284 citations · 1.2k across the 37 of their papers we have counts for
19 papers · 1 filter
The He abundance in NGC 1850 A and B: are we observing the early stage of formation of multiple populations in a stellar cluster?
R. Carini, A. Sollima, E. Brocato +1
We present the result of a sample of B-stars in the Large Magellanic Cloud young double stellar cluster NGC 1850 A and NGC 1850 B, observed with the integral-field spectrograph at…
The intense production of silicates during the final AGB phases of intermediate mass stars
E. Marini, F. Dell'Agli, D. Kamath +7
The formation of silicates in circumstellar envelopes of stars evolving through the AGB is still debated given the uncertainties affecting stellar evolution modelling, the descript…
Photometric and spectroscopic study of the EXor-like eruptive young star Gaia19fct
Sunkyung Park, Ágnes Kóspál, Péter Ábrahám +19
Gaia19fct is one of the Gaia-alerted eruptive young stars that has undergone several brightening events. We conducted monitoring observations using multi-filter optical and near-in…
Pre-main Sequence stars in LH91
R. Carini, K. Biazzo, G. De Marchi +3
We study the accretion properties of pre-main sequence low-mass stars in the LH 91 association within the Large Magellanic Clouds. Using optical multiband photometry obtained with…
EXORCISM: a spectroscopic survey of young eruptive variables (EXor and candidates)
T. Giannini, A. Giunta, M. Gangi +9
We present an optical/near-IR survey of 11 variable young stars (EXors and EXor candidates) aimed at deriving and monitoring their accretion properties. About 30 optical and near-i…
MUSE spectroscopic observations of the Young Massive Cluster NGC1850
A. Sollima, V. D'Orazi, R. Gratton +4
NGC1850 is the nearest Young Massive Cluster of the Local Group with a mass similar to those of Galactic globular clusters. Recent studies have revealed an extended morphology of i…
MUSE observations of NGC330 in the Small Magellanic Cloud. Helium abundance of bright main sequence stars
R. Carini, K. Biazzo, E. Brocato +2
We present observations of the most bright main sequence stars in the Small Magellanic Cloud stellar cluster NGC330 obtained with the integral field spectrograph MUSE@VLT. The use…
A new insight into the V1184 Tau variability
T. Giannini, D. Lorenzetti, A. Harutyunyan +5
V1184 Tau is a young variable for long time monitored at optical wavelengths. Its variability has been ascribed to a sudden and repetitive increase of the circumstellar extinction…
The Cepheids of NGC1866: A Precise Benchmark for the Extragalactic Distance Scale and Stellar Evolution from Modern UBVI Photometry
I. Musella, M. Marconi, P. B. Stetson +8
We present the analysis of multiband time-series data for a sample of 24 Cepheids in the field of the Large Magellanic Cloud cluster NGC1866. Very accurate BVI VLT photometry is co…
Photometric and spectroscopic study of the intermediate-age open cluster NGC 2355
P. Donati, A. Bragaglia, E. Carretta +4
In this paper we analyse the evolutionary status and properties of the old open cluster NGC 2355, located in the Galactic anticentre direction, as a part of the long term programme…
The absolute age of the globular cluster M15 using near-infrared adaptive optics images from PISCES/LBT
M. Monelli, V. Testa, G. Bono +26
We present deep near-infrared (NIR) J, Ks photometry of the old, metal-poor Galactic globular cluster M\,15 obtained with images collected with the LUCI1 and PISCES cameras availab…
Stellar-Encounter Driven Red-Giant Star Mass-Loss in Globular Clusters
M. Pasquato, A. de Luca, G. Raimondo +5
Globular Cluster (GC) Color-Magnitude Diagrams (CMDs) are reasonably well understood in terms of standard stellar-evolution. However, there are still some open issues, such as full…
Multipopulation aftereffects on the color-magnitude diagram and Cepheid variables of young stellar systems
R. Carini, E. Brocato, M. Marconi +1
Context: The evidence of a multipopulation scenario in Galactic globular clusters raises several questions about the formation and evolution of the two (or more) generations of sta…
Yields of AGB and SAGB models with chemistry of low- and high-metallicity Globular Clusters
P. Ventura, M. Di Criscienzo, R. Carini +1
We present yields from stars of mass in the range Mo<M<8Mo of metallicities Z=0.0003 and Z=0.008, thus encompassing the chemistry of low- and high-Z Globular Clusters. The yields a…
Super AGB and AGB evolution and the chemical inventory in NGC 2419
Paolo Ventura, Francesca D'Antona, Marcella Di Criscienzo +3
We follow the scenario of formation of second generation stars in globular clusters by matter processed by hot bottom burning (HBB) in massive asymptotic giant branch (AGB) stars a…
Dust formation around AGB and SAGB stars: a trend with metallicity?
P. Ventura, M. Di Criscienzo, R. Schneider +6
We calculate the dust formed around AGB and SAGB stars of metallicity Z=0.008 by following the evolution of models with masses in the range 1M<M<8M throughthe thermal pulses phase,…
The transition from carbon dust to silicates production in low-metallicity AGB and SAGB stars
P. Ventura, M. Di Criscienzo, R. Schneider +6
We compute the mass and composition of dust produced by stars with masses in the range 1Msun<M<8 Msun and with a metallicity of Z=0.001 during their AGB and Super AGB phases. Stell…
A deep insight into the Mg-Al nucleosynthesis in massive AGBs and SAGB stars
Paolo Ventura, Roberta Carini, Francesca D'Antona
The stars in globular clusters are known to differ in their surface chemistry: the spectroscopic investigations in the last decades outlined the presence of star-to-star difference…
NGC 2419: a large and extreme second generation in a currently undisturbed cluster
M. Di Criscienzo, F. D'Antona, A. P. Milone +6
We analyse complementary HST and SUBARU data for the globular cluster NGC 2419. We make a detailed analysis of the horizontal branch (HB), that appears composed by two main groups…