Zobrazeno 1 - 10
of 1 603
pro vyhledávání: '"Hernandez, Jesus A"'
Autor:
Adame, Lucía, Román-Zúñiga, Carlos, Hernández, Jesús, López-Valdivia, Ricardo, Sánchez, Edilberto
We present tonalli, a spectroscopic analysis python code that efficiently predicts effective temperature, stellar surface gravity, metallicity, $\alpha$-element abundance, and rotational and radial velocities for stars with effective temperatures bet
Externí odkaz:
http://arxiv.org/abs/2411.15342
Autor:
Sánchez-Sanjuán, Sergio, Hernández, Jesús, Pérez-Villegas, Ángeles, Román-Zúñiga, Carlos, Aguilar, Luis, Ballesteros-Paredes, Javier, Bonilla-Barroso, Andrea
In this work, we analysed young stellar clusters with spatial and kinematic coherence in the Orion star-forming complex. For this study, we selected a sample of pre-main sequence candidates using parallaxes, proper motions and positions on the colour
Externí odkaz:
http://arxiv.org/abs/2409.09206
Autor:
López-Valdivia, Ricardo, Adame, Lucía, Lagunas, Eduardo Zagala, Román-Zúñiga, Carlos G., Hernández, Jesús, Sánchez, Edilberto, Fernández-Trincado, José G., Carigi, Leticia, Kounkel, Marina, Lane, Richard R., Stassun, Keivan G., Villanova, Sandro
To date, we have access to enormous inventories of stellar spectra that allow the extraction of atmospheric parameters and chemical abundances essential in stellar studies. However, characterizing such a large amount of data is complex and requires a
Externí odkaz:
http://arxiv.org/abs/2407.17640
Autor:
Serna, Javier, Pinzón, Giovanni, Hernández, Jesús, Manzo-Martínez, Ezequiel, Mauco, Karina, Román-Zúñiga, Carlos G., Calvet, Nuria, Briceño, Cesar, López-Valdivia, Ricardo, Kounkel, Marina, Stringfellow, Guy S., Stassun, Keivan G., Pinsonneault, Marc, Adame, Lucia, Cao, Lyra, Covey, Kevin, Bayo, Amelia, Roman-Lopes, Alexandre, Nitschelm, Christian, Lane, Richard R.
We developed a grid of stellar rotation models for low-mass and solar-type Classical T Tauri stars (CTTS) ($0.3M_{\odot}
Externí odkaz:
http://arxiv.org/abs/2403.07505
Autor:
Saad, Serat, Lane, Kaitlyn, Kounkel, Marina, Stassun, Keivan G., López-Valdivia, Ricardo, Kim, Jinyoung Serena, Ramírez, Karla Peña, Stringfellow, Guy S., Román-Zúñiga, Carlos G., Hernández, Jesús, Wolk, Scott J., Hillenbrand, Lynne A.
We developed a tool that measures equivalent widths of various lines in low resolution optical spectra, and it was applied to stellar spectra obtained as part of SDSS-V and LAMOST programs. These lines, such as Li I which directly indicates stellar y
Externí odkaz:
http://arxiv.org/abs/2401.01932
Autor:
Cuevas-Otahola, Bolivia, Mayya, Divakara, Arriaga-Hernandez, Jesus, Puerari, Ivanio, Bruzual, Gustavo
The presence of a population of a large number ($\sim$400) of almost coeval (100--300 Myr) super star clusters (SSCs) in the disk of M82 offers an opportunity to construct the Cluster Initial Mass Function (CIMF) from the observed present-day Cluster
Externí odkaz:
http://arxiv.org/abs/2309.00719
We show that the classical strong maximum principle, concerning positive supersolutions of linear elliptic equations vanishing on the boundary of the domain $\Omega $ can be extended, under suitable conditions, to the case in which the forcing term $
Externí odkaz:
http://arxiv.org/abs/2308.02626
Autor:
Hernández, Jesús Hernández
This work is the extension of the results by the author in [7] and [6] for low-genus surfaces. Let $S$ be an orientable, connected surface of finite topological type, with genus $g \leq 2$, empty boundary, and complexity at least $2$; as a complement
Externí odkaz:
http://arxiv.org/abs/2307.15161
Autor:
Kounkel, Marina, Stassun, Keivan G., Hillenbrand, Lynne A., Hernández, Jesús, Serna, Javier, Curtis, Jason Lee
We use TESS full-frame imaging data to investigate the angular momentum evolution of young stars in Orion Complex. We confirm recent findings that stars with rotation periods faster than 2 d are overwhelmingly binaries, with typical separations of te
Externí odkaz:
http://arxiv.org/abs/2303.04834
Autor:
Kounkel, Marina, Zari, Eleonora, Covey, Kevin, Tkachenko, Andrew, Zúñiga, Carlos Román, Stassun, Keivan, Stutz, Amelia M., Stringfellow, Guy, Roman-Lopes, Alexandre, Hernández, Jesús, Ramírez, Karla Peña, Bayo, Amelia, Kim, Jinyoung Serena, Cao, Lyra, Wolk, Scott J., Kollmeier, Juna, López-Valdivia, Ricardo, Rojas-Ayala, Bárbara
The fifth iteration of the Sloan Digital Sky Survey (SDSS-V) is set to obtain optical and near-infrared spectra of $\sim$5 million stars of all ages and masses throughout the Milky Way. As a part of these efforts, APOGEE & BOSS Young Star Survey (ABY
Externí odkaz:
http://arxiv.org/abs/2301.07186