Search Results - "Levenhagen, R. S."

Spectroscopic analysis of southern B and Be stars by Levenhagen, R. S., Leister, N. V.

“…Spectroscopic monitoring of 141 southern field B-type stars, 114 of them known to exhibit the Be phenomenon, allowed the estimation of their projected…”
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Achernar: Rapid Polarization Variability as Evidence of Photospheric and Circumstellar Activity by Carciofi, A. C, Magalhães, A. M, Leister, N. V, Bjorkman, J. E, Levenhagen, R. S

“…We present the results of a high-accuracy ( sigma approximately 0.005%) polarization monitoring of the Be star Achernar that was carried out between 2006 July…”
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A FOURIER TRANSFORM METHOD FOR V sin i ESTIMATIONS UNDER NONLINEAR LIMB-DARKENING LAWS by Levenhagen, R S

“…Star rotation offers us a large horizon for the study of many important physical issues pertaining to stellar evolution. Currently, four methods are widely…”
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Deep NIR Surveys in the Galactic Plane: A General Overview and the Study of Scutum’s Spiral Arm by Amôres, E. B., Levenhagen, R. S.

“…Despite the impressive advances in Galactic structure studies, thanks to the large astronomical surveys, there remain several open questions. Although at low…”
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X-ray transmission through nanostructured and microstructured CuO materials by Botelho, M.Z., Künzel, R., Okuno, E., Levenhagen, R.S., Basegio, T., Bergmann, C.P.

“…This study presents a comparison of the X-ray transmission through microsized and nanosized materials. For this purpose CuO nanoparticles, with 13.4nm average…”
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The periodicity of the η Carinae events by Damineli, A., Hillier, D. J., Corcoran, M. F., Stahl, O., Levenhagen, R. S., Leister, N. V., Groh, J. H., Teodoro, M., Colombo, J. F. Albacete, Gonzalez, F., Arias, J., Levato, H., Grosso, M., Morrell, N., Gamen, R., Wallerstein, G., Niemela, V.

“…Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low-excitation event, have been obtained. The variability…”
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A multispectral view of the periodic events in η Carinae by Damineli, A., Hillier, D. J., Corcoran, M. F., Stahl, O., Groh, J. H., Arias, J., Teodoro, M., Morrell, N., Gamen, R., Gonzalez, F., Leister, N. V., Levato, H., Levenhagen, R. S., Grosso, M., Colombo, J. F. Albacete, Wallerstein, G.

“…A full description of the 5.5-yr low excitation events in η Carinae is presented. We show that they are not as simple and brief as previously thought, but a…”
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Ambient dose equivalent and effective dose from scattered x-ray spectra in mammography for Mo/Mo, Mo/Rh and W/Rh anode/filter combinations by Künzel, R, Herdade, S B, Costa, P R, Terini, R A, Levenhagen, R S

“…In this study, scattered x-ray distributions were produced by irradiating a tissue equivalent phantom under clinical mammographic conditions by using Mo/Mo,…”
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Chemical abundance analysis of the Be star HD 171054 by Levenhagen, R.S., Künzel, R.

“…In this work the results of a spectroscopic study of the southern field narrow-line Be star HD 171054 are presented. High dispersion and signal-to-noise ratio…”
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A Fourier transform method for Vsin i estimations under nonlinear Limb-Darkening laws by Levenhagen, R. S.

“…Star rotation offers us a large horizon for the study of many important physical issues pertaining to stellar evolution. Currently, four methods are widely…”
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Kinematics and chemical abundances of the B star HD 28248 by Levenhagen, R.S., Künzel, R., Leister, N.V.

“…► We present medium resolution spectroscopic observations of HD 28248 made at ESO/La Silla. ► Chemical abundances of several elements up to Z=26 and radial…”
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Physical parameters and chemical abundances of δ Ceti by Levenhagen, R.S., Künzel, R., Leister, N.V.

“…► We present medium resolution spectroscopic observations made at ESO/La Silla. ► Physical parameters of the photosphere and chemical abundances were…”
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Spectroscopic analysis of southern B and Be stars: Spectroscopic analysis of B and Be stars by Levenhagen, R. S., Leister, N. V.

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Spectroscopic analysis of southern B and Be stars by Levenhagen, R. S., Leister, N. V.

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Conversion coefficients from air kerma to personal dose equivalent in mammography by Künzel, R., Levenhagen, R.S., Herdade, S.B.

“…In this work, the scattered X-ray beams produced by a mammography unit with a Mo/Mo, Mo/Rh and W/Rh anode/filter combinations were applied in the evaluation of…”
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Achernar: Rapid Polarization Variability as Evidence of Photospheric and Circumstellar Activity by Carciofi, A. C, Magalhães, A. M, Leister, N. V, Bjorkman, J. E, Levenhagen, R. S

“…We present the results of a high accuracy ($\sigma \approx 0.005%$) polarization monitoring of the Be Star Achernar that was carried out between July 7th and…”
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A multispectral view of the periodic events in eta Carinae by Damineli, A, Hillier, D. J, Corcoran, M. F, Stahl, O, Groh, J. H, Arias, J, Teodoro, M, Morrell, N, Gamen, R, Gonzalez, F, Leister, N. V, Levato, H, Levenhagen, R. S, Grosso, M, Colombo, J. F. Albacete, Wallerstein, G

“…A full description of the 5.5-yr low excitation events in Eta Carinae is presented. We show that they are not as simple and brief as previously thought, but a…”
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The periodicity of the eta Carinae events by Damineli, A, Corcoran, M. F, Hillier, D. J, Stahl, O, Levenhagen, R. S, Leister, N. V, Groh, J. H, Teodoro, M, Colombo, J. F. Albacete, Gonzalez, F, Arias, J, Levato, H, Grosso, M, Morrell, N, Gamen, R, Wallerstein, G, Niemela, V

“…Extensive spectral observations of eta Carinae over the last cycle, and particularly around the 2003.5 low excitation event, have been obtained. The…”
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A multispectral view of the periodic events in η Carinae by Damineli, A., Hillier, D. J., Corcoran, M. F., Stahl, O., Groh, J. H., Arias, J., Teodoro, M., Morrell, N., Gamen, R., Gonzalez, F., Leister, N. V., Levato, H., Levenhagen, R. S., Grosso, M., Colombo, J. F. Albacete, Wallerstein, G.

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A multispectral view of the periodic events in [chi] Carinae by Damineli, A, Hillier, D J, Corcoran, M F, Stahl, O, Groh, J H, Arias, J, Teodoro, M, Morrell, N, Gamen, R, Gonzalez, F, Leister, N V, Levato, H, Levenhagen, R S, Grosso, M, Colombo, J F Albacete, Wallerstein, G

“…A full description of the 5.5-yr low excitation events in [eta] Carinae is presented. We show that they are not as simple and brief as previously thought, but…”
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