activity
19992026
most citedDetecting Galaxy Groups and AGNs populating the local Universe in the eROSITA era

20 citations · 101 across the 13 of their papers we have counts for

collaborators

14 papers

astro-ph.GA2026

The incidence of eROSITA X-ray AGN in the local Universe: from dwarf to massive galaxies

Z. Igo, A. Merloni, A. Georgakakis +22

Combining deep, wide-area X-ray surveys with multi-wavelength catalogues provides insights into rare, highly-accreting AGN and low-mass galaxies at low redshift, the latter potenti…

astro-ph.SR2026

Cataclysmic variables from SRG/eROSITA: new systems from eRASS1

A. D. Schwope, J. Brink, D. A. H. Buckley +12

(abridged) Aims. We aim to generate large samples of CVs selected from the SRG/eROSITA surveys to address fundamental questions about binary evolution, the role of magnetic fields…

astro-ph.GA2026

A Changing-Look Seyfert Discovered by eROSITA Reveals a Two-Component Broad-Line Region

Alex Markowitz, Mirko Krumpe, David Homan +12

Extreme sudden changes in the flow of accreting gas onto SMBHs manifest themselves via large-amplitude continuum variability and changes to broad Balmer emission profiles, driving…

astro-ph.GA2026★ 2 cited

CIV wind properties of the SDSS-V X-ray selected quasars: strong optical-to-UV emission is key regardless of X-ray strength

Amy L. Rankine, David Homan, James Aird +25

We present an investigation of the rest-frame optical/UV and X-ray properties for a sample of 3027 X-ray selected quasars between detected in the deepest Spec…

astro-ph.HE2025★ 12 cited

Counterpart identification and classification for eRASS1 and characterisation of the AGN content

M. Salvato, J. Wolf, T. Dwelly +44

[abridged] Accurately accounting for the AGN phase in galaxy evolution requires a large, clean AGN sample. This is now possible with SRG/eROSITA. The public Data Release 1 (DR1, Ja…

astro-ph.HE2025★ 2 cited

Searching for supermassive black holes binaries within SRG/eROSITA-De I: Properties of the X-ray selected candidates

D. Tubín-Arenas, M. Krumpe, D. Homan +20

Abridged: Supermassive black hole binaries (SMBHBs) separated by (sub)-pc scales represent one of the latest stages of hierarchical galaxy assembly. However, many of these objects…

astro-ph.GA2025★ 4 cited

The eROSITA view on the halo mass-temperature relation: From low-mass groups to massive clusters

V. Toptun, P. Popesso, I. Marini +15

Galaxy groups and clusters are among the best probes of structure formation and growth in a cosmological context. Most of their baryonic component is dominated by the intracluster…

astro-ph.GA2025★ 4 cited

The First SRG/eROSITA All-Sky Survey. Characterization of clusters of galaxies misclassified in the eRASS1 point source catalog

F. Balzer, E. Bulbul, M. Kluge +20

The detection of the extended X-ray-emission of the intracluster medium by the first SRG/eROSITA All-Sky Survey (eRASS1), combined with optical and near-infrared follow-up, resulte…

astro-ph.GA2024★ 10 cited

Average X-ray properties of galaxy groups. From Milky Way-like halos to massive clusters

P. Popesso, I. Marini, K. Dolag +20

This study examines the average X-ray properties of massive halos at z< 0.2, covering the largest halo mass range to date, from Milky Way-like halos to massive clusters. The analys…

astro-ph.GA2024★ 11 cited

The hot gas mass fraction in halos. From Milky Way-like groups to massive clusters

P. Popesso, A. Biviano, I. Marini +21

By using eROSITA data in the eFEDS area, we provide a measure of the hot gas fraction vs. halo mass relation over the largest halo mass range, from Milky Way-sized halos to massive…

astro-ph.GA2024★ 7 cited

The perils of stacking optically selected groups in eROSITA data. The Magneticum perspective

P. Popesso, I. Marini, K. Dolag +23

Hydrodynamical simulation predictions are often compared with observational data without fully accounting for systematics and biases specific to observational techniques. Using the…

astro-ph.GA2024★ 14 cited

Detecting clusters and groups of galaxies populating the local Universe in large optical spectroscopic surveys

I. Marini, P. Popesso, K. Dolag +13

Wide-field cosmological surveys provide hundreds of thousands of spectroscopically confirmed galaxy groups and clusters, valuable for tracing baryonic matter distribution. However,…

astro-ph.CO2024★ 20 cited

Detecting Galaxy Groups and AGNs populating the local Universe in the eROSITA era

I. Marini, P. Popesso, G. Lamer +14

The eROSITA will deliver an unprecedented volume of X-ray survey observations, 20-30 times more sensitive than ROSAT in the soft band (0.5-2 keV) and for the first time imaging in…

astro-ph1999★ 15 cited

The unusual host galaxy of the BL Lac object PKS 1413+135

G. Lamer, A. M. Newsam, I. M. McHardy

The BL Lacertae object PKS 1413+135 is associated with a disk dominated galaxy which heavily absorbs the BL Lac nucleus at optical and X-ray wavelengths. It has been argued whether…