Navegação Ciências Exatas e da Terra por Autor "Irwin, Michael John"

Resultados 1-5 de 5

    • FSR 1716 : a new Milky Way globular cluster confirmed using VVV RR Lyrae stars 

      Minniti, Dante; Palma, Tali; Dékány, István; Hempel, Maren; Rejkuba, Marina; Pullen, Joyce; Alonso Garcia, Javier; Barbá, Rodolfo H.; Barbuy, Beatriz; Bica, Eduardo Luiz Damiani; Bonatto, Charles Jose; Borissova, Jura; Catelan, Márcio; Carballo-Bello, Julio A.; Chené, André-Nicolas; Claria Olmedo, Juan Jose; Cohen, Roger; Contreras Ramos, Rodrigo; Dias, Bruno Moreira de Souza; Emerson, Jim P.; Froebrich, Dirk; Buckner, Anne S. M.; Geisler, Doug; Gonzalez, Oscar A.; Gran, Felipe; Hajdu, Gergely; Irwin, Michael John; Ivanov, Valentin D.; Kurtev, Radostin Georgiev; Lucas, Philip W.; Majaess, Daniel J.; Mauro, Francesco; Moni Bidin, Christian; Navarrete, Camila; Ramírez Alegría, Sebastián; Saito, Roberto K.; Valenti, Elena; Zoccali, Manuela (2017) [Artigo de periódico]
      We use deep multi-epoch near-IR images of the VISTA Variables in the Vía Láctea (VVV) Survey to search for RR Lyrae stars toward the Southern Galactic plane. Here, we report the discovery of a group of RR Lyrae stars close ...

    • Hot degenerates in the MCT survey. I. MCT 130-1937, a new, color-selected PG 1159 object 

      Demers, Serge; Wesemael, F.; Irwin, Michael John; Fontaine, Gilles; Kepler, Souza Oliveira; Lamontagne, R.; Holberg, J.B. (1990) [Artigo de periódico]
      We report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of a new white dwarf star belonging to the PG 1159 spectroscopic class. A variety of spectroscopic ...

    • Hot degenerates in the montreal-cambridge-tololo survey. II. Two new hybrid white dwarfs, MCT 0128-3846 and MCT 0453-2933 and the nature of the dab stars 

      Bergeron, Pierre; Lamontagne, R.; Fontaine, Gilles; Beauchamp, A.; Demers, Serge; Irwin, Michael John; Holberg, J.B.; Vennes, S.; Kepler, Souza Oliveira; Wesemael, F. (1994) [Artigo de periódico]
      We report the discovery, in the course of a survey for high-latitude, ultraviolet-excess objects in the southern hemisphere, of two new hybrid DAB stars. Both objects exhibit a weak He I λ4471 line superposed onto the usual ...

    • A new hot DA white dwarf in a region of exceptionally low HI density 

      Barstow, Martin A.; Wesemael, F.; Holberg, J.B.; Buckley, David A.H.; Stobie, Robert S.; Mittaz, J.P.D.; Fontaine, Gilles; Rosen, Simon R.; Demers, Serge; Lamontagne, R.; Irwin, Michael John; Bergeron, Pierre; Kepler, Souza Oliveira; Vennes, S. (1994) [Artigo de periódico]
      We report the discovery of the hot DA white dwarf RE 0457- 281 which has the lowest line-of-sight neutral hydrogen column density yet measured. The star was found independently by the ROSAT EUV, Montreal-Cambridge-Tololo ...

    • 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 ...