4 results on '"Lopez-Santiago, J."'
Search Results
2. TheGaia-ESO Survey: Structural and dynamical properties of the young cluster Chamaeleon I
- Author
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Sacco, G. G., primary, Spina, L., additional, Randich, S., additional, Palla, F., additional, Parker, R. J., additional, Jeffries, R. D., additional, Jackson, R., additional, Meyer, M. R., additional, Mapelli, M., additional, Lanzafame, A. C., additional, Bonito, R., additional, Damiani, F., additional, Franciosini, E., additional, Frasca, A., additional, Klutsch, A., additional, Prisinzano, L., additional, Tognelli, E., additional, Degl’Innocenti, S., additional, Prada Moroni, P. G., additional, Alfaro, E. J., additional, Micela, G., additional, Prusti, T., additional, Barrado, D., additional, Biazzo, K., additional, Bouy, H., additional, Bravi, L., additional, Lopez-Santiago, J., additional, Wright, N. J., additional, Bayo, A., additional, Gilmore, G., additional, Bragaglia, A., additional, Flaccomio, E., additional, Koposov, S. E., additional, Pancino, E., additional, Casey, A. R., additional, Costado, M. T., additional, Donati, P., additional, Hourihane, A., additional, Jofré, P., additional, Lardo, C., additional, Lewis, J., additional, Magrini, L., additional, Monaco, L., additional, Morbidelli, L., additional, Sousa, S. G., additional, Worley, C. C., additional, and Zaggia, S., additional
- Published
- 2017
- Full Text
- View/download PDF
3. TheGaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra
- Author
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Puspitarini, L., primary, Lallement, R., additional, Babusiaux, C., additional, Chen, H.-C., additional, Bonifacio, P., additional, Sbordone, L., additional, Caffau, E., additional, Duffau, S., additional, Hill, V., additional, Monreal-Ibero, A., additional, Royer, F., additional, Arenou, F., additional, Peralta, R., additional, Drew, J. E., additional, Bonito, R., additional, Lopez-Santiago, J., additional, Alfaro, E. J., additional, Bensby, T., additional, Bragaglia, A., additional, Flaccomio, E., additional, Lanzafame, A. C., additional, Pancino, E., additional, Recio-Blanco, A., additional, Smiljanic, R., additional, Costado, M. T., additional, Lardo, C., additional, de Laverny, P., additional, and Zwitter, T., additional
- Published
- 2014
- Full Text
- View/download PDF
4. The Gaia-ESO Survey: a kinematical and dynamical study of four young open clusters
- Author
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A. Klutsch, Jack Lewis, Lorenzo Spina, Loredana Prisinzano, V. Roccatagliata, Ettore Flaccomio, Angela Bragaglia, Francesco Damiani, Amelia Bayo, E. Zari, Carmela Lardo, Nicholas J. Wright, Giovanni Carraro, Elena Pancino, Sofia Randich, Antonio Frasca, Estelle Moraux, Simone Zaggia, Sergey E. Koposov, P. Francois, R. J. Jackson, Javier López-Santiago, A. Hourihane, R. D. Jeffries, L. Morbidelli, F. M. Jiménez-Esteban, Paula Jofre, Gerry Gilmore, E. Franciosini, G. G. Sacco, L. Bravi, S. G. Sousa, M. T. Costado, Laura Magrini, C. C. Worley, Gilmore, Gerard [0000-0003-4632-0213], Worley, Clare [0000-0001-9310-2898], Apollo - University of Cambridge Repository, Pôle Gérontologie, Centre Hospitalier Universitaire de Nice (CHU Nice), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Osservatorio Astronomico di Bologna (OABO), Istituto Nazionale di Astrofisica (INAF), Laboratoire des Agrégats Moléculaires et Matériaux Inorganiques (LAMMI), Centre National de la Recherche Scientifique (CNRS)-Université Montpellier 2 - Sciences et Techniques (UM2), Newcastle University [Newcastle], INAF - Osservatorio Astronomico di Bologna (OABO), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), Institute of Astronomy [Cambridge], University of Cambridge [UK] (CAM), University of Turin, INAF - Osservatorio Astrofisico di Catania (OACT), M2A 2013, Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB), Ecole Polytechnique Fédérale de Lausanne (EPFL), Universidade de Sao Paulo, Instituto Ocenografico, Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Universidade de São Paulo (USP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Bravi L., Zari E., Sacco G.G., Randich S., Jeffries R.D., Jackson R.J., Franciosini E., Moraux E., Lopez-Santiago J., Pancino E., Spina L., Wright N.J., Jimenez-Esteban F.M., Klutsch A., Roccatagliata V., Gilmore G., Bragaglia A., Flaccomio E., Francois P., Koposov S.E., Bayo A., Carraro G., Costado M.T., Damiani F., Frasca A., Hourihane A., Jofre P., Lardo C., Lewis J., Magrini L., Morbidelli L., Prisinzano L., Sousa S.G., Worley C.C., and Zaggia S.
- Subjects
astro-ph.SR ,astro-ph.GA ,Metallicity ,stars: kinematics and dynamics ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,stars: pre-main sequence ,01 natural sciences ,Virial theorem ,QB460 ,0103 physical sciences ,techniques: radial velocities ,Cluster (physics) ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,Astrophysics::Galaxy Astrophysics ,[PHYS]Physics [physics] ,Physics ,stars: formation ,Techniques: radial velocitie ,010308 nuclear & particles physics ,Velocity dispersion ,Astronomy and Astrophysics ,Stars: kinematics and dynamic ,open clusters and associations: general ,Astrophysics - Astrophysics of Galaxies ,Radial velocity ,Stars ,Star cluster ,Astrophysics - Solar and Stellar Astrophysics ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,techniques: spectroscopic ,Astrophysics::Earth and Planetary Astrophysics ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Open cluster - Abstract
Context. The origin and dynamical evolution of star clusters is an important topic in stellar astrophysics. Several models have been proposed to understand the formation of bound and unbound clusters and their evolution, and these can be tested by examining the kinematical and dynamical properties of clusters over a wide range of ages and masses. Aims. We use the Gaia-ESO Survey products to study four open clusters (IC 2602, IC 2391, IC 4665, and NGC 2547) that lie in the age range between 20 and 50 Myr. Methods. We employ the gravity index $\gamma$ and the equivalent width of the lithium line at 6708 $\AA$, together with effective temperature $\rm{T_{eff}}$, and the metallicity of the stars in order to discard observed contaminant stars. Then, we derive the cluster radial velocity dispersions $\sigma_c$, the total cluster mass $\rm{M}_{tot}$, and the half mass radius $r_{hm}$. Using the $Gaia$-DR1 TGAS catalogue, we independently derive the intrinsic velocity dispersion of the clusters from the astrometric parameters of cluster members. Results. The intrinsic radial velocity dispersions derived by the spectroscopic data are larger than those derived from the TGAS data, possibly due to the different masses of the considered stars. Using $\rm{M}_{tot}$ and $r_{hm}$ we derive the virial velocity dispersion $\sigma_{vir}$ and we find that three out of four clusters are supervirial. This result is in agreement with the hypothesis that these clusters are dispersing, as predicted by the "residual gas expulsion" scenario. However, recent simulations show that the virial ratio of young star clusters may be overestimated if it is determined using the global velocity dispersion, since the clusters are not fully relaxed., Comment: 14 pages, 6 figures
- Published
- 2018
- Full Text
- View/download PDF
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