285 citations · 1.4k across the 38 of their papers we have counts for
30 papers · 1 filter
AESOPUS 2.0: Low-Temperature Opacities with Solid Grains
P. Marigo, P. Woitke, E. Tognelli +3
In this study we compute the equation of state and Rosseland mean opacity from temperatures of T~30000 K down to T~400 K, pushing the capabilities of the AESOPUS code (Marigo et al…
New calibrated models for the TRGB luminosity and a thorough analysis of theoretical uncertainties
Ippocratis D. Saltas, Emanuele Tognelli
The luminosity of the Tip of the Red Giant Branch (TRGB) is instrumental for the construction of the distance ladder, and its accurate modelling is key for determining the local Hu…
Gaia-ESO Survey: Role of magnetic activity and starspots on pre-main sequence lithium evolution
E. Franciosini, E. Tognelli, S. Degl'Innocenti +24
Pre-main sequence models with inflated radii are needed to simultaneously reproduce the colour-magnitude diagram and the lithium depletion pattern in young open clusters. We tested…
The Gaia-ESO Survey: Membership probabilities for stars in 63 open and 7 globular clusters from 3D kinematics
R. J. Jackson, R. D. Jeffries, N. J. Wright +26
Spectroscopy from the final internal data release of the Gaia-ESO Survey (GES) has been combined with Gaia EDR3 to assign membership probabilities to targets observed towards 63 Ga…
Theoretical predictions of surface light element abundances in protostellar and pre-Main Sequence phase
E. Tognelli, S. Degl'Innocenti, P. G. Prada Moroni +5
Theoretical prediction of surface stellar abundances of light elements -- lithium, beryllium, and boron -- represents one of the most interesting open problems in astrophysics. As…
The Gaia-ESO survey: Mixing processes in low-mass stars traced by lithium abundance in cluster and field stars
L. Magrini, N. Lagarde, C. Charbonnel +42
We aim to constrain the mixing processes in low-mass stars by investigating the behaviour of the Li surface abundance after the main sequence. We take advantage of the data from th…
On the Metamorphosis of the Bailey diagram for RR Lyrae stars
G. Bono, V. F. Braga, J. Crestani +37
We collected over 6000 high-resolution spectra of four dozen field RR Lyrae (RRL) variables pulsating either in the fundamental (39 RRab) or in the first overtone (9 RRc) mode. We…
Protostellar accretion in low mass metal poor stars and the cosmological lithium problem
E. Tognelli, P. G. Prada Moroni, S. Degl'Innocenti +2
The cosmological lithium problem, that is, the discrepancy between the lithium abundance predicted by the Big Bang nucleosynthesis and the one observed for the stars of the 'Spite…
Protostellar accretion and the cosmological lithium problem
S. Cassisi, M. Salaris, S. Degl'Innocenti +2
The cosmological lithium problem, i.e. the discrepancy between the lithium abundance predicted by the Big Bang Nucleosynthesis and the one observed for the stars of the "Spite plat…
Evidence of a substellar companion to AB Dor C
J. B. Climent, J. P. Berger, J. C. Guirado +5
Studies of fundamental parameters of very low-mass objects are indispensable to provide tests of stellar evolution models that are used to derive theoretical masses of brown dwarfs…
The Gaia-ESO Survey: The inner disc, intermediate-age open cluster Pismis 18
D. Hatzidimitriou, E. V. Held, E. Tognelli +34
Pismis 18 is a moderately populated, intermediate-age open cluster located within the solar circle at a Galactocentric distance of about 7 kpc. Few open clusters have been studied…
When the tale comes true: multiple populations and wide binaries in the Orion Nebula Cluster
Tereza Jerabkova, Giacomo Beccari, Henri M. J. Boffin +5
The high-quality OmegaCAM photometry of the 3x3 deg around the Orion Nebula Cluster (ONC) in r, and i filters by Beccari et al.(2017) revealed three well-separated pre-main sequenc…
The Gaia-ESO Survey: age spread in the star forming region NGC6530 from the HR diagram and gravity indicators
L. Prisinzano, F. Damiani, V. Kalari +33
In very young clusters, stellar age distribution is the empirical proof of the duration of star formation (SF) and of the physical mechanisms involved in the process. We derived ac…
unVEil the darknesS of The gAlactic buLgE (VESTALE)
G. Bono, M. Dall'Ora, M. Fabrizio +55
The main aim of this experiment is to provide a complete census of old (t > 10 Gyr, RR Lyrae, type II Cepheids, red horizontal branch), intermediate age (red clump, Miras) and youn…
Investigating the population of Galactic star formation regions and star clusters within a Wide-Fast-Deep Coverage of the Galactic Plane
L. Prisinzano, L. Magrini, F. Damiani +32
One of the aims of LSST is to perform a systematic survey of star clusters and star forming regions (SFRs) in our Galaxy. In particular, the observations obtained with LSST will ma…
Low mass star formation and subclustering in the HII regions RCW 32, 33 and 27 of the Vela Molecular Ridge. A photometric diagnostics to identify M-type stars
L. Prisinzano, F. Damiani, M. G. Guarcello +4
Most stars born in clusters and recent results suggest that star formation (SF) preferentially occurs in subclusters. Studying the morphology and SF history of young clusters is cr…
Theoretical uncertainties on the radius of low- and very-low mass stars
E. Tognelli, P. G. Prada Moroni, S. Degl'Innocenti
We performed an analysis of the main theoretical uncertainties that affect the radius of low- and very-low mass-stars predicted by current stellar models. We focused on stars in th…
On the RR Lyrae stars in globulars: V. the complete Near-Infrared (JHKs) census of omega Centauri RR Lyrae variables
V. F. Braga, P. B. Stetson, G. Bono +35
We present a new complete Near-Infrared (NIR, ) census of RR Lyrae stars (RRLs) in the globular Cen (NGC 5139). We collected 15,472 images with 4-8m class telesc…
The Gaia-ESO Survey: open clusters in Gaia-DR1 - a way forward to stellar age calibration
S. Randich, E. Tognelli, R. Jackson +42
We describe the methodologies that, taking advantage of Gaia-DR1 and the Gaia-ESO Survey data, enable the comparison of observed open star cluster sequences with stellar evolutiona…
On a new theoretical framework for RR Lyrae stars II: Mid--Infrared Period--Luminosity--Metallicity Relations
Jillian R. Neeley, Massimo Marengo, Giuseppe Bono +14
We present new theoretical period-luminosity-metallicity (PLZ) relations for RR Lyrae stars (RRL) at Spitzer and WISE wavelengths. The PLZ relations were derived using nonlinear, t…
Young, active radio stars in the AB Doradus moving group
R. Azulay, J. C. Guirado, J. M. Marcaide +5
Context. Precise determination of stellar masses is necessary to test the validity of pre-main-sequence (PMS) stellar evolutionary models, whose predictions are in disagreement wit…
The Gaia-ESO Survey: Structural and dynamical properties of the young cluster Chamaeleon I
G. G. Sacco, L. Spina, S. Randich +44
The young (~2 Myr) cluster Chamaeleon I is one of the closest laboratories to study the early stages of star cluster dynamics in a low-density environment. We studied its structura…
The Goldreich-Schubert-Fricke instability in stellar radiative zones
Andrea Caleo, Steven A. Balbus, Emanuele Tognelli
The Goldreich-Schubert-Fricke (GSF) instability is a rotational instability that is thought to contribute to the transfer of angular momentum in differentially rotating stars. It h…
Single stars in the Hyades open cluster. Fiducial sequence for testing stellar and atmospheric models
Taisiya G. Kopytova, Wolfgang Brandner, Emanuele Tognelli +4
Age and mass determinations for isolated stellar objects remain model-dependent. While stellar interior and atmospheric theoretical models are rapidly evolving, we need a powerful…