. Monroe, M. Elsing, Dominik J. Schwarz et autres

Forti F, Monroe J, Elsing M, et al. Editorial: An overview of some article types in EPJC and introducing the new section on "Computing, Software and Data Science". European Physical Journal C, The : Particles and Fields. 2025;85(2): 169.

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A hidden Active Galactic Nuclei population: the first radio luminosity functions constructed by physical process

L. K. Morabito, R. Kondapally, P. N. Best, Bin Yue et autres

Both star formation (SF) and Active Galactic Nuclei (AGN) play an important role in galaxy evolution. Statistically quantifying their relative importance can be done using radio luminosity functions. Until now these relied on galaxy classifications, where sources with a mixture of radio …

A hidden active galactic nucleus population: the first radio luminosity functions constructed by physical process

L. K. Morabito, R. Kondapally, P. N. Best, B. H. Yue et autres

ABSTRACT Both star formation (SF) and active galactic nuclei (AGNs) play an important role in galaxy evolution. Statistically quantifying their relative importance can be done using radio luminosity functions (RLFs). Until now these relied on galaxy classifications, where sources with a mixture …

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