Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Carlos G. Román-Zúñiga"'
Autor:
Javier Serna, Giovanni Pinzón, Jesús Hernández, Ezequiel Manzo-Martínez, Karina Mauco, Carlos G. Román-Zúñiga, Nuria Calvet, Cesar Briceño, Ricardo López-Valdivia, Marina Kounkel, Guy S. Stringfellow, Keivan G. Stassun, Marc Pinsonneault, Lucia Adame, Lyra Cao, Kevin Covey, Amelia Bayo, Alexandre Roman-Lopes, Christian Nitschelm, Richard R. Lane
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 68 (2024)
We developed a grid of stellar rotation models for low-mass and solar-type classical T Tauri stars (CTTS; 0.3 M _⊙ < M _* < 1.2 M _⊙ ). These models incorporate the star–disk interaction and magnetospheric ejections to investigate the evolution
Externí odkaz:
https://doaj.org/article/3f2ebec67a004852aaa455cd3837a8a2
Autor:
Serat Saad, Kaitlyn Lane, Marina Kounkel, Keivan G. Stassun, Ricardo López-Valdivia, Jinyoung Serena Kim, Karla Peña Ramírez, Guy S. Stringfellow, Carlos G. Román-Zúñiga, Jesús Hernández, Scott J. Wolk, Lynne A. Hillenbrand
Publikováno v:
The Astronomical Journal, Vol 167, Iss 3, p 125 (2024)
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
Externí odkaz:
https://doaj.org/article/348265a21411476ea7aa2c5c88e5181e
Autor:
Carlos G. Román-Zúñiga, Marina Kounkel, Jesús Hernández, Karla Peña Ramírez, Ricardo López-Valdivia, Kevin R. Covey, Amelia M. Stutz, Alexandre Roman-Lopes, Hunter Campbell, Elliott Khilfeh, Mauricio Tapia, Guy S. Stringfellow, Juan José Downes, Keivan G. Stassun, Dante Minniti, Amelia Bayo, Jinyoung Serena Kim, Genaro Suárez, Jason E. Ybarra, José G. Fernández-Trincado, Penélope Longa-Peña, Valeria Ramírez-Preciado, Javier Serna, Richard R. Lane, D. A. García-Hernández, Rachael L. Beaton, Dmitry Bizyaev, Kaike Pan
Publikováno v:
The Astronomical Journal, Vol 165, Iss 2, p 51 (2023)
The Sloan Digital Sky Survey IV APOGEE-2 primary science goal was to observe red giant stars throughout the Galaxy to study its dynamics, morphology, and chemical evolution. The APOGEE instrument, a high-resolution 300-fiber H -band (1.55–1.71 μ m
Externí odkaz:
https://doaj.org/article/8aa936f30c1e4a089541f766e56ade5b
Autor:
Jesús Hernández, Luisa F. Zamudio, César Briceño, Nuria Calvet, Zhaohuan Zhu, Haibo Yuan, Xiaowei Liu, Ezequiel Manzo-Martínez, Carlos G. Román-Zúñiga, Javier Serna, Karina Maucó, Lucía Adame
Publikováno v:
The Astronomical Journal, Vol 165, Iss 5, p 205 (2023)
We present a spectroscopic analysis of T Tauri stars (TTSs) observed with the wide-field multifiber spectrograph LAMOST in the substellar associations Ori OB1a located in the Orion Star-forming Complex. Based on GAIA-DR3 data, we selected stars with
Externí odkaz:
https://doaj.org/article/c3dee1302ed348ac8cbd689d92050d6f
Autor:
Hunter Campbell, Elliott Khilfeh, Kevin R. Covey, Marina Kounkel, Richard Ballantyne, Sabrina Corey, Carlos G. Román-Zúñiga, Jesús Hernández, Ezequiel Manzo Martínez, Karla Peña Ramírez, Alexandre Roman-Lopes, Keivan G. Stassun, Guy S. Stringfellow, Jura Borissova, S. Drew Chojnowski, Valeria Ramírez-Preciado, Jinyoung Serena Kim, Javier Serna, Amelia M. Stutz, Ricardo López-Valdivia, Genaro Suárez, Jason E. Ybarra, Penélope Longa-Peña, José G. Fernández-Trincado
Publikováno v:
The Astrophysical Journal, Vol 942, Iss 1, p 22 (2022)
Very young ( t ≲ 10 Myr) stars possess strong magnetic fields that channel ionized gas from the interiors of their circumstellar disks to the surface of the star. Upon impacting the stellar surface, the shocked gas recombines and emits hydrogen spe
Externí odkaz:
https://doaj.org/article/dcbf61c38f5742cea480a9c04b75da38
Autor:
Javier Serna, Jesus Hernandez, Marina Kounkel, Ezequiel Manzo-Martínez, Alexandre Roman-Lopes, Carlos G. Román-Zúñiga, Maria Gracia Batista, Giovanni Pinzón, Nuria Calvet, Cesar Briceño, Mauricio Tapia, Genaro Suárez, Karla Peña Ramírez, Keivan G. Stassun, Kevin Covey, J. Vargas-González, José G. Fernández-Trincado
We present a large-scale study of stellar rotation for T Tauri stars in the Orion Star-Forming Complex. We use the projected rotational velocity ($v\sin(i)$) estimations reported by the APOGEE-2 collaboration as well as individual masses and ages der
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d64bf3736093021147872fd19e83289d
Autor:
Ilya Straumit, Andrew Tkachenko, Sarah Gebruers, Jeroen Audenaert, Maosheng Xiang, Eleonora Zari, Conny Aerts, Jennifer A. Johnson, Juna A. Kollmeier, Hans-Walter Rix, Rachael L. Beaton, Jennifer L. Van Saders, Johanna Teske, Alexandre Roman-Lopes, Yuan-Sen Ting, Carlos G. Román-Zúñiga
Publikováno v:
Astronomical Journal, 163, 5, pp. 1-20
Astronomical Journal, 163, 1-20
Astronomical Journal, 163, 1-20
The Sloan Digital Sky Survey has recently initiated its 5th survey generation (SDSS-V), with a central focus on stellar spectroscopy. In particular, SDSS-V Milky Way Mapper program will deliver multi-epoch optical and near-infrared spectra for more t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e575deade52c81ab4dacce14ae460787
http://arxiv.org/abs/2203.14538
http://arxiv.org/abs/2203.14538
Autor:
Dani Sprague, Connor Culhane, Marina Kounkel, Richard Olney, K. R. Covey, Brian Hutchinson, Ryan Lingg, Keivan G. Stassun, Carlos G. Román-Zúñiga, Alexandre Roman-Lopes, David Nidever, Rachael L. Beaton, Jura Borissova, Amelia Stutz, Guy S. Stringfellow, Karla Peña Ramírez, Valeria Ramírez-Preciado, Jesús Hernández, Jinyoung Serena Kim, Richard R. Lane
We train a convolutional neural network, APOGEE Net, to predict $T_\mathrm{eff}$, $\log g$, and, for some stars, [Fe/H], based on the APOGEE spectra. This is the first pipeline adapted for these data that is capable of estimating these parameters in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd907a9bc7cf2b611f45ed0145a73fbd
Autor:
Carlos G. Román-Zúñiga, Marina Kounkel, Jesús Hernández, Karla Peña Ramírez, Ricardo López-Valdivia, Kevin R. Covey, Amelia M. Stutz, Alexandre Roman-Lopes, Hunter Campbell, Elliott Khilfeh, Mauricio Tapia, Guy S. Stringfellow, Juan José Downes, Keivan G. Stassun, Dante Minniti, Amelia Bayo, Jinyoung Serena Kim, Genaro Suárez, Jason E. Ybarra, José G. Fernández-Trincado, Penélope Longa-Peña, Valeria Ramírez-Preciado, Javier Serna, Richard R. Lane, D. A. García-Hernández, Rachael L. Beaton, Dmitry Bizyaev, Kaike Pan
The Sloan Digital Sky Survey IV (SDSS-IV) APOGEE-2 primary science goal was to observe red giant stars throughout the Galaxy to study its dynamics, morphology, and chemical evolution. The APOGEE instrument, a high-resolution 300 fiber H-band (1.55-1.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a96d45b83205f836087052280d90921a
Publikováno v:
Universidad Nacional Autónoma de México
UNAM
Redalyc-UNAM
Revista Mexicana de Astronomía y Astrofísica (México) Vol.49
NASA Astrophysics Data System
UNAM
Redalyc-UNAM
Revista Mexicana de Astronomía y Astrofísica (México) Vol.49
NASA Astrophysics Data System
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ad8d9b86d66a44ef68d25f929b7eaec2
https://www.redalyc.org/articulo.oa?id=57153211070
https://www.redalyc.org/articulo.oa?id=57153211070