Search Results - "Coelho, R.T."

A new library of theoretical stellar spectra with scaled-solar and α-enhanced mixtures by Coelho, P. R. T.

“…Theoretical stellar libraries have been increasingly used to overcome limitations of empirical libraries, e.g. by exploring atmospheric parameter spaces not…”
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Some effects of cutting edge preparation and geometric modifications when turning INCONEL 718™ at high cutting speeds by Coelho, R.T., Silva, L.R., Braghini, A., Bezerra, A.A.

“…The geometry of the cutting edge and its preparation can play a significant role on the insert performance, directly affecting tool life, surface finish and…”
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To use or not to use synthetic stellar spectra in population synthesis models? by Coelho, Paula R T, Bruzual, Gustavo, Charlot, Stéphane

“…Stellar population synthesis (SPS) models are invaluable to study star clusters and galaxies. They provide means to extract stellar masses, stellar ages, star…”
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HR-pypopstar: high-wavelength-resolution stellar populations evolutionary synthesis model by Millán-Irigoyen, I, Mollá, M, Cerviño, M, Ascasibar, Y, García-Vargas, M L, Coelho, P R T

“…ABSTRACT We present the HR-pyPopStar model, which provides a complete set (in ages) of high-resolution (HR) spectral energy distributions of Single Stellar…”
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UV upturn versus UV weak galaxies: differences and similarities of their stellar populations unveiled by a de-biased sample by Dantas, M L L, Coelho, P R T, Sánchez-Blázquez, P

“…ABSTRACT The ultraviolet (UV) upturn is characterized by an unexpected up-rise of the UV flux in quiescent galaxies between the Lyman limit and 2500 Å. By…”
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S-PLUS: exploring wide field properties of multiple populations in galactic globular clusters at different metallicities by Hartmann, Eduardo A, Bonatto, Charles J, Chies-Santos, Ana L, Alonso-García, Javier, Bastian, Nate, Overzier, Roderik, Schoenell, William, Coelho, Paula R T, Branco, Vinicius, Kanaan, Antonio, Mendes de Oliveira, Claudia, Ribeiro, Tiago

“…ABSTRACT Multiple stellar populations (MSPs) are a ubiquitous phenomenon in Galactic globular clusters (GCs). By probing different spectral ranges affected by…”
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Testing stellar population fitting ingredients with Globular Clusters I: Stellar libraries by Martins, Lucimara P, Lima-Dias, Círia, Coelho, Paula R T, Laganá, Tatiana F

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UV bright red-sequence galaxies: how do UV upturn systems evolve in redshift and stellar mass? by Dantas, M L L, Coelho, P R T, de Souza, R S, Gonçalves, T S

“…ABSTRACT The so-called ultraviolet (UV) upturn of elliptical galaxies is a phenomenon characterized by the up-rise of their fluxes in bluer wavelengths,…”
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Stellar spectral models compared with empirical data by Knowles, Adam T, Sansom, A E, Coelho, P R T, Allende Prieto, C, Conroy, C, Vazdekis, A

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Data acquisition and monitoring in machine tools with CNC of open architecture using internet by Ferraz Jr, F., Coelho, R.T.

“…This paper presents a proposed system for data acquisition and monitoring of manufacturing process in machine tools with CNC of open architecture, using the…”
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Surface brightness fluctuation spectrum: a new probe of evolved stars in unresolved stellar populations by Mitzkus, Martin, Walcher, C Jakob, Roth, Martin M, Coelho, Paula R T, Cioni, Maria-Rosa L, Raimondo, Gabriella, Rejkuba, Marina

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The GALANTE photometric survey of the northern Galactic plane: project description and pipeline by Maíz Apellániz, J, Alfaro, E J, Barbá, R H, Holgado, G, Vázquez-Ramió, H, Varela, J, Ederoclite, A, Lorenzo-Gutiérrez, A, García-Lario, P, García Escudero, H, García, M, Coelho, P R T

“…ABSTRACT The GALANTE optical photometric survey is observing the northern Galactic plane and some adjacent regions using seven narrow- and…”
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Clues on the history of early-type galaxies from SDSS spectra and GALEX photometry by Werle, A, Cid Fernandes, R, Vale Asari, N, Coelho, P R T, Bruzual, G, Charlot, S, de Carvalho, R R, Herpich, F R, Mendes de Oliveira, C, Sodré, L, Ruschel-Dutra, D, de Amorim, A, Sampaio, V M

“…ABSTRACT Stellar population studies of early-type galaxies (ETGs) based on their optical stellar continuum suggest that these are quiescent systems. However,…”
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An Investigation of the Wear Mechanisms of Polycrystalline Cubic Boron Nitride (PCBN) Tools when End Milling Hardened Steels at Low/Medium Cutting Speeds by Braghini Jr, A., Coelho, R.T.

“…The commercial availability of PCBN tools has created the possibility for great improvements in the area of machining hardened steels. Roughing and finishing…”
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The application of polycrystalline diamond (PCD) tool materials when drilling and reaming aluminium based alloys including MMC by Coelho, R.T., Yamada, S., Aspinwall, D.K., Wise, M.L.H.

“…Following a review of metal matrix composite (MMC) materials and production methods, the paper outlines the development and application of PCD cutting tools…”
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The machinability of aluminium-based SiC reinforced metal matrix composite (MMC) alloy with emphasis on hole production by Coelho, R.T

“…When drilling MMC and the conventional A1-Si alloys a higher tool wear rate was observed as the silicon content increased. The wear when drilling MMC however,…”
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