Redshift-Distance Survey of Early-Type Galaxies. I. Sample Selection, Properties, and Completeness

This is the first in a series of papers describing the recently completed all-sky redshift-distance survey of Early-type NEARby galaxies (ENEAR) carried out for peculiar velocity analysis. The sample is divided into two parts and consists of 1607 elliptical and lenticular galaxies with cz ≤ 7000 km s-1 and with blue magnitudes brighter than mB = 14.5 (ENEARm) and of galaxies in clusters (ENEARc). Galaxy distances based on the Dn-σ and fundamental plane (FP) relations are now available for 1359 and 1107 ENEARm galaxies, respectively, with roughly 80% based on new data gathered by our group. The Dn-σ and FP template distance relations are derived by combining 569 and 431 galaxies in 28 clusters, respectively, of which about 60% are based on our new measurements. To date the ENEAR survey has accumulated 2200 R-band images yielding photometric parameters for 1398 galaxies and 2300 spectra yielding 1745 measurements of central velocity dispersions and spectral line indices for 1210 galaxies. In addition, there are some 1834 spectra of early-type galaxies available in the Southern Sky Redshift Survey (SSRS+SSRS2) database, out of which roughly 800 galaxies yield high-quality measurements of velocity dispersions and spectral line indices, bringing the total number of galaxies with available spectral information to about 2000. Combined with measurements publicly available, a catalog has been assembled comprising ~4500 measurements of central velocity dispersions for about 2800 galaxies, ~3700 measurements of photometric parameters for about 2000 galaxies, and distances for about 1900 galaxies. This extensive database provides information on galaxies with multiple observations from different telescope/instrument configurations and from different authors. These overlapping data are used to derive relations to transform all available measurements into a common system, thereby ensuring the homogeneity of the database. The ENEARm redshift-distance survey extends the earlier work of the 7S and the recent Tully-Fisher surveys sampling a comparable volume. In subsequent papers of this series we intend to use the ENEAR sample by itself or in combination with the I-band field spiral (SFI) Tully-Fisher survey to analyze the properties of the local peculiar velocity field and to test how sensitive the results are to the different sampling of the galaxy distribution and to the distance relation used. We also anticipate that the homogeneous database assembled will be used for a variety of other applications and serve as a benchmark for similar studies at high redshift

Redshift-Distance Survey of Early-Type Galaxies: Dipole of the Velocity Field

We use the recently completed redshift-distance survey of nearby early-type galaxies (ENEAR) to measure the dipole component of the peculiar velocity field to a depth of cz ~ 6000 km s-1. The sample consists of 1145 galaxies brighter than mB = 14.5 and with cz ≤ 7000 km s-1, uniformly distributed over the whole sky, and 129 fainter cluster galaxies within the same volume. Most of the Dn-σ distances were obtained from new spectroscopic and photometric observations conducted by this project, ensuring the homogeneity of the data over the whole sky. These 1274 galaxies are objectively assigned to 696 objects—282 groups/clusters and 414 isolated galaxies. We find that within a volume of radius ~6000 km s-1, the best-fitting bulk flow has an amplitude of = 220 ± 60 ± 50 km s-1 in the cosmic microwave background rest frame pointing toward l = 304° ± 16°, b = 25° ± 11°. The error in the amplitude includes statistical, sampling, and possible systematic errors. This solution is in excellent agreement with that obtained by the SFI (I-band field spiral) Tully-Fisher survey. Our results suggest that most of the motion of the Local Group is due to fluctuations within 6000 km s-1, in contrast to recent claims of large-amplitude bulk motions on larger scales

Eficiência da utilização de fungicida na incidência de fumonisinas totais na cultura do milho.

Edição dos Anais do XVII Congresso Brasileiro de Sementes, Natal, 2011

Alternativas de controle para redução de grãos ardidos na cultura do milho.

As podridões de espiga e grãos ardidos estão entre as principais doenças da cultura do milho. O presente trabalho teve como objetivo avaliar o efeito da resistência genética e densidade de plantio na incidência de grãos ardidos na cultura do milho. O experimento de resistência genética foi conduzido nas cidades de Indianópolis -MG e Guarda-Mor –MG. O experimento de densidade de plantio foi conduzido na cidade de Sete Lagoas –MG. Realizaram-se identificação e quantificação dos grãos ardidos das amostras de grãos colhidos nos experimentos. Foi realizado o Teste de Patologia de Sementes, através do método do papel de filtro umedecido, para identificação dos fungos associados à ocorrência de grãos ardidos. Foram identificadas cultivares com alto nível de resistência a grãos ardidos. O aumento da densidade de plantio resultou em aumento na incidência de grãos ardidos. De acordo com os resultados obtidos, conclui-se que a resistência genética é uma alternativa viável de controle de fungos que atacam as espigas, e o aumento na densidade de plantio influencia a incidência de grãos ardidos na cultura do milho

Redshift-Distance Survey of Early-Type Galaxies. IV. Dipoles of the Velocity Field

We use the recently completed redshift-distance survey of nearby early-type galaxies (ENEAR) to measure the dipole component of the peculiar velocity field to a depth of cz ~ 6000 km/s. The sample consists of 1145 galaxies brighter than m_B=14.5 and cz < 7000 km/s, uniformly distributed over the whole sky, and 129 fainter cluster galaxies within the same volume. Most of the Dn-sigma distances were obtained from new spectroscopic and photometric observations conducted by this project, ensuring the homogeneity of the data over the whole sky. These 1274 galaxies are objectively assigned to 696 objects -- 282 groups/clusters and 414 isolated galaxies. We find that within a volume of radius ~ 6000 km/s, the best-fitting bulk flow has an amplitude of |vbulk| =220 +/- 42 km/s in the CMB restframe, pointing towards l=304 +/- 16 degrees, b=25 +/- 11 degrees. The error in the amplitude includes statistical, sampling and possible systematic errors. This solution is in excellent agreement with that obtained by the SFI Tully-Fisher survey. Our results suggest that most of the motion of the Local Group is due to fluctuations within 6000 km/s, in contrast to recent claims of large amplitude bulk motions on larger scales.Comment: 11 pages, 2 figures, ApJL, accepted (updated results; matches accepted version

Quantificação de perdas na produção de grãos causadas pela antracnose foliar em diferentes genótipos de sorgo.

Trabalho publicado também no 7º Seminário de Iniciação Científica PIBIC/BIC Júnior, 2014, Sete Lagoas

Ocorrência de fumonisinas totais em milho Bt e com aplicação de inseticidas.

Edição dos Anais do XVII Congresso Brasileiro de Sementes, Natal, 2011