Search Publications
High turbulence in the IM Lup protoplanetary disk. Direct observational constraints from CN and C2H emission
Miotello, A.; van Dishoeck, E. F.; Bergin, E. A. +4 more
Context. Constraining turbulence in disks is key to understanding their evolution via the transport of angular momentum. Measurements of high turbulence remain elusive, and methods for estimating turbulence mostly rely on complex radiative transfer models of the data. Using the disk emission from IM Lup, a source proposed to be undergoing magneto-…
The GAPS programme at TNG. XLIX. TOI-5398, the youngest compact multi-planet system composed of an inner sub-Neptune and an outer warm Saturn
Baratella, M.; Pallé, E.; Scandariato, G. +68 more
Context. Short-period giant planets (P ≲ 10 days, Mp >0.1 MJ) are frequently found to be solitary compared to other classes of exo-planets. Small inner companions to giant planets with P ≲ 15 days are known only in five compact systems: WASP-47, Kepler-730, WASP-132, TOI-1130, and TOI-2000. Here, we report the confirmation…
Structures Of Dust and gAs (SODA): Constraining the innermost dust properties of II Zw96 with JWST observations of H2O and CO
Rigopoulou, D.; Efstathiou, A.; González-Alfonso, E. +4 more
We analyze JWST NIRSpec+MIRI/MRS observations of the infrared (IR) gas-phase molecular bands of the most enshrouded source (D1) within the interacting system and luminous IR galaxy II Zw 096. We report the detection of rovibrational lines of H2O ν2 = 1 − 0 (∼5.3-7.2 µm) and 12CO ν = 1 − 0 (∼4.45-4.95 µm…
An almost dark galaxy with the mass of the Small Magellanic Cloud
Trujillo, Ignacio; Karunakaran, Ananthan; Spekkens, Kristine +9 more
Almost dark galaxies are objects that have eluded detection by traditional surveys such as the Sloan Digital Sky Survey (SDSS). The low surface brightness of these galaxies (µr(0) > 26 mag arcsec−2), and hence their low surface stellar mass density (a few solar masses per pc2 or less), suggest that the ene…
Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley
Alonso, R.; Deleuil, M.; Erikson, A. +88 more
Context. TOI-732 is an M dwarf hosting two transiting planets that are located on the two opposite sides of the radius valley. Inferring a reliable demographics for this type of systems is key to understanding their formation and evolution mechanisms.
Aims: By doubling the number of available space-based observations and increasing the number…
The Sunburst Arc with JWST: I. Detection of Wolf-Rayet stars injecting nitrogen into a low-metallicity, z = 2.37 proto-globular cluster leaking ionizing photons
Dahle, H.; Rigby, J. R.; Bayliss, M. B. +13 more
We report the detection of a population of Wolf-Rayet (WR) stars in the Sunburst Arc, a strongly gravitationally lensed galaxy at redshift z = 2.37. As the brightest known lensed galaxy, the Sunburst Arc has become an important cosmic laboratory for studying star and cluster formation, Lyman α (Lyα) radiative transfer, and Lyman continuum (LyC) es…
Confronting sparse Gaia DR3 photometry with TESS for a sample of around 60 000 OBAF-type pulsators
Aerts, Conny; Hey, Daniel
Context. The Gaia mission has delivered hundreds of thousands of variable star light curves in multiple wavelengths. Recent work demonstrates that these light curves can be used to identify (non-)radial pulsations in OBAF-type stars, despite their irregular cadence and low light curve precision, of the order of a few millimagnitudes. With the cons…
The 33 M⊙ black hole Gaia BH3 is part of the disrupted ED-2 star cluster
Mazeh, T.; Caffau, E.; Cabrera-Ziri, I. +19 more
Context. The Gaia Collaboration has recently reported the detection of a 33 M⊙ black hole in a wide binary system located in the solar neighbourhood.
Aims: Here we explore the relationship between this black hole, known as Gaia BH3, and the nearby ED-2 halo stellar stream.
Methods: We studied the orbital characteristics of the…
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…