Navegação por Assunto "Astrometria"

Resultados 1-9 de 9

    • Anchoring the distence scale via x-ray/infrared data for Cepheid clusters : SU Cas 

      Majaess, Daniel J.; Turner, D. G.; Gallo, Luigi; Gieren, Wolfgang P.; Bonatto, Charles Jose; Lane, Dave; Balam, D.; Berdnikov, L. (2012) [Artigo de periódico]
      New X-ray (XMM-Newton) and JHKs (Observatoire du Mont-Mégantic) observations for members of the star cluster Alessi 95, which Turner et al. discovered hosts the classical Cepheid SU Cas, were used in tandem with UCAC3 ...

    • Calibração espectroscópica de [α/FE] VS LOGG & [FE/H] utilizando análise química de 50 estrelas FGK 

      Ico, João Weckerle Santos (2022) [Trabalho de conclusão de graduação]
      Todos os anos novos surveys astronômicos são anunciados prometendo mais qualidade e quantidade de dados. Além dos atuais telescópios que já nos fornecem informações extremamente precisas, para a próxima década são esperados ...

    • Detailed analysis of open clusters : a mass function break and evidence of a fundamental plane 

      Bonatto, Charles Jose; Bica, Eduardo Luiz Damiani (2005) [Artigo de periódico]
      We derive photometric, structural and dynamical evolution-related parameters of 11 nearby open clusters with ages in the range 70 Myr to 7 Gyr and masses in the range ≈400 Mʘ to ≈5300 Mʘ. The clusters are homogeneously ...

    • Estágios finais da evolução de aglomerados abertos 

      Pavani, Daniela Borges (2001) [Dissertação]
      No presente trabalho estudamos aglomerados abertos e/ou grupos estelares não tão densos com o objetivo de identificar prováveis estágios dinâmicos evoluídos de aglomerados abertos. A seleção dos grupos estelares partiu de ...

    • Is J 133658.3-295105 a radio source at z ≥= 1.0 or at the distance of M 83? 

      Dottori, Horacio Alberto; Díaz, Rubén Joaquín; Mast, Damián (2008) [Artigo de periódico]
      We present Gemini optical imaging and spectroscopy of the radio source J 133658.3–295105. This source has been suggested to be the core of an FR II radio source with two detected lobes. J 133658.3–295105 and its lobes are ...

    • New SX Phe variables in the globular cluster NGC 288 

      Martinazzi, Elizandra; Kepler, Souza Oliveira; Costa, Jose Eduardo da Silveira; Pieres, Adriano; Bonatto, Charles Jose; Bica, Eduardo Luiz Damiani; Fraga, Luciano (2015) [Artigo de periódico]
      We report the discovery of two new variable stars in the metal-poor globular cluster NGC 288, found by means of time series CCD photometry. We classified the new variables as SX Phoenicis (SX Phe) due to their characteristic ...

    • Reducing ground-based astrometric errors with Gaia and Gaussian processes 

      Fortino, Willow Fox; Santiago, Basilio Xavier; DES Collaboration (2021) [Artigo de periódico]
      Stochastic field distortions caused by atmospheric turbulence are a fundamental limitation to the astrometric accuracy of ground-based imaging. This distortion field is measurable at the locations of stars with accurate ...

    • Very low mass stellar and substellar companions to solar-like stars from MARVELS. II. A short-period companios orbiting an F star with evidence of a stellar tertiary and significant mutual inclination 

      Fleming, S.W.; Jian Ge; Barnes, Rory; Beatty, Thomas G.; Crepp, Justin R.; De Lee, Nathan M.; Esposito, Massimiliano; Femenía Castellá, B.; Ferreira, Letícia D.; Gary, Bruce L.; Gaudi, B. S.; Ghezzi, Luan; González Hernández, Jonay I.; Hebb, Leslie; Jiang, Peng; Lee, Brian L.; Nelson, Ben; Mello, Gustavo Frederico Porto de; Shappee, Benjamin J.; Stassun, Keivan G.; Thompson, Todd; Tofflemire, Benjamin M.; Wisniewski, J.P.; Wood-Vasey, W.M.; Agol, Eric; Allende Prieto, Carlos; Bizyaev, D.; Brewington, Howard J.; Cargile, Phillip A.; Coban, Louis; Costello, Korena S.; Costa, Luiz N. da; Good, Melanie L.; Hua, Nelson; Kane, Stephen R.; Lander, Gary R.; Liu, Jian; Ma, Bo; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Malanushenko, E.; Malanushenko, V.; Muna, Demitri; Nguyen, D.C.; Oravetz, Daniel J.; Paegert, Martin; Pan, K.; Pepper, J.; Rebolo, Rafael; Roebuck, Eric J.; Santiago, Basilio Xavier; Schneider, D.P.; Bradley, Alaina C. Shelden; Simmons, Audrey E.; Sivarani, Thirupathi; Snedden, S.A.; Vincent, Chelsea L. M.; Wan, Xiaoke; Wang, Ji; Weaver, Benjamin A.; Weaver, Gwendolyn M.; Zhao, Bo (2012) [Artigo de periódico]
      We report the discovery via radial velocity (RV) measurements of a short-period (P = 2.430420±0.000006 days) companion to the F-type main-sequence star TYC 2930-00872-1. A long-term trend in the RV data also suggests the ...

    • VVV DR1 : the first data release of the Milky Way bulge and southern plane from the near-infrared ESO public survey VISTA variables in the Vía Láctea 

      Saito, Roberto K.; Hempel, Maren; Minniti, Dante; Lucas, Philip W.; Rejkuba, Marina; Toledo, Ignacio; Gonzalez, O. A.; Alonso Garcia, Javier; Irwin, Michael John; Gonzalez-Solares, Eduardo; Hodgkin, Simon; Lewis, James R.; Cross, Nick; Ivanov, Valentin D.; Kerins, Eamonn; Emerson, Jim P.; Soto, M.; Amôres, Eduardo Brescansin de; Gurovich, Sebástian; Dékány, István; Angeloni, Rodolfo; Beamin, Juan Carlos; Catelan, Márcio; Padilla, Nelson; Zoccali, Manuela; Pietrukowicz, Pawel; Moni Bidin, Christian; Mauro, Francesco; Geisler, Doug; Folkes, S. L.; Sale, Stuart E.; Borissova, Jura; Kurtev, Radostin Georgiev; Ahumada, Andrea Veronica; Alonso, Maria Victoria; Adamson, Andy; Arias, Julia Inés; Bandyopadhyay, Reba M.; Barbá, Rodolfo H.; Barbuy, Beatriz; Baume, Gustavo Luis; Bedin, Luigi R.; Bellini, Andrea; Bica, Eduardo Luiz Damiani; Bonatto, Charles Jose; Bronfman, Leonardo; Carraro, Giovanni; Chené, André-Nicolas; Claria Olmedo, Juan Jose; Clarke, J. R. A.; Contreras, C.; Corvillon, Andrea; Grijs, Richard de; Dias, Bruno Moreira de Souza; Drew, Janet E.; Fariña, Cecilia; Feinstein Baigorri, Carlos; Fernández Lajús, Eduardo Eusebio; Gamen, Roberto C.; Gieren, Wolfgang P.; Goldman, Bertrand; González-Fernández, Carlos; Grand, R. J. J.; Gunthardt, Guillermo; Hambly, Nigel C.; Hanson, M. M.; Helminiak, Krzysztof Grzegorz; Hoare, Melvin G.; Huckvale, L.; Jordán, Andrés; Kinemuchi, Karen; Longmore, Andy; López Corredoira, Martín; Maccarone, Thomas J.; Majaess, Daniel J.; Martín Guerrero de Escalante, Eduardo L.; Masetti, Nicola; Mennickent, Ronnald Enrique; Mirabel, I. Felix; Monaco, Lorenzo; Morelli, Lorenzo; Motta, Verónica; Palma, Tali; Parisi, M. C.; Parker, Quentin; Peñaloza, Francisco; Pietrzynski, Grzegorz; Pignata, Giuliano; Popescu, Bogdan; Read, Michael A.; Rojas, Alejandra; Roman-Lopes, Alexandre; Ruiz, Maria Teresa; Saviane, Ivo; Schreiber, Matthias R.; Schröder, A. C.; Sharma, S.; Smith, Michael D.; Sodre Junior, Laerte; Stead, Joe; Stephens, Andrew; Tamura, Motohide; Tappert, Claus; Thompson, Mark A.; Valenti, Elena; Vanzi, Leonardo; Walton, Nicholas A.; Weidmann, Walter; Zijlstra, Albert (2012) [Artigo de periódico]
      Context. The ESO public survey VISTA variables in the Vía Láctea (VVV) started in 2010. VVV targets 562 sq. deg in the Galactic bulge and an adjacent plane region and is expected to run for about five years. Aims. We ...