Zobrazeno 1 - 10
of 180
pro vyhledávání: '"Stanghellini, Letizia"'
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:
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
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
Autor:
De Marco, Orsola, Akashi, Muhammad, Akras, Stavros, Alcolea, Javier, Aleman, Isabel, Amram, Philippe, Balick, Bruce, De Beck, Elvire, Blackman, Eric G., Boffin, Henri M. J., Boumis, Panos, Bublitz, Jesse, Bucciarelli, Beatrice, Bujarrabal, Valentin, Cami, Jan, Chornay, Nicholas, Chu, You-Hua, Corradi, Romano L. M., Frank, Adam, Garcia-Segura, Guillermo, Garcia-Hernandez, D. A., Garcia-Rojas, Jorge, Gomez-Llanos, Veronica, Goncalves, Denise R., Guerrero, Martin A., Jones, David, Karakas, Amanda I., Kastner, Joel H., Kwok, Sun, Lykou, Foteini, Manchado, Arturo, Matsuura, Mikako, McDonald, Iain, Monreal-Ibero, Ana, Monteiro, Hektor, Baez, Paula Moraga, Morisset, Christophe, Miszalski, Brent, Mohamed, Shazrene S., Montez Jr., Rodolfo, Nordhaus, Jason, de Oliveira, Claudia Mendes, Osborn, Zara, Otsuka, Masaaki, Parker, Quentin A., Peeters, Els, Quint, Bruno C., Quintana-Lacaci, Guillermo, Redman, Matt, Ruiter, Ashley J., Sabin, Laurence, Contreras, Carmen Sanchez, Santander-Garcia, Miguel, Seitenzahl, Ivo, Sahai, Raghvendra, Soker, Noam, Speck, Angela K., Stanghellini, Letizia, Steffen, Wolfgang, Toala, Jesus A., Ueta, Toshiya, Van de Steene, Griet, Villaver, Eva, Ventura, Paolo, Vlemmings, Wouter, Walsh, Jeremy R., Wesson, Roger, van Winckel, Hans, Zijlstra, Albert A.
Publikováno v:
Nature Astronomy, 2022, Vol. 6, p. 1421
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the Sun. Here, we analyse James Webb Space Telescope (JWST) Early Release
Externí odkaz:
http://arxiv.org/abs/2301.02775
Autor:
Stanghellini, Letizia, Bushra, Rafia, Shaw, Richard A., dell'Agli, Flavia, Garcia-Hernandez, D. A., Ventura, Paolo
We surveyed a sample of compact Galactic planetary nebulae (PNe) with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope (HST/STIS) to determine their gas-phase carbon abundances. Carbon abundances in PNe constrain the nature of t
Externí odkaz:
http://arxiv.org/abs/2203.05636
We matched the astrometry of central stars (CSs) of spectroscopically-confirmed Galactic planetary nebulae (PNe) with DR2 Gaia parallaxes ($p$), finding 430 targets in common with $p>0$ and $|\sigma_{\rm p}/p|<1$. A catalog of PNe whose CSs have DR2
Externí odkaz:
http://arxiv.org/abs/1910.09680
Spiral star-forming galaxies are complex astrophysical objects whose baryonic component is dominated by the disk, where most of the star formation resides. The metallicity in the disk is not uniform, and it usually decreases with the distance to the
Externí odkaz:
http://arxiv.org/abs/1905.04096
Autor:
Ridgway, Stephen, Akeson, Rachel, Baines, Ellyn, Creech-Eakman, Michelle, Boyajian, Tabetha, De Beck, Elvire, Dupree, Andrea, Gies, Doug, Hinkle, Kenneth, Humphreys, Elizabeth, Humphreys, Roberta, Joyce, Richard, Matthews, Lynn, Monnier, John, Norris, Ryan, Roettenbacher, Rachael, Stanghellini, Letizia, Brumellaar, Theo ten, van Belle, Gerard, Vlemmings, Wouter, Wheeler, J Craig, White, Russell, Ziurys, Lucy
Evolved stars dominate galactic spectra, enrich the galactic medium, expand to change their planetary systems, eject winds of a complex nature, produce spectacular nebulae and illuminate them, and transfer material between binary companions. While do
Externí odkaz:
http://arxiv.org/abs/1903.05109