Search Publications
A first look at spatially resolved star formation at 4.8 < z < 6.5 with JWST FRESCO NIRCam slitless spectroscopy
Matharu, Jasleen; Chisholm, John; Shivaei, Irene +19 more
We present the first results on the spatial distribution of star formation in 454 star-forming galaxies just after the epoch of reionisation (4.8 < z < 6.5) using Hα emission-line maps and F444W imaging that traces the stellar continuum from the JWST FRESCO NIRCam Slitless Spectroscopy Survey. The Hα equivalent width profiles of star-forming…
The SRG/eROSITA All-Sky Survey. SRG/eROSITA cross-calibration with Chandra and XMM-Newton using galaxy cluster gas temperatures
Zhang, X.; Pacaud, F.; Ramos-Ceja, M. E. +17 more
Galaxy cluster gas temperatures (T) play a crucial role in many cosmological and astrophysical studies. However, it has been shown that T measurements can significantly vary between different X-ray telescopes. These T biases can propagate to several cluster applications in which T can be used, such as measuring hydrostatic cluster masses and const…
Statistical study of a large and cleaned sample of ultraluminous and hyperluminous X-ray sources
Godet, Olivier; Tranin, Hugo; Webb, Natalie +1 more
Context. Ultraluminous and hyperluminous X-ray (ULX and HLX) sources could constitute interesting laboratories to further improve our understanding of the supermassive black hole growth through super-Eddington accretion episodes and successive mergers of lighter holes. ULXs are thought to be powered by super-Eddington accretion onto stellar-mass c…
Exploring a primordial solution for early black holes detected with JWST
Dayal, Pratika
Aims. With its rest-frame optical sensitivity, the James Webb Space Telescope (JWST) has unearthed black holes as massive as 106.2‑8.1 M⊙ at redshifts of z ∼ 8.5 ‑ 10.6. In addition to these unexpectedly high masses, many systems show unexpectedly high ratios of the black hole to stellar mass of MBH/M* ≳…
ALMA survey of a massive node of the Cosmic Web at z ∼ 3. I. Discovery of a large overdensity of CO emitters
Wang, W.; Ginolfi, M.; Fossati, M. +12 more
Submillimeter surveys toward overdense regions in the early Universe are essential for uncovering the obscured star formation and the cold gas content of assembling galaxies within massive dark matter halos. In this work, we present deep ALMA mosaic observations covering an area of ∼2'×2' around MUSE Quasar Nebula 01 (MQN01), one of the largest an…
The SRG/eROSITA all-sky survey. Identifying the coronal content with HamStar
Schmitt, J. H. M. M.; Salvato, M.; Czesla, S. +6 more
Context. The first eROSITA all-sky survey (eRASS1) performed on board the Spectrum-Roentgen-Gamma mission (SRG) provides more than 900 000 X-ray sources in the 0.2-2.3 keV band located in the western hemisphere.
Aims: We present identifications of the eRASS1 sources obtained using our HamStar method, which was designed for the identification …
Strong size evolution of disc galaxies since z = 1. Readdressing galaxy growth using a physically motivated size indicator
Trujillo, Ignacio; Buitrago, Fernando
Our understanding of how the size of galaxies has evolved over cosmic time is based on the use of the half-light (effective) radius as a size indicator. Although the half-light radius has many advantages for structurally parameterising galaxies, it does not provide a measure of the global extent of the objects, but only an indication of the size o…
CHEOPS in-flight performance. A comprehensive look at the first 3.5 yr of operations
Guterman, P.; Alonso, R.; Deleuil, M. +128 more
Context. Since the discovery of the first exoplanet almost three decades ago, the number of known exoplanets has increased dramatically. By beginning of the 2000s it was clear that dedicated facilities to advance our studies in this field were needed. The CHaracterising ExOPlanet Satellite (CHEOPS) is a space telescope specifically designed to mon…
Ubiquitous radio emission in quasars: Predominant AGN origin and a connection to jets, dust, and winds
Prandoni, I.; Alexander, D. M.; Hardcastle, M. J. +16 more
We present a comprehensive study of the physical origin of radio emission in optical quasars at redshifts z < 2.5. We focus particularly on the associations between compact radio emission, dust reddening, and outflows identified in our earlier work. Leveraging the deepest low-frequency radio data available to date (LoTSS Deep DR1), we achieve r…
A portrait of the vast polar structure as a young phenomenon: Hints from its member satellites
Steinmetz, M.; Taibi, S.; Khoperskov, S. +2 more
Context. It has been observed that several Milky Way (MW) satellite dwarf galaxies are distributed along a coherent planar distribution known as the vast polar structure (VPOS).
Aims: Here we investigate whether MW satellites located on the VPOS have different physical and orbital properties from those not associated with it.
Methods: Us…