8 papers
An X-ray-Emitting Proto-Cluster at Reveals Rapid Structure Growth
Akos Bogdan, Gerrit Schellenberger, Qiong Li +1
Galaxy clusters are the most massive gravitationally bound structures in the universe and serve as tracers of the assembly of large-scale structure. Studying their progenitors, pro…
X-ray properties of massive compact relic galaxies
Orsolya E. Kovacs, Norbert Werner, Akos Bogdan +1
We present the X-ray analysis of seven local compact elliptical galaxies (cEGs), selected for their morphological resemblance to high-redshift red nuggets. As likely descendants of…
25 Years of Groundbreaking Discoveries with Chandra
Patrick Slane, Ãkos Bogdán, David Pooley
The Chandra X-ray Observatory is a mainstay of modern observational astrophysics. With the highest angular resolution of any X-ray facility, its imaging and spectral capabilities i…
Chandra Rules Out Super-Eddington Accretion Models For Little Red Dots
Andrea Sacchi, Akos Bogdan
One of the most puzzling discoveries by JWST is the population of high-redshift, red, and compact galaxies dubbed little red dots (LRDs). Based on broad-line diagnostics, these gal…
Detection of Anisotropies in the Circumgalactic Medium of Disk Galaxies: Supermassive Black Hole Activity or Star Formation-driven Outflows?
Andrea Sacchi, Akos Bogdan, Nhut Truong
Gamma and X-ray observatories have revealed spectacular structures in the emission of the tenuous hot gas surrounding the Milky Way (MW), known as the Fermi and eROSITA bubbles. Ga…
Cosmology and Astrophysics with the Diffuse eRASS1 X-ray Angular Power Spectrum
Erwin T. Lau, Ãkos Bogdán, Daisuke Nagai +2
The recent tension in the value of the cosmological parameter , which represents the amplitude of the matter density fluctuations of the universe,…