Search Publications
The fifth data release of the Kilo Degree Survey: Multi-epoch optical/NIR imaging covering wide and legacy-calibration fields
Hoekstra, Henk; Sifón, Cristóbal; Heymans, Catherine +51 more
We present the final data release of the Kilo-Degree Survey (KiDS-DR5), a public European Southern Observatory (ESO) wide-field imaging survey optimised for weak gravitational lensing studies. We combined matched-depth multi-wavelength observations from the VLT Survey Telescope and the VISTA Kilo-degree INfrared Galaxy (VIKING) survey to create a …
Cosmic hide and seek: The volumetric rate of X-ray quasi-periodic eruptions
Salvato, M.; Liu, Z.; Buchner, J. +6 more
Multiwavelength extragalactic nuclear transients, particularly those detectable as multi-messengers, are among the primary drivers for the next-generation observatories. X-ray quasi-periodic eruptions (QPEs) are the most recent and perhaps most peculiar addition to this group. Here, we report a first estimate of the volumetric rate of QPEs based o…
The ALMA Reionization Era Bright Emission Line Survey: The molecular gas content of galaxies at z 7
Inami, H.; De Looze, I.; Schneider, R. +19 more
A key to understanding the formation of the first galaxies is to quantify the content of the molecular gas as the fuel for star formation activity through the epoch of reionization. In this paper, we use the 158µm [C II] fine-structure emission line as a tracer of the molecular gas in the interstellar medium (ISM) in a sample of 𝓏 = 6.5-7.5 galaxi…
JWST detection of extremely excited outflowing CO and H2O in VV 114 E SW: A possible rapidly accreting IMBH
González-Alfonso, Eduardo; Pereira-Santaella, Miguel; Neufeld, David A. +3 more
Mid-infrared (mid-IR) gas-phase molecular bands are powerful diagnostics of the warm interstellar medium. We report the James Webb Space Telescope detection of the CO v = 1 − 0 (4.4 − 5.0 µm) and H2O ν2 = 1 − 0 (5.0 − 7.8 µm) ro-vibrational bands, both in absorption, toward the "s2" core in the southwest nucleus o…
JWST MIRI flight performance: Imaging
Temim, Tea; Gordon, Karl D.; Law, David R. +37 more
The Mid-Infrared Instrument (MIRI) aboard the James Webb Space Telescope (JWST) provides the observatory with a huge advance in mid-infrared imaging and spectroscopy covering the wavelength range of 5-28 µm. This paper describes the performance and characteristics of the MIRI imager as understood during observatory commissioning activities, and th…
GRB 180128A: A second magnetar giant flare candidate from the Sculptor Galaxy
Andreoni, Igor; Frederiks, Dmitry D.; Svinkin, Dmitry S. +14 more
Magnetars are slowly rotating neutron stars that possess the strongest magnetic fields known in the cosmos (1014 − 1015 G). They display a range of transient high-energy electromagnetic activity. The brightest and most energetic of these events are the gamma-ray bursts (GRBs) known as magnetar giant flares (MGFs), with isotro…
Geometric distortion and astrometric calibration of the JWST MIRI Medium Resolution Spectrometer
Law, David R.; Álvarez-Márquez, Javier; Vandenbussche, Bart +13 more
Context. The Medium Resolution integral field Spectrometer (MRS) of the Mid-Infrared Instrument (MIRI) on board the James Webb Space Telescope (JWST) performs spectroscopy between 5 and 28 µm, with a field of view varying from ~13 to ~56 sq. arcsec. The optics of the MRS introduce substantial distortion and this needs to be rectified in order to r…
The hierarchical formation of 30 Doradus as seen by JWST
Fahrion, Katja; De Marchi, Guido
The 30 Doradus region in the Large Magellanic Cloud (LMC) is the most energetic star-forming region in the Local Group. It is powered by the feedback from the massive stars in R 136, the 1-2 Myr old central massive cluster. 30 Doradus has therefore long been regarded as a laboratory for studying star and star cluster formation under conditions rem…
Evolution of the star formation rate and ΣSFR of galaxies at cosmic morning (4 < z < 10)
Kartaltepe, J. S.; Franco, M.; Dickinson, M. +28 more
The galaxy-integrated star formation rate (SFR) surface density measurement (ΣSFR) has been proposed as a valuable diagnostic of the mass accumulation in galaxies given it is more tightly related to the physics of star formation and stellar feedback than other indicators. In this work, we assembled a statistical sample of 230 galaxies o…
Asteroseismic modelling of fast rotators and its opportunities for astrophysics
Aerts, Conny; Tkachenko, Andrew
Rotation matters for the life of a star. It causes a multitude of dynamical phenomena in the stellar interior during a star's evolution, and its effects accumulate until the star dies. All stars rotate at some level, but most of those born with a mass higher than 1.3 times the mass of the Sun rotate rapidly during more than 90% of their nuclear li…