Zobrazeno 1 - 10
of 6 720
pro vyhledávání: '"Stanghellini, A."'
We explore the elemental abundances in Galactic planetary nebulae (PNe) compared with those of their stellar progenitors (Red Giant Branch and Asymptotic Giant Branch, RGB and AGB, stars), to explore and quantify the expected -- i.e., due to AGB evol
Externí odkaz:
http://arxiv.org/abs/2407.05780
Autor:
Stanghellini, C., Orienti, M., Spingola, C., Zanichelli, A., Dallacasa, D., Cassaro, P., O'Dea, C. P., Baum, S. A., Pérez-Torres, M.
The long-standing question concerning Jetted Sub-Galactic Size (JSS) radio sources is whether they will evolve into large radio galaxies, die before escaping the host galaxy, or remain indefinitely confined to their compact size. Our main goal is to
Externí odkaz:
http://arxiv.org/abs/2407.02029
Interval identification of natural effects in the presence of outcome-related unmeasured confounding
Autor:
Doretti, Marco, Stanghellini, Elena
With reference to a binary outcome and a binary mediator, we derive identification bounds for natural effects under a reduced set of assumptions. Specifically, no assumptions about confounding are made that involve the outcome; we only assume no unob
Externí odkaz:
http://arxiv.org/abs/2405.13621
Autor:
Tosi, Silvia, Dell'Agli, Flavia, Kamath, Devika, Stanghellini, Letizia, Ventura, Paolo, Bianchi, Stefano, Gómez-Muñoz, Marco A., García-Hernández, D. A.
Planetary nebulae (PNe) have three main components: a central star (CS), ionised gas and dust in the nebula. Each of them contains critical chemical fingerprints of their evolution, serving as tracers of the evolution, nucleosynthesis and dust produc
Externí odkaz:
http://arxiv.org/abs/2405.03640
Autor:
Fang, Xuan, Huang, Haomiao, Guerrero, Martin A., Stanghellini, Letizia, Garcia-Benito, Ruben, Lee, Ting-Hui, Zhang, Yong
We report spectroscopic surveys of planetary nebulae (PNe) in the Milky Way and Andromeda (M31), using the 10.4-m Gran Telescopio Canarias (GTC). The spectra are of high quality and cover the whole optical range, mostly from 3650 \r{A} to beyond 1 mi
Externí odkaz:
http://arxiv.org/abs/2402.10415
Autor:
Fitzpatrick, Michael, Placco, Vinicius, Bolton, Adam, Merino, Brian, Ridgway, Susan, Stanghellini, Letizia
The US National Gemini Office (US NGO), part of the Community Science and Data Center (CSDC) at NSF's NOIRLab, has completed a project to upgrade the IRAF-based Gemini reduction software to provide a fully supported system capable of running natively
Externí odkaz:
http://arxiv.org/abs/2401.01982
Autor:
Dell'Agli, F., Tosi, S., Kamath, D., Stanghellini, L., Bianchi, S., Ventura, P., Marini, E., García-Hernández, D. A.
We present a novel approach to address dust production by low- and intermediate-mass stars. We study the asymptotic giant branch (AGB) phase, during which the formation of dust takes place, from the perspective of post-AGB and planetary nebula (PN) e
Externí odkaz:
http://arxiv.org/abs/2310.03454
Autor:
Bucciarelli, B., Stanghellini, L.
Publikováno v:
A&A 680, A104 (2023)
We study the population of Galactic planetary Nebulae (PNe) and their central stars (CSs) through the analysis of their heliocentric distances and Galactic distribution. Distances are obtained by means of a revised statistical scale, based on an astr
Externí odkaz:
http://arxiv.org/abs/2309.10096
By exploiting the theory of skew-symmetric distributions, we generalise existing results in sensitivity analysis by providing the analytic expression of the bias induced by marginalization over an unobserved continuous confounder in a logistic regres
Externí odkaz:
http://arxiv.org/abs/2306.09969
Publikováno v:
Journal of Astronomical Telescopes, Instruments, and Systems, Volume 9, id. 017003 (2023)
This article presents an overview of the US National Gemini Office (US NGO) and its role within the International Gemini Observatory user community. Throughout the years, the US NGO charter changed considerably to accommodate the evolving needs of as
Externí odkaz:
http://arxiv.org/abs/2304.10657