Zobrazeno 71 - 80
of 559
pro vyhledávání: '"Pérez-Villegas, A."'
With the use of a background Milky-Way-like potential model, we performed stellar orbital and magnetohydrodynamic (MHD) simulations. As a first experiment, we studied the gaseous response to a bisymmetric spiral arm potential: the widely employed cos
Externí odkaz:
http://arxiv.org/abs/1505.04327
Publikováno v:
2015 ApJ 802 109
The first mechanism invoked to explain the existence of the thick disk in the Milky Way Galaxy, were the spiral arms. Up-to-date work summon several other possibilities that together seem to better explain this component of our Galaxy. All these proc
Externí odkaz:
http://arxiv.org/abs/1501.07649
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
Autor:
José David Vélez Uribe, Leidy Katherine Gonzalez Madrigal, Duvan Alexis Manquillo Tobón, Mateo Pérez Villegas, Juan Pablo Restrepo Arbeláez, Nicolas Eugenio Gómez Suárez
Publikováno v:
Educación Física y Deporte, Vol 40, Iss 2 (2021)
Objetivo. Describir las características cinemáticas de la patada Kizami Mawashi Geri (KMG) en deportistas élite para establecer parámetros que permitan mejorar el desempeño en su ejecución. Métodos. Se realizó un estudio de enfoque cuantitati
Externí odkaz:
https://doaj.org/article/98135cbf16b44c5f955393f66e8b94ba
Akademický článek
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We built a family of non-axisymmetric potential models for normal non-barred or weakly-barred spiral galaxies as defined in the simplest classification of galaxies: the Hubble sequence. For this purpose a three-dimensional self-gravitating model for
Externí odkaz:
http://arxiv.org/abs/1305.5847
Autor:
Perez-Villegas, Angeles, Pichardo, Barbara, Moreno, Edmundo, Peimbert, Antonio, Velazquez, Hector M.
We built models for low bulge mass spiral galaxies (late type as defined by the Hubble classification) using a 3-D self-gravitating model for spiral arms, and analyzed the orbital dynamics as a function of pitch angle, going from 10$\deg$ to 60$\deg$
Externí odkaz:
http://arxiv.org/abs/1112.3510
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
Externí odkaz:
https://doaj.org/article/f492d398c7124985989751f47555f0b2