Zobrazeno 1 - 10
of 140
pro vyhledávání: '"ESTEBAN, CÉSAR"'
Chlorine (Cl) is a chemical element of the group of the halogens and is between the 17th and the 20th most abundant elements in the Solar System. It is thought to be produced from the capture of a proton or neutron by specific alpha-element isotopes
Externí odkaz:
http://arxiv.org/abs/2410.18673
Autor:
Méndez-Delgado, J. Eduardo, Esteban, César, García-Rojas, Jorge, Kreckel, Kathryn, Peimbert, Manuel
In a very recent work, [1] claim that the scenario of temperature inhomogeneities proposed by [2] ($t2$ > 0) is not able to explain the O$^{2+}$/H$^{+}$ abundance discrepancy observed between the calculations based on the optical [OIII] collisional e
Externí odkaz:
http://arxiv.org/abs/2310.01197
Autor:
Méndez-Delgado, J. Eduardo, Esteban, César, García-Rojas, Jorge, Kreckel, Kathryn, Peimbert, Manuel
HII regions, ionized nebulae where massive star formation has taken place, exhibit a wealth of emission lines that are the fundamental basis for estimating the chemical composition of the Universe. For more than 80 years, a discrepancy of at least a
Externí odkaz:
http://arxiv.org/abs/2305.11578
We use Gemini GMOS-IFU observations of three luminous nearby Seyfert galaxies (Mrk79, Mrk348 and Mrk607) to estimate the electron temperature ($T_{\rm e}$) fluctuations in the inner 0.4-1.1 kpc region of these galaxies. Based on $T_{\rm e}$ determina
Externí odkaz:
http://arxiv.org/abs/2106.03623
We present optical spectra of nine Galactic H II regions observed with the 10.4 m Gran Telescopio Canarias telescope and located at Galactocentric distances (RG) from 4 to 8 kpc. The distances of the objects have been revised using Gaia DR2 parallaxe
Externí odkaz:
http://arxiv.org/abs/2012.06643
Autor:
Prada, Francisco, Content, Robert, Goobar, Ariel, Izzo, Luca, Pérez, Enrique, Agnello, Adriano, del Burgo, Carlos, Dhillon, Vik, Diego, José M., Galbany, Lluis, García-Rojas, Jorge, Jones, David, Lawrence, Jon, Martín, Eduardo, Mediavilla, Evencio, García, M. Ángeles Pérez, Almeida, Jorge Sánchez, Pulido, José A. Acosta, López-Sánchez, Angel R., Arribas, Santiago, Carrera, Francisco J., Corral, Amalia, Domínguez, Inmaculada, Mateos, Silvia, Nuñez, Silvia Martínez, Villaver, Eva, Osorio, María Rosa Zapatero, Albertus, Conrado, Battaia, Fabrizio Arrigoni, Barrado, David, Bejar, Víctor J. S., Boffin, Henri M. J., Bouy, Herve, Burgasser, Adam, Esteban, Cesar, Lodieu, Nicolas, Calderón, María Morales, Garrido, Antonio Pérez, Gil, Pablo Rodríguez, Carracedo, Ana Sagués, García, Miguel Santander, Solano, Enrique, Torres, Manuel A. P., Wesson, Roger
MAAT is proposed as a visitor mirror-slicer optical system that will allow the OSIRIS spectrograph on the 10.4-m Gran telescopio CANARIAS (GTC) the capability to perform Integral Field Spectroscopy (IFS) over a seeing-limited FoV 14.20''x10'' with a
Externí odkaz:
http://arxiv.org/abs/2007.01603
We present a reassessment of the radial abundance gradients of C, N, O, Ne, S, Cl and Ar in the Milky Way using deep spectra of 33 H II regions gathered from the literature, covering Galactocentric distances from 6 to 17 kpc. The distances of the obj
Externí odkaz:
http://arxiv.org/abs/2005.11372
Autor:
Delgado-Inglada, Gloria, Mesa-Delgado, Adal, García-Rojas, Jorge, Rodríguez, Mónica, Esteban, César
We perform a homogeneous analysis of the Fe/Ni abundance ratio in eight Galactic planetary nebulae (PNe) and three Galactic H II regions that include the Orion nebula, where we study four nebular zones and one shocked region. We use [Fe ii], [Fe iii]
Externí odkaz:
http://arxiv.org/abs/1512.05664
Publikováno v:
In Reports of Practical Oncology & Radiotherapy July-August 2019 24(4):347-354
Autor:
Lopez-Sanchez, Angel R., Koribalski, Baerbel, van Eymeren, Janine, Esteban, Cesar, Kirby, Emma, Jerjen, Helmut, Lonsdale, Nyssa
(Abridged) We present new, deep HI line and 20-cm radio continuum data of the very puzzling blue compact dwarf galaxy NGC 5253, obtained with the ATCA as part of the `Local Volume HI Survey' (LVHIS). Our low-resolution HI maps show the disturbed HI m
Externí odkaz:
http://arxiv.org/abs/1109.0806