Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Evolucao galatica"'
Autor:
Dors Júnior, Oli Luiz, Valerdi, Mabel, Freitas-Lemes, Priscila, Krabbe, Angela Cristina, Riffel, Rogemar André, Amôres, Eduardo Brescansin de, Riffel, Rogério, Armah, Mark, Santos, Adriano Francisco Monteiro dos, Oliveira Junior, Celso Benedito de
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
For the first time, the helium abundance relative to hydrogen (He/H), which relied on direct measurements of the electron temperature, has been derived in the narrow line regions (NLRs) from a local sample of Seyfert 2 nuclei. In view of this, optica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::b721b23c8d8eecf82ddc0fa7525f17a7
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
The structure of the Small Magellanic Cloud (SMC) is very complex, in particular in the periphery that suffers more from the interactions with the Large Magellanic Cloud (LMC). A wealth of observational evidence has been accumulated revealing tidal t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::5f2f30f740b6e37e23e4521f9bfa642e
Autor:
Nascimento, Janaina Correa do, Dors Júnior, Oli Luiz, Storchi-Bergmann, Thaisa, Mallmann, Nícolas Dullius, Riffel, Rogério, Ilha, Gabriele da Silva, Riffel, Rogemar André, Rembold, Sandro Barboza, Machado, Alice Deconto, Costa, Luiz N. da, Armah, Mark
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We derive the metallicity (traced by the O/H abundance) of the narrow-line region (NLR) of 108 Seyfert galaxies as well as radial metallicity gradients along their galaxy discs and of these of a matched control sample of no active galaxies. In view o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::2c9ec8fd515410124708dc2e210d5c38
Autor:
Riffel, Rogério, Hahn, Luis Gabriel Dahmer, Riffel, Rogemar André, Storchi-Bergmann, Thaisa, Dametto, Natacha Zanon, Davies, Richard I., Burtscher, Leonard, Bianchin, Marina, Dutra, Daniel Ruschel, Ricci, Claudio, Rosario, David
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We use Gemini Near-Infrared Integral Field Spectrograph (NIFS) adaptive optics assisted data cubes to map the stellar population of the inner few hundred parsec of a sample of 18 nearby Seyfert galaxies. The near-infrared light is dominated by the co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::020096c4774ac1bf12157872227d4ce5
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Ionized gas kinematics provide crucial evidence of the impact that active galactic nuclei (AGNs) have in regulating star formation in their host galaxies. Although the presence of outflows in AGN host galaxies has been firmly established, the calcula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::a10d18d75896fc32fe8925c0476b560e
Autor:
Adam L. Schaefer, Christy Tremonti, Guinevere Kauffmann, Brett H. Andrews, Matthew A. Bershady, Nicholas F. Boardman, Kevin Bundy, Niv Drory, José G. Fernández-Trincado, Holly P. Preece, Rogério Riffel, Rogemar A. Riffel, Sebastián F. Sánchez
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We present, for the first time, the relationship between local stellar mass surface density, $\mathrm{\Sigma_{*}}$, and N/O derived from SDSS-IV MaNGA data, using a sample of $792765$ high signal-to-noise ratio star-forming spaxels. Using a combinati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::608ce46fc5c3be709c453f98e3e29b08
Autor:
Freitas, Rodrigo Flores de, Chies-Santos, Ana Leonor, Furlanetto, Cristina, de Rossi, María Emilia, Ferreira, Leonardo de Albernaz, Zenocratti, Lucas, Alamo-Martínez, Karla A.
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Relic galaxies are massive compact quiescent galaxies that formed at high-redshift and remained almost unchanged since then. In this work, we search for analogues to relic galaxies in the TNG50 cosmological simulations to understand relic formation a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::4bbf0c3f37d33635246754f1781d95e2
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We quantify evolution in the cluster-scale stellar mass–halo mass (SMHM) relation’s parameters using 2323 clusters and brightest central galaxies (BCGs) over the redshift range 0.03 z 0.60. The precision on the inferred SMHM parameters is i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::1cc267ffc013fa5d7e9503645bfbad41
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Abundances of light elements in dwarf stars of different ages are important constraints for stellar yields, Galactic chemical evolution and exoplanet chemical composition studies. We have measured C and N abundances and $^{12}$C/$^{13}$C ratios for a
Autor:
Alfonso Aragón-Salamanca, Michael R. Merrifield, Vladimir Avila-Reese, Niv Drory, Amelia Fraser-McKelvie, Rogério Riffel, Thomas Peterken, Johan H. Knapen
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We perform a "fossil record" analysis for ~800 low-redshift spiral galaxies, using STARLIGHT applied to integral field spectroscopic observations from the SDSS-IV MaNGA survey to obtain fully spatially-resolved high-resolution star formation historie