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Constraining the nature of the possible extrasolar PDS110b ring system [article]

Tiago F. L. L. Pinheiro, Rafael Sfair
2021 arXiv   pre-print
Pinheiro and Rafael Sfair: Constraining the nature of the possible extrasolar PDS110b ring system  ... 
arXiv:2107.05179v1 fatcat:yd25xgoj25b6plgrktpysjg2jy

The brightening of Saturn's F ring

Robert S. French, Mark R. Showalter, Rafael Sfair, Carlos A. Argüelles, Myriam Pajuelo, Patricio Becerra, Matthew M. Hedman, Philip D. Nicholson
2012 Icarus (New York, N.Y. 1962)  
Image photometry reveals that the F ring is approximately twice as bright during the Cassini tour as it was during the Voyager flybys of 1980 and 1981. It is also three times as wide and has a higher integrated optical depth. We have performed photometric measurements of more than 4,800 images of Saturn's F ring taken over a five-year period with Cassini's Narrow Angle Camera. We show that the ring is not optically thin in many observing geometries and apply a photometric model based on
more » ... cattering in the presence of shadowing and obscuration, deriving a mean effective optical depth tau = 0.033. Stellar occultation data from Voyager PPS and Cassini VIMS validate both the optical depth and the width measurements. In contrast to this decades-scale change, the baseline properties of the F ring have not changed significantly from 2004 to 2009. However, we have investigated one major, bright feature that appeared in the ring in late 2006. This transient feature increased the ring's overall mean brightness by 84% and decayed with a half-life of 91 days.
doi:10.1016/j.icarus.2012.02.020 fatcat:vbciu73dfjgindp3t6n5zee73e

Particles Co-orbital to Janus and to Epimetheus: A Firefly Planetary Ring

Othon C. Winter, Alexandre P. S. Souza, Rafael Sfair, Silvia M. Giuliatti Winter, Daniela C. Mourão, Dietmar W. Foryta
2017 Astrophysical Journal  
The combination of these two parameters leads to the ring's steadystate mass (Dikarev et al. 2006; Sfair & Giuliatti Winter 2012) .  ...  As we are dealing with μm-sized particles, the force due to the solar radiation pressure was also included in the numerical simulations (Sfair et al. 2009 ).  ... 
doi:10.3847/1538-4357/aa9c7f fatcat:pm6aqjfiorhmxlzba7umppo7ja

Agradecimientos : diciembre de 1967

Boletin Cultural y Bibliográfico Banco de la República
1967 Boletín Cultural y Bibliográfico  
Varios: Rafael Bernal Jimén ez ...... . ... . Eduardo Camacho Guizado ...... . Augusto E spinosa Valderrama ... . Rafael Ortiz González .. .. ...... .  ...  Rafael Colmenares del Castillo . . . Guía policiva -2 Ejemps . -2~ E d. - Antonio Bastidas Villota ....... . Rafael Colmenares del Castillo . ..  ... 
doaj:bbcb099c77724880b56a647cbecb6a2a fatcat:6hoiaa3op5cqjeb5rkqnbnolby

Comparação de softwares de análise de imagem para a determinação da área foliar / Comparison of image analysis softwares for the determination of leaf area

Jhonatan Rafael ZÁRATE-SALAZAR, Mirela Natália SANTOS, José Nailson Barros SANTOS, ISLA Flavio Lozano
2018 Zenodo  
., 2015; MUSCARELLA; URIARTE, 2016; SFAIR; ROSADO; TABARELLI, 2016) , bem como para a reconstrução de paisagens paleobotânicas (ROYER et al., 2005) .  ... 
doi:10.5281/zenodo.2542855 fatcat:2ibxuhhnpbc43gys66v7v3b2pe

Últimas adquisiciones : agosto de 1966

Boletín Cultural y Bibliográfico Banco de la República
1966 Boletín Cultural y Bibliográfico  
Gonzalo Jirnénez, Rafael. R34ol .. . Naderías metahistóricas; pr ecedidas de una efímera selección de poesías patrióticas. Bogotá, 1965.  ...  Calila y Dimna; traducción diTecta del árabe del texto de Abda- llah Ibn Almokaffa por Antonio Chalita Sfair. Ibagué, Ed. Tolima, [1965]. 230 p., 1 h. l. 16 cm. l.  ... 
doaj:32bc960c701e4eaa979eeb26f060673c fatcat:l4of4b6jajejvgzmocbkspj54y

Principales causas de la morosidad en la jurisdicción laboral

Rafael Ospina Morales
2006 Prolegómenos  
PARDO RUEDA Rafael. La historia de las guerras, Editorial Vergara, primera edición, 2004.  ...  Versión Calita Sfair. Editorial Panmamericana. 14ª. edición, Bogotá, Colombia, p. 179. Bogotá D. C. Colombia -Volumen IX. -No. 18. -Julio -Diciembre 2006. -ISSN 0121-182X.  ... 
doi:10.18359/prole.2577 fatcat:5w2igg7bkjcijnxrifwp45d7pa

OUP accepted manuscript

2019 Monthly notices of the Royal Astronomical Society  
The authors would like to thank Ernesto Vieira Neto for some criticism that improved the work, and Silvia Giuliatti Winter and Rafael Sfair for fruitful discussions.  ... 
doi:10.1093/mnras/stz246 fatcat:6w5kexnv5fg37c6o3ooyxxisyi

Formation of the Janus-Epimetheus system through collisions

L. L. Treffenstädt, Décio C. Mourão, Othon C. Winter
2015 Astronomy and Astrophysics  
We thank Rafael Sfair for providing file storage for our results on short notice. Othon C. Winter thanks FABESP (proc. 2011/08171-3) and CNPq.  ... 
doi:10.1051/0004-6361/201425543 fatcat:4rui4oqof5efxmnoq6e6av33mq

Ultimas adquisiciones: Obras colombianas y extranjeras enero de 1967

Boletín Cultural y Bibliográfico Banco de la República
1967 Boletín Cultural y Bibliográfico  
Botánica; Rafael Salord Galiano . . . 580 1 . Zoologia. 214 - 24 cm. 690 V4 5~t References : p . 741-788 . l. Fisiología comparada.  ...  Calila y Dimma; traducción dir ecta del árabe del texto de Abdallah Ibn Almokaffa por Antio Chalita Sfair. !bagué, Ed. Tolima, [1965 ?] 2 v . íront. ( ret.). ls . 16 cm. x v, 155 p.  ... 
doaj:3c6859c3f42b4e8681e2aa6a022eb7bd fatcat:xtkuv5kyeranlg2z3bg6ucfjz4

Altímetro Laser para a Missão Espacial Brasileira ASTER – ALR: modelagens e Simulações para Criação do Software a Embarcar na Unidade de Controle e Processamento de Sinais do Instrumento

A. G. V. de Brum, F. C. da Cruz, A. Hetem Jr
2013 unpublished
Sandonato ; Rafael Sfair THE ASTER MISSION: EXPLORING FOR THE FIRST TIME A TRIPLE SYSTEM ASTEROID.  ... 
doi:10.5540/03.2013.001.01.0173 fatcat:cagbybwwcvdsfkfjmr5fgagzha

Dynamical effects on the classical Kuiper Belt during the excited-Neptune model [article]

Rafael Ribeiro de Sousa, Rodney Gomes, Alessandro Morbidelli and Ernesto Vieira Neto
2018 arXiv   pre-print
R.R.S also thanks Rafael Sfair for turning possible our simulations on the cluster of computers that belongs to São Paulo State University.  ... 
arXiv:1808.02146v1 fatcat:i24das4smrcbbdlcslqinnz3mu

O leitor da crítica de cinema: observações sobre um agente receptivo-ativo

Rafael Oliveira Carvalho
2016 Verso e Reverso  
Outra leitora, Julia Caram Sfair, tenta sustentar, por sua vez, a tese de que Tarantino seria "um diretor extremamente feminista" (Villaça, 2015, s.p.) , destacando as posições e atitudes da per-O leitor  ... 
doi:10.4013/ver.2016.31.76.07 fatcat:6nstowigubf6jc7qq76rdwgd6m

Dynamics of the dust rings and satellites of Uranus and of the Saturn's F-ring [article]

R. Sfair
2013 arXiv   pre-print
Rafael Sfair NASCIMENTO 30.10.1984 -CURITIBA / PR FILIAÇÃO Osni Bento de Oliveira Ana Rita de Oliveira FORMAÇÃO 2001 -2004 Bacharelado e Licenciatura em Física Departamento de Física UFPR  ...  Sfair, C. Aguelles, M. Pajuelo, P. Becerra, M. M. Hedman & P. D.  ... 
arXiv:1307.3230v1 fatcat:6qbi7f3x7vhbtmjczo7qbtqfni

Earth-size planet formation in the habitable zone of circumbinary stars [article]

G. O. Barbosa, O. C. Winter, A. Amarante, A. Izidoro, R. C. Domingos, E. E. N. Macau
2020 pre-print
We also thank Paul Mason who helped us with his code for calculating habitable zones and Rafael Sfair with all computational support.  ...  Using an adaptation made by us [called MINOR-MERCURY package (Amarante, Winter & Sfair 2019)] of the numerical integrator of n-body MERCURY (Chambers 1999 ) based on Chambers et al. (2002) , with the  ... 
doi:10.1093/mnras/staa757 arXiv:2003.11682v1 fatcat:agrcdvw7mvagbnnx2et4ngmvam
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