Search Results - "Roriz, M. P."

High-resolution Spectroscopic Analysis of Four Unevolved Barium Stars by Roriz, M. P., Holanda, N., da Conceição, L. V., Junqueira, S., Drake, N. A., Sonally, A., Pereira, C. B.

“…A classical local thermodynamic equilibrium analysis, based on high-resolution spectroscopic data, is performed for a sample of three potential barium dwarf…”
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Heavy elements in barium stars by Roriz, M P, Lugaro, M, Pereira, C B, Sneden, C, Junqueira, S, Karakas, A I, Drake, N A

“…ABSTRACT New elemental abundances for the neutron-capture elements Sr, Nb, Mo, Ru, La, Sm, and Eu are presented for a large sample of 180 barium (Ba) giant…”
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High-resolution spectroscopic analysis of four new chemically peculiar stars by Roriz, M P, Pereira, C B, Junqueira, S, Lugaro, M, Drake, N A, Sneden, C

“…We present detailed chemical compositions of four stars on the first-ascent red giant branch that are classified as chemically peculiar, but lack comprehensive…”
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Tungsten in barium stars by Roriz, M P, Lugaro, M, Junqueira, S, Sneden, C, Drake, N A, Pereira, C B

“…ABSTRACT Classical barium stars are red giants that receive from their evolved binary companions material exposed to the slow neutron-capture nucleosynthesis,…”
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Rubidium in Barium stars by Roriz, M P, Lugaro, M, Pereira, C B, Drake, N A, Junqueira, S, Sneden, C

“…ABSTRACT Barium (Ba) stars are chemically peculiar stars that display in their atmospheres signatures of the slow neutron-capture (s-process) mechanism that…”
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The open cluster NGC 2345: a study of chemical abundances with near-infrared IGRINS high-resolution spectra by Holanda, N, Roriz, M P, Drake, N A, Junqueira, S, Daflon, S, da Silva, J R P, Pereira, C B

“…ABSTRACT Open clusters are relatively young and numerous. These systems are distributed throughout the Galactic disc and provide insights on the chemistry of…”
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High-resolution spectroscopic analysis of four new chemically peculiar stars by Roriz, M. P, Pereira, C. B, Junqueira, S, Lugaro, M, Drake, N. A, Sneden, C

“…We present detailed chemical compositions of four stars on the first-ascent red giant branch that are classified as chemically peculiar, but lack comprehensive…”
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Barium stars as tracers of s-process nucleosynthesis in AGB stars I. 28 stars with independently derived AGB mass by Cseh, B, Világos, B, Roriz, M. P, Pereira, C. B, D'Orazi, V, Karakas, A. I, Soós, B, Drake, N. A, Junqueira, S, Lugaro, M

“…A&A 660, A128 (2022) Barium (Ba) stars are polluted by material enriched in the slow neutron capture (s-process) elements synthesised in the interior of their…”
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Barium stars as tracers of s-process nucleosynthesis in AGB stars II. Using machine learning techniques on 169 stars by Hartogh, J. W. den, López, A. Yagüe, Cseh, B, Pignatari, M, Világos, B, Roriz, M. P, Pereira, C. B, Drake, N. A, Junqueira, S, Lugaro, M

“…A&A 672, A143 (2023) We aim to analyse the abundance pattern of 169 Barium (Ba) stars, using machine learning techniques and the AGB final surface abundances…”
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High-resolution Spectroscopic Analysis of Four Unevolved Barium Stars HD 15096, HD 37792, and HD 141804 were observed under the program ID 097.A-9024(A). HD 207585 was observed under the agreement between Observatório Nacional (Brazil) and the European Southern Observatory (ESO) by Roriz, M. P., Holanda, N., da Conceição, L. V., Junqueira, S., Drake, N. A., Sonally, A., Pereira, C. B.

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Heavy elements in barium stars by Roriz, M. P, Lugaro, M, Pereira, C. B, Sneden, C, Junqueira, S, Karakas, A. I, Drake, N. A

“…New elemental abundances for the neutron-capture elements Sr, Nb, Mo, Ru, La, Sm, and Eu are presented for a large sample of 180 barium (Ba) giant stars, a…”
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Tungsten in barium stars by Roriz, M. P, Lugaro, M, Junqueira, S, Sneden, C, Drake, N, Pereira, C. B

“…Classical barium stars are red giants that received from their evolved binary companions material exposed to the \textit{slow} neutron-capture nucleosynthesis,…”
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High-resolution spectroscopic analysis of four unevolved barium stars by Roriz, M. P, Holanda, N, da Conceição, L. V, Junqueira, S, Drake, N. A, Sonally, A, Pereira, C. B

“…A classical Local Thermodynamic Equilibrium analysis, based on high-resolution spectroscopic data, is performed for a sample of three potential barium dwarf…”
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