Search Publications
Modelling the secular evolution of protoplanetary disc dust sizes - a comparison between the viscous and magnetic wind case
Tabone, Benoît; Zagaria, Francesco; Rosotti, Giovanni P. +1 more
For many years, protoplanetary discs have been thought to evolve viscously: angular momentum redistribution leads to accretion and outward disc spreading. Recently, the hypothesis that accretion is due, instead, to angular momentum removal by magnetic winds gained new popularity: no disc spreading is expected in this case. In this paper, we run se…
Revisiting the evolved hypergiants in the Magellanic Clouds
Borges Fernandes, M.; Kraus, M.; Maravelias, G. +2 more
The massive stars that survive the phase of red supergiants (RSGs) spend the rest of their life in extremity. Their unstable atmospheres facilitate the formation and episodic ejection of shells that alter the stellar appearance and surroundings. In the present study, we revise the evolutionary state of eight hypergiants in the Magellanic Clouds, f…
The SN Ia runaway LP 398-9: detection of circumstellar material and surface rotation
Hermes, J. J.; Blouin, Simon; Zakamska, Nadia L. +12 more
A promising progenitor scenario for Type Ia supernovae (SNeIa) is the thermonuclear detonation of a white dwarf in a close binary system with another white dwarf. After the primary star explodes, the surviving donor can be spontaneously released as a hypervelocity runaway. One such runaway donor candidate is LP 398-9, whose orbital trajectory trac…
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…