Zobrazeno 1 - 10
of 157
pro vyhledávání: '"Abate, Carlo"'
Autor:
Abate, Carlo, Bianchi, Filippo Maria
We propose a novel approach to compute the MAXCUT in attributed graphs, i.e., graphs with features associated with nodes and edges. Our approach is robust to the underlying graph topology and is fully differentiable, making it possible to find soluti
Externí odkaz:
http://arxiv.org/abs/2409.05100
Akademický článek
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Publikováno v:
A&A 620, A63 (2018)
The chemical enrichments detected in CEMP-$s$ stars are believed to be the consequence of a mass-transfer episode from a now extinct AGB primary star. This hypothesis is borne out by the fact that most CEMP-$s$ stars exhibit RV variations suggesting
Externí odkaz:
http://arxiv.org/abs/1809.10157
Autor:
Gull, Maude, Frebel, Anna, Cain, Madelyn G., Placco, Vinicius M., Ji, Alexander P., Abate, Carlo, Ezzeddine, Rana, Karakas, Amanda I., Hansen, Terese T., Sakari, Charli, Holmbeck, Erika M., Santucci, Rafael M., Casey, Andrew R., Beers, Timothy C.
We present a high-resolution (R~35,000), high signal-to-noise (S/N>200) Magellan/MIKE spectrum of the star RAVE J094921.8-161722, a bright (V=11.3) metal-poor red giant star with [Fe/H] = -2.2, identified as a carbon-enhanced metal-poor (CEMP) star f
Externí odkaz:
http://arxiv.org/abs/1806.00645
Publikováno v:
The Astrophysical Journal, 846, 117 (2017)
A large fraction of stars in binary systems are expected to undergo mass and angular momentum exchange at some point in their evolution, which can drastically alter the chemical and dynamical properties and fates of the systems. Interaction by stella
Externí odkaz:
http://arxiv.org/abs/1708.03639
Autor:
Abate, Carlo
Type Ia supernovae (SNe Ia) are thermonuclear explosions of carbon-oxygen white dwarfs (WDs) that accrete mass from a binary companion, which can be either a non-degenerate star (a main-sequence star or a giant) or an other WD in a binary merger (sin
Externí odkaz:
http://arxiv.org/abs/1707.07988
Publikováno v:
A&A 587, A50 (2016)
CEMP-$r/s$ stars are metal-poor stars with enhanced abundances of carbon and heavy elements associated with the slow ($s$-) and rapid ($r$-) neutron-capture process. It is believed that carbon and $s$-elements were accreted from the wind of an AGB pr
Externí odkaz:
http://arxiv.org/abs/1601.00976
Autor:
Placco, Vinicius M., Beers, Timothy C., Ivans, Inese I., Filler, Dan, Imig, Julie A., Roederer, Ian U., Abate, Carlo, Hansen, Terese, Cowan, John J., Frebel, Anna, Lawler, James E., Schatz, Hendrik, Sneden, Christopher, Sobeck, Jennifer S., Aoki, Wako, Smith, Verne V., Bolte, Michael
We present an elemental-abundance analysis, in the near-ultraviolet (NUV) spectral range, for the bright carbon-enhanced metal-poor (CEMP) stars HD196944 (V = 8.40, [Fe/H] = -2.41) and HD201626 (V = 8.16, [Fe/H] = -1.51), based on data acquired with
Externí odkaz:
http://arxiv.org/abs/1508.05872
Type Iax supernovae (SNe Iax) are proposed as one new sub-class of SNe Ia since they present observational properties that are sufficiently distinct from the bulk of SNe Ia. SNe Iax are the most common of all types of peculiar SNe by both number and
Externí odkaz:
http://arxiv.org/abs/1506.04903
CEMP-s stars are very metal-poor stars with enhanced abundances of carbon and s-process elements. They form a significant proportion of the very metal-poor stars in the Galactic halo and are mostly observed in binary systems. This suggests that the o
Externí odkaz:
http://arxiv.org/abs/1310.6859