Search Publications
The intracluster light on Frontier Fields clusters Abell 370 and Abell S1063
Jiménez-Teja, Yolanda; Dupke, Renato; de Oliveira, Nícolas O. L.
We analysed the contribution of the intracluster light (ICL) to the total luminosity of two massive galaxy clusters observed by the Hubble Space Telescope within the Frontier Fields program, Abell 370 (z ~ 0.375) and Abell S1063 (z ~ 0.348), in order to correlate it with the dynamical stage of these systems. We applied an algorithm based on the Ch…
A quantitative assessment of completeness correction methods and public release of a versatile simulation code
Treu, Tommaso; Trenti, Michele; Morishita, Takahiro +2 more
Having accurate completeness functions is crucial to the determination of the rest-frame ultraviolet luminosity functions (UVLFs) all the way back to the epoch of reionization. Most studies use injection-recovery simulations to determine completeness functions. Although conceptually similar, published approaches have subtle but important differenc…
Chemical evolution of 26Al and 60Fe in the Milky Way
Matteucci, F.; Spitoni, E.; Vasini, A.
We present theoretical mass estimates of 26Al and 60Fe throughout the Galaxy, performed with a numerical chemical evolution model including detailed nucleosynthesis prescriptions for stable and radioactive nuclides. We compared the results for several sets of stellar yields taken from the literature, for massive, low and inte…
Visual binary stars with known orbits in Gaia EDR3
Malkov, Oleg; Chulkov, Dmitry
A total of 3350 objects from the Sixth Catalog of Orbits of Visual Binary Stars (ORB6) are investigated to validate Gaia Early Data Release 3 (EDR3) parallaxes and provide mass estimates for the systems. We show that two-thirds of binaries with a separation of 0.2-0.5 arcsec are left without a parallax solution in EDR3. Special attention is paid t…
Luminosity distribution of Type II supernova progenitors
Rodríguez, Ósmar
I present progenitor luminosities (L) for a sample of 112 Type II supernovae (SNe II), computed directly from progenitor photometry and the bolometric correction technique, or indirectly from empirical correlations between progenitor luminosity and [${\rm O\, \small {I}}$] λλ6300, 6364 line luminosity at 350 d since explosion, 56Ni mass…
Planetesimals around stars with TESS (PAST) - II. An M dwarf 'dipper' star with a long-lived disc in the TESS continuous viewing zone
Gaidos, Eric; Mann, Andrew W.; Ansdell, Megan +6 more
Studies of T Tauri discs inform planet formation theory; observations of variability due to occultation by circumstellar dust are a useful probe of unresolved, planet-forming inner discs, especially around faint M dwarf stars. We report observations of 2M0632, an M dwarf member of the Carina young moving group that was observed by Transiting Exopl…
Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy - III. HH 514
Henney, W. J.; Méndez-Delgado, J. E.; García-Rojas, J. +1 more
We analyse the physical conditions and chemical composition of the photoionized Herbig-Haro object HH 514, which emerges from the protoplanetary disc (proplyd) 170-337 in the core of the Orion Nebula. We use high-spectral resolution spectroscopy from Ultraviolet and Visual Echelle Spectrograph at the Very Large Telescope and IFU-spectra from MEGAR…
The first seven months of the 2020 X-ray outburst of the magnetar SGR J1935+2154
Tiengo, A.; Mereghetti, S.; Rea, N. +10 more
The magnetar SGR J1935+2154 underwent a new active episode on 2020 April 27-28, when a forest of hundreds of X-ray bursts and a large enhancement of the persistent flux were detected. For the first time, a radio burst with properties similar to those of fast radio bursts and with a X-ray counterpart was observed from this source, showing that magn…
Ejection-accretion connection in NLS1 AGN 1H 1934-063
Cusumano, G.; Fabian, A. C.; Pinto, C. +7 more
Accretion and ejection of matter in active galactic nuclei (AGNs) are tightly connected phenomena and represent fundamental mechanisms regulating the growth of the central supermassive black hole and the evolution of the host galaxy. However, the exact physical processes involved are not yet fully understood. We present a high-resolution spectral …
Relic galaxy analogues in TNG50 simulation: the formation pathways of surviving red nuggets in a cosmological simulation
Chies-Santos, Ana L.; Ferreira, Leonardo; De Rossi, María Emilia +4 more
Relic galaxies are massive compact quiescent galaxies that formed at high-redshift and remained almost unchanged since then. In this work, we search for analogues to relic galaxies in the TNG50 cosmological simulations to understand relic formation and test the ability of TNG50 to reproduce such rare objects. Using stellar mass, age, radius, quies…