Search Publications
The eROSITA Final Equatorial Depth Survey (eFEDS). X-ray catalogue
Finoguenov, A.; Haberl, F.; Schrabback, T. +35 more
Context. The eROSITA X-ray telescope on board the Spectrum-Poentgen-Gamma (SPG) observatory combines a large field of view and a large collecting area in the energy range between ~0.2 and ~8.0 keV. This gives the telescope the capability to perform uniform scanning observations of large sky areas.
Aims: SRG/eROSITA performed scanning observat…
Unveiling the Universe with emerging cosmological probes
Izzo, Luca; Verde, Licia; Risaliti, Guido +22 more
The detection of the accelerated expansion of the Universe has been one of the major breakthroughs in modern cosmology. Several cosmological probes (Cosmic Microwave Background, Supernovae Type Ia, Baryon Acoustic Oscillations) have been studied in depth to better understand the nature of the mechanism driving this acceleration, and they are being…
Ram pressure stripping in high-density environments
Fossati, Matteo; Sun, Ming; Boselli, Alessandro
Galaxies living in rich environments are suffering different perturbations able to drastically affect their evolution. Among these, ram pressure stripping, i.e. the pressure exerted by the hot and dense intracluster medium (ICM) on galaxies moving at high velocity within the cluster gravitational potential well, is a key process able to remove the…
A strangely light neutron star within a supernova remnant
Doroshenko, Victor; Santangelo, Andrea; Pühlhofer, Gerd +1 more
To constrain the equation of state of cold dense matter, astrophysical measurements are essential. These are mostly based on observations of neutron stars in the X-ray band, and, more recently, also on gravitational wave observations. Of particular interest are observations of unusually heavy or light neutron stars which extend the range of centra…
A highly magnified star at redshift 6.2
Mahler, Guillaume; Anderson, Jay; Broadhurst, Tom +26 more
Galaxy clusters magnify background objects through strong gravitational lensing. Typical magnifications for lensed galaxies are factors of a few but can also be as high as tens or hundreds, stretching galaxies into giant arcs1,2. Individual stars can attain even higher magnifications given fortuitous alignment with the lensing cluster. …
The eROSITA Final Equatorial-Depth Survey (eFEDS). Identification and characterization of the counterparts to point-like sources
Finoguenov, A.; Georgakakis, A.; Salvato, M. +40 more
Context. In November 2019, eROSITA on board of the Spektrum-Roentgen-Gamma (SRG) observatory started to map the entire sky in X-rays. After the four-year survey program, it will reach a flux limit that is about 25 times deeper than ROSAT. During the SRG performance verification phase, eROSITA observed a contiguous 140 deg2 area of the s…
The MeerKAT Galaxy Cluster Legacy Survey. I. Survey Overview and Highlights
Tasse, C.; Heywood, I.; Camilo, F. +148 more
MeerKAT's large number (64) of 13.5 m diameter antennas, spanning 8 km with a densely packed 1 km core, create a powerful instrument for wide-area surveys, with high sensitivity over a wide range of angular scales. The MeerKAT Galaxy Cluster Legacy Survey (MGCLS) is a programme of long-track MeerKAT L-band (900−1670 MHz) observations of 115 galaxy…
The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
Strauss, Michael A.; Takita, Satoshi; Miyatake, Hironao +15 more
We present the galaxy shear catalog that will be used for the three-year cosmological weak gravitational lensing analyses using data from the Wide layer of the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) Survey. The galaxy shapes are measured from the i-band imaging data acquired from 2014 to 2019 and calibrated with image simulations t…
The Planck clusters in the LOFAR sky. I. LoTSS-DR2: New detections and sample overview
Simionescu, A.; Zhang, X.; Di Gennaro, G. +23 more
Context. Relativistic electrons and magnetic fields permeate the intra-cluster medium (ICM) and manifest themselves as diffuse sources of synchrotron emission observable at radio wavelengths, namely radio halos and radio relics. Although there is broad consensus that the formation of these sources is connected to turbulence and shocks in the ICM, …
The Radius of PSR J0740+6620 from NICER with NICER Background Estimates
Remillard, Ronald A.; Bogdanov, Slavko; Salmi, Tuomo +15 more
We report a revised analysis for the radius, mass, and hot surface regions of the massive millisecond pulsar PSR J0740+6620, studied previously with joint fits to NICER and XMM-Newton data by Riley et al. (2021) and Miller et al. (2021). We perform a similar Bayesian estimation for the pulse-profile model parameters, except that instead of fitting…