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Now showing items 23324-23343 of 24122

    • The VMC survey - IX : Pilot study of the proper motion of stellar populations in the LMC from 2MASS and VISTA data 

      Cioni, M-R.L.; Giradi, L.; Moretti, M.I.; Piffl, T.; Ripepi, V.; Rubele, S.; Scholz, R.D.; Bekki, K.; Clementini, G.; Ivanov, V.D.; Oliveira, J.M.; van Loon, J. Th (2014-02)
      Proper motion (PM) studies are fundamental ingredients in the understanding of the orbital history of galaxies. Current measurements do not yet provide a satisfactory answer to the possible scenarios for the formation and ...

    • The VMC survey - V : First results for classical Cepheids 

      Ripepi, V.; Moretti, M.I.; Marconi, M.; Clementini, G.; Cioni, M-R.L.; Marquette, J-B.; Girardi, L.; Rubele, S.; Groenewegen, M.A.T.; de Grijs, R.; Gibson, B. K.; Oliveira, J.M.; van Loon, J. Th; Emerson, J.P. (2012-08)
      The VISTA Magellanic Cloud (VMC; PI: M.-R. L. Cioni) survey is collecting deep Ks-band time series photometry of the pulsating variable stars hosted by the system formed by the two Magellanic Clouds (MCs) and the bridge ...

    • The VMC survey - VII : Reddening map of the 30 Doradus field and the structure of the cold interstellar medium 

      Tatton, B.; van Loon, J. Th; Cioni, M-R.L.; Clementini, G.; Emerson, J.P.; Girardi, L.; de Grijs, R.; Groenewegen, M.A.T.; Gullieuszik, M.; Ivanov, V.D.; Moretti, M.I.; Ripepi, V.; Rubele, S. (2013-06)
      The details of how galaxies have evolved over cosmological times are imprinted in their star formation history, chemical enrichment and morpho-kinematic structure. Parameters behind these, such as effective temperature and ...

    • The VMC survey - VIII : First results for anomalous Cepheids 

      Ripepi, V.; Marconi, M.; Moretti, M.I.; Clementini, G.; Cioni, M-R.L.; de Grijs, R.; Emerson, J.P.; Groenewegen, M.A.T.; Ivanov, V.D.; Oliveira, J.M. (2014-01-21)
      The VISTA near-infrared YJKs survey of the Magellanic Clouds System (VMC, PI M.-R. L. Cioni) is collecting deep Ks-band time-series photometry of the pulsating variable stars hosted in the system formed by the two Magellanic ...

    • The VMC survey - X : The technique of using Cepheids, RR Lyrae stars and binaries to probe the Magellanic system structure 

      Moretti, M.I.; Clementini, G.; Tatiana, Muraveva; Ripepi, V.; Marquette, J-B.; Cioni, M-R.L.; Marconi, M.; Girardi, L.; Rubele, S.; Tisserand, P.; de Grijs, R.; Groenewegen, M.A.T.; Guandalini, Roald; Ivanov, V.D.; van Loon, J. Th (2014-01)
      The VISTA near-infrared Y, J, Ks survey of the Magellanic System (VMC) survey is obtaining multi-epoch photometry in the Ks band of the Magellanic System down to a limiting magnitude of Ks~19.3 for individual epoch data. ...

    • The VMC survey - XI : Radial Stellar Population Gradients in the Galactic Globular Cluster 47 Tucanae 

      Chengyan, Li; de Grijs, R.; Deng, Licai; Rubele, S.; Wang, Chuchu; Bekki, K.; Cioni, M-R.L.; Clementini, G.; Emerson, J.P.; For, Bi-Qing; Girardi, L.; Groenewegen, M.A.T.; Guandalini, Roald; Gullieuszik, M.; Marconi, M.; Piatti, Andres; Ripepi, V.; van Loon, J. Th. (2014-07)
      We present a deep near-infrared color-magnitude diagram of the Galactic globular cluster 47 Tucanae, obtained with the Visible and Infrared Survey Telescope for Astronomy (VISTA) as part of the VISTA near-infrared Y, J, ...

    • The VMC survey - XII : Star cluster candidates in the large magellanic cloud 

      Piatti, Andrés E.; Guandalini, Roald; Ivanov, Valentin D.; Rubele, Stefano; Cioni, M-R.L.; De Grijs, Richard; For, Bi Qing; Clementini, Gisella; Ripepi, Vincenzo; Anders, Peter; Oliveira, Joana M. (2014-10)
      In this work we analyse colour-magnitude diagrams (CMDs) of catalogued star clusters located in the Large Magellanic Cloud (LMC), from a YJKs photometric data set obtained by the Visible and Infrared Survey Telescope for ...

    • The VMC Survey - XIII : Type II Cepheids in the Large Magellanic Cloud 

      Ripepi, V.; Moretti, M.I.; Marconi, M.; Clementini, G.; Cioni, M-R.L.; de Grijs, R.; Emerson, J.P.; Groenewegen, M.A.T.; Ivanov, Valentin D.; Muraveva, T.; Piatti, A.E.; Subramanian, S. (2015-01-21)
      The VISTA (Visible and Infrared Survey Telescope for Astronomy) survey of the Magellanic Clouds System (VMC) is collecting deep Ks-band time-series photometry of the pulsating variable stars hosted in the system formed by ...

    • The VMC survey - XIV : First results on the look-back time star formation rate tomography of the Small Magellanic Cloud 

      Rubele, S.; Girardi, L.; Kerber, L.; Cioni, M-R.L.; Piatti, A.E.; Zaggia, S.; Bekki, K.; Bressan, A.; Clementini, G.; de Grijs, R.; Emerson, J.P.; Groenewegen, M.A.T.; Ivanov, Valentin D.; Marconi, M.; Marigo, P.; Moretti, M.I.; Ripepi, V.; Subramanian, S.; Tatton, B.L.; van Loon, J. Th (2015-05-01)
      We analyse deep images from the VISTA survey of the Magellanic Clouds in the YJKs filters, covering 14 deg2 (10 tiles), split into 120 subregions, and comprising the main body and Wing of the Small Magellanic Cloud (SMC). ...

    • The VMC survey - XV : The Small Magellanic Cloud-Bridge connection history as traced by their star cluster populations 

      Piatti, A.E.; de Grijs, R.; Rubele, S.; Cioni, M-R.L.; Ripepi, V.; Kerber, L. (2015-06-11)
      We present results based on YJKs photometry of star clusters located in the outermost, eastern region of the Small Magellanic Cloud (SMC). We analysed a total of 51 catalogued clusters whose colour-magnitude diagrams (CMDs), ...

    • The VMC survey - XVI : Spatial variation of the cluster-formation activity in the innermost regions of the Large Magellanic Cloud 

      Piatti, Andrés E.; De Grijs, Richard; Ripepi, V.; Ivanov, Valentin D.; Cioni, M-R.L.; Marconi, M.; Rubele, S.; Bekki, K.; For, Bi-Qing (2015-11-21)
      We present results based on YJKs photometry of star clusters in the Large Magellanic Cloud (LMC), distributed throughout the central part of the galaxy's bar and the 30 Doradus region. We analysed the field-star-decontaminated ...

    • The VMC survey - XVII : The proper motions of the Small Magellanic Cloud and the Milky Way globular cluster 47 Tucanae 

      Cioni, M-R.L.; Bekki, K.; Girardi, L.; De Grijs, Richard; Irwin, M.; Ivanov, Valentin D.; Marconi, M.; Oliveira, Joana M.; Piatti, Andrés E.; Ripepi, V.; van Loon, J. Th (2016-01-28)
      In this study we use multi-epoch near-infrared observations from the VISTA survey of the Magellanic Cloud system (VMC) to measure the proper motion of different stellar populations in a tile of 1.5 deg sq. in size in the ...

    • The VMC survey - XVIII : Radial dependence of the low-mass, 0.57-0.82 Msun stellar mass function in the galactic globular cluster 47 Tucanae 

      Chaoli, Zhang; Li, Chengyuan; De Grijs, Richard; Bekki, K.; Deng, Licai; Zaggia, S.; Rubele, S.; Piatti, Andrés E.; Cioni, M-R.L.; Emerson, J.P.; For, Bi-Qing; Ripepi, V.; Marconi, Marcella; Ivanov, Valentin D.; Chen, Li (2015-12-14)
      We use near-infrared observations obtained as part of the Visible and Infrared Survey Telescope for Astronomy (VISTA) Survey of the Magellanic Clouds (VMC), as well as two complementary Hubble Space Telescope (HST) data ...

    • The VMC survey - XX. Identification of new Cepheids in the Small Magellanic Cloud 

      Moretti, M. I.; Clementini, G.; Ripepi, V.; Marconi, M.; Rubele, S.; Cioni, M. R L; Muraveva, T.; Groenewegen, M. A T; Cross, N. J G; Ivanov, V. D.; Piatti, A. E.; de Grijs, R. (2016-06-21)
      We present Ks-band light curves for 299 Cepheids in the Small Magellanic Cloud (SMC) of which 288 are new discoveries that we have identified using multi-epoch near-infrared photometry obtained by the VISTA survey of the ...

    • The VMC Survey - XXI. New star cluster candidates discovered from infrared photometry in the Small Magellanic Cloud 

      Piatti, Andrés E.; Ivanov, Valentin D.; Rubele, Stefano; Marconi, Marcella; Ripepi, Vincenzo; Cioni, Maria Rosa L; Oliveira, Joana M.; Bekki, Kenji (2016-07-21)
      We report the first search for new star clusters performed using the VISTA near-infrared YJKs Magellanic Clouds survey (VMC) data sets. We chose a pilot field of ~0.4 deg2 located in the South-west of the Small Magelllanic ...

    • The VMC survey I. Strategy and first data 

      Cioni, M-R.L.; Clementini, G.; Girardi, L.; Guandalini, R.; Gullieuszik, M.; Miszalski, B.; Moretti, M.I.; Ripepi, V.; Rubele, S.; Bagheri, G.; Bekki, K.; Cross, N.J.G.; de Blok, W.J.G.; de Grijs, R.; Emerson, J.P.; Evans, C.J.; Gibson, B.; Gonzales-Solares, E.; Groenewegen, M.A.T.; Irwin, M.J.; Ivanov, V.D.; Lewis, J.; Marconi, M.; Marquette, J-B.; Mastropietro, C.; Moore, B.; Napiwotzki, R.; Naylor, T.; Oliveira, J.M.; Read, M.; Sutorius, E.; van Loon, J.T.; Wilkinson, M.I.; Wood, P.R. (2011-03)
      Context: The new VISual and Infrared Telescope for Astronomy (VISTA) has started operations. Over its first five years it will be collecting data for six public surveys, one of which is the near-infrared YJK(s) VISTA survey ...

    • The VMC survey II : A multi-wavelength study of LMC planetary nebulae and their mimics 

      Miszalski, Brent; Napiwotzki, Ralf; Cioni, M-R.L.; Groenewegen, M.A.T.; Oliveira, J.M.; Udalski, A. (2011)
      The VISTA Magellanic Cloud (VMC) survey is assembling a deep, multi-epoch atlas of Y JKs photometry across the Magellanic Clouds. Prior to the VMC survey only the brightest Magellanic Cloud PNe (MCPNe) were accessible at ...

    • The VMC survey III : Mass-loss rates and luminosities of LMC AGB stars 

      Gullieuszik, M.; Groenewegen, M.A.T.; Cioni, M-R.L.; de Grijs, R.; van Loon, J. Th; Girardi, L.; Ivanov, V.D.; Oliveira, J.M.; Emerson, J.P.; Guandalini, R. (2012-01)
      Context. Asymptotic giant branch (AGB) stars are major contributors to both the chemical enrichment of the interstellar medium and the integrated light of galaxies. Despite its importance, the AGB is one of the least ...

    • The VMC survey VI : Quasars behind the Magellanic system 

      Cioni, M-R.L.; Kamath, D.; Wood, P.R.; Rubele, S.; Van Loon, J.T.; Emerson, J.P.; Gibson, B. K.; Groenewegen, M.A.T.; Ivanov, V.D.; Miszalski, B.; Ripepi, V. (2013-01)
      Context. The number and spatial distribution of confirmed quasi-stellar objects (QSOs) behind the Magellanic system is limited. This undermines their use as astrometric reference objects for different types of studies. ...

    • THE VMC SURVEY. XIX. CLASSICAL CEPHEIDS in the SMALL MAGELLANIC CLOUD 

      Ripepi, V.; Marconi, M.; Moretti, M. I.; Clementini, G.; Cioni, M. R L; De Grijs, R.; Emerson, J. P.; Groenewegen, M. A T; Ivanov, V. D.; Piatti, A. E. (2016-06-01)
      The VISTA near-infrared YJK s survey of the Magellanic Clouds System (VMC) is collecting deep K s-band time-series photometry of pulsating variable stars hosted by the two Magellanic Clouds and their connecting Bridge. In ...