Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Pérez-Villegas, A."'
Autor:
Lais Borbolato, Hélio D. Perottoni, Silvia Rossi, Guilherme Limberg, Angeles Pérez-Villegas, Friedrich Anders, Teresa Antoja, Chervin F. P. Laporte, Helio J. Rocha-Pinto, Rafael M. Santucci
Publikováno v:
The Astrophysical Journal, Vol 960, Iss 1, p 52 (2023)
We explore the kinematic and chemical properties of the Monoceros stellar overdensity by combining data from the Two Micron All Sky Survey, Wide-field Infrared Survey Explorer, APOGEE, and Gaia. Monoceros is a structure located toward the Galactic an
Externí odkaz:
https://doaj.org/article/6f92e638424c4ad091b4d9cfc06d8746
Autor:
Yuri Abuchaim, Hélio D. Perottoni, Silvia Rossi, Guilherme Limberg, Angeles Pérez-Villegas, Rafael M. Santucci, Vinicius M. Placco, João V. Sales-Silva, Friedrich Anders, Helio J. Rocha-Pinto
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 2, p 48 (2023)
We present a chemodynamical study of the Triangulum–Andromeda overdensity (TriAnd) employing a sample of 31 candidate stars observed with the GRACES high-resolution ( R = 40,000) spectrograph at the Gemini North (8.1 m) telescope. TriAnd is a stell
Externí odkaz:
https://doaj.org/article/9cd575f123344d88baed857db902d30e
Autor:
Guilherme Limberg, Anna B. A. Queiroz, Hélio D. Perottoni, Silvia Rossi, João A. S. Amarante, Rafael M. Santucci, Cristina Chiappini, Angeles Pérez-Villegas, Young Sun Lee
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 66 (2023)
In this work, we study the phase-space and chemical properties of the Sagittarius (Sgr) stream, the tidal tails produced by the ongoing destruction of the Sgr dwarf spheroidal (dSph) galaxy, focusing on its very metal-poor (VMP; [Fe/H] < −2) conten
Externí odkaz:
https://doaj.org/article/132efa697c1641cd93028d77629e1dd5
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 504:5919-5926
We performed test-particle simulations of a spiral late-type-like galaxy to study the radial migration in a steady potential. Our model includes a bulge, a disc, a dark matter halo, and spiral arms represented by a cosine potential. We varied the str
Autor:
Eduardo Luiz Damiani Bica, Cristina Chiappini, Marica Valentini, Stefano O. Souza, Sergio Ortolani, Domenico Nardiello, Angeles Pérez-Villegas, Beatriz Barbuy, Friedrich Anders, Bruno Dias
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2021, 656, 22 pp. ⟨10.1051/0004-6361/202141768⟩
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
instname
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2021, 656, 22 pp. ⟨10.1051/0004-6361/202141768⟩
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
[Context] Palomar 6 (Pal6) is a moderately metal-poor globular cluster projected towards the Galactic bulge. A full analysis of the cluster can give hints on the early chemical enrichment of the Galaxy and a plausible origin of the cluster. [Aims] Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a9a663142d3ec2955521535a3781fa4
http://hdl.handle.net/10261/261221
http://hdl.handle.net/10261/261221
Autor:
William J. Schuster, Edmundo Moreno, Angeles Pérez-Villegas, L. Chaves-Velasquez, J. G. Fernandez-Trincado
The effects in the local U-V velocity field due to orbital trapping by bar resonances have been studied computing fifteen resonant families in a non-axisymmetric Galactic potential, considering the bar's angular velocity between 35 and 57.5 ${\rm\,km
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f92098cae8e0ededcbeb5d4ad7caab95
http://arxiv.org/abs/2107.00188
http://arxiv.org/abs/2107.00188
Autor:
J. G. Fernandez-Trincado, María Romero-Colmenares, Stefano O. Souza, E. R. Garro, Angeles Pérez-Villegas, Sandro Villanova, Edmundo Moreno, Javier Alonso-García, Cristian Moni Bidin, Roger E. Cohen, C. Munoz, Beatriz Barbuy, Ian Baeza, Lady Henao, Richard R. Lane, Timothy C. Beers, Penélope Longa-Peña, Dante Minniti, Doug Geisler
We present results from a study of fifteen red giant members of the intermediate-metallicity globular cluster (GC) FSR 1758 using high-resolution near-infrared spectra collected with the Apache Point Observatory Galactic Evolution Experiment II surve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcbbfd7e3ef670fb3421170693a87bc1
http://arxiv.org/abs/2106.00027
http://arxiv.org/abs/2106.00027
Autor:
Tatiana A. Michtchenko, Jacques Raymond Daniel Lépine, Angeles Pérez-Villegas, Douglas A. Barros
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 8 (2021)
This article discusses the effects of the spiral-arm corotation on the stellar dynamics in the Solar Neighborhood (SN). All our results presented here rely on: (1) observational evidence that the Sun lies near the corotation circle, where stars rotat
Autor:
Angeles Pérez-Villegas, Edmundo Moreno, Baitian Tang, Mario Ortigoza-Urdaneta, José G. Fernández-Trincado, Timothy C. Beers
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2019, ⟨10.1093/mnras/stz1848⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2019, ⟨10.1093/mnras/stz1848⟩
The latest edition of the APOGEE-2/DR14 survey catalogue and the first \texttt{Payne} data release of APOGEE abundance determinations by Ting et al. are examined. We identify 31 previously unremarked metal-poor giant stars with anomalously high level
Autor:
Sergio Ortolani, Domenico Nardiello, Mattia Libralato, Eduardo Luiz Damiani Bica, Leandro Kerber, Angeles Pérez-Villegas, Bruno Dias, Stefano O. Souza, Beatriz Barbuy, R. A. P. Oliveira
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
HP$\,$1 is an $\alpha$-enhanced and moderately metal-poor bulge globular cluster with a blue horizontal branch. These combined characteristics make it a probable relic of the early star formation in the innermost Galactic regions. Here we present a d