Zobrazeno 1 - 10
of 1 250
pro vyhledávání: '"Vìlchez, J."'
We present a search for galaxies in the local Universe with extremely low oxygen abundance, that is, more than 25 times lower than solar, which corresponds to 12 + log(O/H) < 7.3. To determine the oxygen abundance, we apply the direct Te method for o
Externí odkaz:
http://arxiv.org/abs/2408.04019
Autor:
Zinchenko, I. A., Vilchez, J. M.
We quantified the disparity between gas-phase and stellar metallicity in a large galaxy sample obtained from the MaNGA DR17 survey. We found that the gas metallicity is on average closely aligned with the stellar metallicity in the centers of interme
Externí odkaz:
http://arxiv.org/abs/2407.21160
Publikováno v:
A&A 688, A28 (2024)
We apply a methodology to build a sample of extreme emission line galaxies (EELGs) using integral field spectroscopy data. In this work we follow the spectroscopic criteria corresponding for EELG selection and use the MUSE Hubble Ultra-Deep field sur
Externí odkaz:
http://arxiv.org/abs/2404.17415
Autor:
Coulter, D. A., Kilpatrick, C. D., Jones, D. O., Foley, R. J., Filippenko, A. V., Zheng, W., Swift, J. J., Rahman, G. S., Stacey, H. E., Piro, A. L., Rojas-Bravo, C., Vilchez, J. Anais, Muñoz-Elgueta, N., Arcavi, I., Dimitriadis, G., Siebert, M. R., Bloom, J. S., Bustamante-Rosell, M. J., Clever, K. E., Davis, K. W., Kutcka, J., Macias, P., McGill, P., Quiñonez, P. J., Ramirez-Ruiz, E., Siellez, K., Tinyanont, S., Cenko, S. B., Drout, M. R., Hausen, R., Jacobson-Galán, W. V., Howell, D. Andrew, Kasen, D., McCully, C., Rest, A., Taggart, K., Valenti, S.
We present an ultraviolet-to-infrared search for the electromagnetic (EM) counterpart to GW190425, the second-ever binary neutron star (BNS) merger discovered by the LIGO-Virgo-KAGRA Collaboration (LVK). GW190425 was more distant and had a larger loc
Externí odkaz:
http://arxiv.org/abs/2404.15441
Publikováno v:
A&A 685, A81 (2024)
Recent work presented increasing evidence of high, non-constant S/O abundance ratios observed in star-forming metal-poor galaxies, showing deviations from the constant canonical S/O across a large range of O/H abundance. Similar peculiar high Fe/O ra
Externí odkaz:
http://arxiv.org/abs/2402.13240
Autor:
Amorín, R. O., Rodríguez-Henríquez, M., Fernández, V., Vílchez, J. M., Marques-Chaves, R., Schaerer, D., Izotov, Y. I., Firpo, V., Guseva, N., Jaskot, A. E., Komarova, L., Muñoz-Vergara, D., Oey, M. S., Bait, O., Carr, C., Chisholm, J., Ferguson, H., Flury, S. R., Giavalisco, M., Hayes, M. J., Henry, A., Ji, Z., King, W., Leclercq, F., Östlin, G., Pentericci, L., Saldana-Lopez, A., Thuan, T. X., Trebitsch, M., Wang, B., Worseck, G., Xu, X.
We report observational evidence of highly turbulent ionized gas kinematics in a sample of 20 Lyman continuum (LyC) emitters (LCEs) at low redshift ($z\sim 0.3$). Detailed Gaussian modeling of optical emission line profiles in high-dispersion spectra
Externí odkaz:
http://arxiv.org/abs/2401.04278
Autor:
Díaz-García, L. A., Delgado, R. M. González, García-Benito, R., Martínez-Solaeche, G., Rodríguez-Martín, J. E., López-Sanjuan, C., Hernán-Caballero, A., Márquez, I., Vílchez, J. M., Abramo, R., Alcaniz, J., Benítez, N., Bonoli, S., Carneiro, S., Cenarro, A. J., Cristóbal-Hornillos, D., Dupke, R. A., Ederoclite, A., Marín-Franch, A., de Oliveira, C. Mendes, Moles, M., Sodré, L., Taylor, K., Varela, J., Ramió, H. Vázquez
Publikováno v:
A&A 688, A113 (2024)
We aim at developing a robust methodology for constraining the luminosity and stellar mass functions (LMFs) of galaxies by solely using data from multi-filter surveys and testing the potential of these techniques for determining the evolution of the
Externí odkaz:
http://arxiv.org/abs/2311.18051
Autor:
Hernán-Caballero, A., Akhlaghi, M., López-Sanjuan, C., Vázquez-Ramió, H., Laur, J., Varela, J., Civera, T., Muniesa, D., Finoguenov, A., Fernández-Ontiveros, J. A., Domínguez-Sánchez, H., Chaves-Montero, J., Fernández-Soto, A., Lumbreras-Calle, A., Díaz-García, L. A., del Pino, A., Delgado, R. M. González, Hernández-Monteagudo, C., Coelho, P., Jiménez-Teja, Y., Lopes, P. A. A., Marra, V., Tempel, E., Vílchez, J. M., Abramo, R., Alcaniz, J., Benítez, N., Bonoli, S., Carneiro, S., Cenarro, J., Cristóbal-Hornillos, D., Dupke, R., Ederoclite, A., Marín-Franch, A., de Oliveira, C. Mendes, Moles, M., Sodré Jr., L., Taylor, K.
Publikováno v:
A&A 684, A61 (2024)
We present a new method for obtaining photometric redshifts (photo-z) for sources observed by multiple photometric surveys using a combination (conflation) of the redshift probability distributions (PDZs) obtained independently from each survey. The
Externí odkaz:
http://arxiv.org/abs/2311.04220
Autor:
Arroyo-Polonio, A., Iglesias-Páramo, J., Kehrig, C., Vílchez, J. M., Amorín, R., Breda, I., Pérez-Montero, E., Pérez-Díaz, B., Hayes, M.
Publikováno v:
aa46192-23 2023
Green Pea galaxies are remarkable for their intense star formation and serve as a window into the early universe. In our study, we used integral field spectroscopy to examine 24 of these galaxies in the optical spectrum. We focused on the interaction
Externí odkaz:
http://arxiv.org/abs/2309.09585
Autor:
Maturi, M., Finoguenov, A., Lopes, P. A. A., Delgado, R. M. González, Dupke, R. A., Cypriano, E. S., Carrasco, E. R., Diego, J. M., Penna-Lima, M., Vílchez, J. M., Moscardini, L., Marra, V., Bonoli, S., Rodríguez-Martín, J. E., Zitrin, A., Márquez, I., Hernán-Caballero, A., Jiménez-Teja, Y., Abramo, R., Alcaniz, J., Benitez, N., Carneiro, S., Cenarro, J., Cristóbal-Hornillos, D., Ederoclite, A., López-Sanjuan, C., Marín-Franch, A., de Oliveira, C. Mendes, Moles, M., Sodré Jr., L., Taylor, K., Varela, J., Ramió, H. Vázquez, Fernández-Ontiveros, J. A.
Publikováno v:
A&A 678, A145 (2023)
Samples of galaxy clusters allow us to better understand the physics at play in galaxy formation and to constrain cosmological models once their mass, position (for clustering studies) and redshift are known. In this context, large optical data sets
Externí odkaz:
http://arxiv.org/abs/2307.06412