Search Publications
Observational signatures of the dust size evolution in isolated galaxy simulations
Matsumoto, Kosei; De Looze, Ilse; Baes, Maarten +9 more
Aims. We aim to provide observational signatures of the dust size evolution in the interstellar medium. In particular, we explore indicators of the polycyclic aromatic hydrocarbon (PAH) mass fraction (qPAH), defined as the mass fraction of PAHs relative to the total dust grains. In addition, we validate our dust evolution model by compa…
Long term variability of Cygnus X-1. VIII. A spectral-timing look at low energies with NICER
Ingram, Adam; Steiner, James F.; Grinberg, Victoria +19 more
The Neutron Star Interior Composition Explorer (NICER) monitoring campaign of Cyg X-1 allows us to study its spectral-timing behavior at energies < 1 keV across all states. The hard state power spectrum can be decomposed into two main broad Lorentzians with a transition at around 1 Hz. The lower-frequency Lorentzian is the dominant component at…
A3COSMOS: Dust mass function and dust mass density at 0.5 < z < 6
Magnelli, B.; Pozzi, F.; Feltre, A. +7 more
Context. Although dust in galaxies represents only a few percent of the total baryonic mass, it plays a crucial role in the physical processes occurring in galaxies. Studying the dust content of galaxies, particularly at high z, is therefore crucial for understanding the link between dust production, obscured star formation, and the build-up of ga…
The most stringent upper limit set on the mass of a central black hole in 47 Tucanae using dynamical models
Dalessandro, E.; Giunchi, E.; Cignoni, M. +3 more
Globular clusters (GCs) have been proposed as promising sites for discovering intermediate-mass black holes (IMBHs), offering the possibility to gain crucial insights into the formation and evolution of these elusive objects. The Galactic GC 47 Tucanae (also known as NGC 104) has been suggested as a potential IMBH host, yet previous studies have y…
TOI-5005 b: A super-Neptune in the savanna near the ridge
Bouchy, F.; Winn, J. N.; Moya, A. +38 more
Context. The Neptunian desert and savanna have recently been found to be separated by a ridge, an overdensity of planets in the period range of ≃3–5 days. These features are thought to be shaped by dynamical and atmospheric processes. However, their roles are not yet well understood. Aims. Our aim was to confirm and characterize the super-Neptune …
A3COSMOS: Measuring the cosmic dust-attenuated star formation rate density at 4 < z < 5
Daddi, Emanuele; Schinnerer, Eva; Oesch, Pascal +14 more
Context. In recent years, conflicting results have provided an uncertain view of the dust-attenuated star-forming properties of z ≳ 4 galaxies.
Aims: To solve this, we need to accurately measure the mean dust-attenuated properties of star-forming galaxies (SFGs) at 4 < z < 5 and therefore constrain the cosmic dust-attenuated star format…
Evolution of the relation between the mass accretion rate and the stellar and disk mass from brown dwarfs to stars
Bayo, A.; Testi, L.; Alcalá, J. M. +7 more
The time evolution of the dependence of the mass accretion rate with the stellar mass and the disk mass represents a fundamental way to understand the evolution of protoplanetary disks and the formation of planets. In this work, we present observations with X-shooter of 26 Class II very low-mass stars (< 0.2 M⊙) and brown dwarfs in t…
Fast supermassive black hole growth in the SPT2349–56 protocluster at z = 4.3
Ivison, R. J.; Lehmer, B. D.; Brandt, W. N. +7 more
Context. Large-scale environment is one of the main physical drivers of galaxy evolution. The densest regions at high redshifts (i.e. z > 2 protoclusters) are gas-rich regions characterised by high star formation activity. The same physical properties that enhance star formation in protoclusters are also thought to boost the growth of supermass…
Evidence of apsidal motion and a possible co-moving companion star detected in the WASP-19 system
Rauer, H.; Gandolfi, D.; Csizmadia, Sz. +5 more
Context. Love numbers measure the reaction of a celestial body to perturbing forces, such as the centrifugal force caused by rotation, or tidal forces resulting from the interaction with a companion body. These parameters are related to the interior density profile. The non-point mass nature of the host star and a planet orbiting around each other…
AMICO-COSMOS galaxy cluster and group catalogue up to z = 2: Sample properties and X-ray counterparts
Finoguenov, A.; Castignani, G.; Moscardini, L. +2 more
Aims: We present the results of a new galaxy cluster search in the COSMOS field obtained using the Adaptive Matched Identifier of Clustered Objects (AMICO). Our aim was to produce a new cluster and group catalogue up to z = 2 by performing an innovative application of AMICO with respect to previous successful applications to wide-field survey…