Año de inicio
1994
Unidad organizativa
Institución organizadora
Subvenciones relacionadas:
General
Descripción
El Proyecto se estructura en dos partes, diferenciadas pero complementarias: morfología y dinámica. El estudio detallado de la morfología de la Vía Láctea pretende proveer una base de datos de distribución estelar en las regiones más alejadas y extintas de nuestra Galaxia, mediante el desarrollo de modelos semiempíricos a partir de la información contenida en dichos catálogos. Por otra parte, los análisis cinemáticos y dinámicos pretenden hacernos entender el origen de esos rasgos que observamos.
Nuestro grupo ha utilizado la combinación de datos propios (que incluirán en el futuro observaciones espectroscópicas con GRANTECAN/EMIR) con los catálogos públicos fotométricos (DENIS, 2MASS, UKIDSS, VISTA en infrarrojo cercano o SDSS) o espectroscópicos (SDSS-APOGEE en infrarrojo cercano, LAMOST). Se cuenta con información detallada de la distribución estelar de las poblaciones dominantes en una amplia zona de cielo, abarcando diferentes componentes estructurales: bulbo triaxial, barra larga, disco, brazos espirales, etc. Las componentes de gas y polvo son también objeto de estudio en infrarrojo, o en microondas (estudios de contaminación Galáctica al fondo cósmico de microondas, por ejemplo con WMAP o PLANCK). El grupo de investigación se ha integrado también en el nodo español de Gaia con la idea de orientar parte de nuestro trabajo en el aprovechamiento científico de la misión y, en concreto, en la identificación y estudio de poblaciones estelares a gran escala en la Galaxia.
Miembros
Investigador principal
Martín
López Corredoira
Personal del proyecto
Terence John
Mahoney
Carlos Manuel
Gutiérrez de La Cruz
Nieves D. Castro Rodríguez
Antonio L. Cabrera Lavers
Francisco
Garzón López
Alina
Streblyanska
Colaboradores
Dr.
P.L. Hammersley
Dr.
C. González Fernández
Dr.
J. Molgó Sendra
Dr.
F. Sylos-Labini
Resultados
- Disco de la Vía Láctea mucho mayor de lo que se pensaba. Ver nota de prensa del IAC: http://www.iac.es/divulgacion.php?op1=16&id=1385
Actividad científica
Publicaciones relacionadas
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Vertical velocities from proper motions of red clump giantsAims: We derive the vertical velocities of disk stars in the range of Galactocentric radii of R = 5 - 16 kpc within 2 kpc in height from the Galactic plane. This kinematic information is connected to dynamical aspects in the formation and evolution of the Milky Way, such as the passage of satellites and vertical resonance and determines whether theLópez-Corredoira, M. et al.
Fecha de publicación:
122014 -
Optical Study of the Hyper-luminous X-Ray Source 2XMM J011942.7+032421We present the identification and characterization of the optical counterpart to 2XMM J011942.7+032421, one of the most luminous and distant ultra-luminous X-ray sources (ULXs). The counterpart is located near a star-forming region in a spiral arm of the galaxy NGC 470 with u, g, and r magnitudes of 21.53, 21.69, and 21.71 mag, respectively. TheGutiérrez, C. M. et al.
Fecha de publicación:
122014 -
On the dust content of galaxy clustersContext. Most of the contribution to dust emission in clusters of galaxies comes from late-type galaxies. However, several ejection processes of material from these galaxies could introduce dust in the intracluster media. Even a relatively low abundance of this dust could act as an efficient cooling agent and have a relevant role in the evolutionGutiérrez, C. M. et al.
Fecha de publicación:
112014 -
Three-dimensional decomposition of galaxies with bulge and long barContext. Some observations indicate that the Milky Way has two inner components, a bulge and a long bar, which present a misalignment of Δα ≃ 20° that is against the predictions of some theoretical models that are based on numerical simulations. Aims: We wish to determine whether this misalignment between the bar and the bulge can be observed inCompère, P. et al.
Fecha de publicación:
112014 -
Dynamical evolution of two associated galactic barsWe study the dynamical interactions of mass systems in equilibrium under their own gravity that mutually exert and experience gravitational forces. The method we employ is to model the dynamical evolution of two isolated bars, hosted within the same galactic system, under their mutual gravitational interaction. In this study, we present anGarzón, F. et al.
Fecha de publicación:
102014 -
Flare in the Galactic stellar outer disc detected in SDSS-SEGUE dataAims: We explore the outer Galactic disc up to a Galactocentric distance of ≈30 kpc to derive its parameters and measure the magnitude of its flare. Methods: We obtained the 3D density of stars of type F8V-G5V with a colour selection from extinction-corrected photometric data of the Sloan Digital Sky Survey - Sloan Extension for GalacticLópez-Corredoira, M. et al.
Fecha de publicación:
72014 -
The triggering mechanism and properties of ionized outflows in the nearest obscured quasarsWe have identified ionized outflows in the narrow-line region of all but one Sloan Digital Sky Survey type 2 quasars (QSO2) at z≲0.1 (20/21, detection rate 95 per cent), implying that this is a ubiquitous phenomenon in this object class also at the lowest z. The outflowing gas has high densities (ne≳1000 cm-3) and covers a region the size of a fewVillar Martín, M. et al.
Fecha de publicación:
42014 -
Milky Way rotation curve from proper motions of red clump giantsAims: We derive the stellar rotation curve of the Galaxy in the range of Galactocentric radii of R = 4-16 kpc at different vertical heights from the Galactic plane of z between -2 and +2 kpc. With this we reach high Galactocentric distances in which the kinematics is poorly known due mainly to uncertainties in the distances to the sources. MethodsLópez-Corredoira, M.
Fecha de publicación:
32014 -
Infrared Extinction in the Inner Milky Way through Red Clump GiantsWhile the shape of the extinction curve in the infrared is considered to be set and the extinction ratios between infrared bands are usually taken to be approximately constant, a number of recent studies point to either a spatially variable behavior of the exponent of the power law or a different extinction law altogether. In this paper, we proposeHammersley, P. L. et al.
Fecha de publicación:
22014 -
The long bar as seen by the VVV Survey. II. Star countsContext. There is still some debate about the presence and the morphological properties of the long bar in the inner Galaxy. Aims: We investigate the morphological properties of the long Galactic bar using the VVV survey extending star counts at least 3 mag deeper than 2MASS. Our study covers the relatively unexplored negative longitudes of theAmôres, E. B. et al.
Fecha de publicación:
112013 -
Discovery of the Broad-lined Type Ic SN 2013cq Associated with the Very Energetic GRB 130427ALong-duration gamma-ray bursts (GRBs) at z 1 are found in most cases to be accompanied by bright, broad-lined Type Ic supernovae (SNe Ic-BL). The highest-energy GRBs are mostly located at higher redshifts, where the associated SNe are hard to detect observationally. Here, we present early and late observations of the optical counterpart of thede Ugarte Postigo, A. et al.
Fecha de publicación:
102013 -
Multiwavelength Observations of the Black Hole Transient XTE J1752–223 during Its 2010 Outburst DecayGalactic black hole transients show many interesting phenomena during outburst decays. We present simultaneous X-ray (RXTE, Swift, and INTEGRAL), and optical/near-infrared (O/NIR) observations (SMARTS) of the X-ray transient XTE J1752–223 during its outburst decay in 2010. The multiwavelength observations over 150 days in 2010 cover the transitionChun, Y. Y. et al.
Fecha de publicación:
62013 -
Luminosity-colour relations for red clump starsWe calibrated the absolute magnitudes M V , M J , M_{Ks} and M g of red clump stars in terms of colours. M V and M g are strongly dependent on colour, while the dependence of M J and M_{Ks} on colour is rather weak. The calibration of the absolute magnitudes M V and M_{Ks} is tested on 101 RC stars in the field SA 141. The Galactic model parametersÇakmak, H. et al.
Fecha de publicación:
42013 -
Five fake ultra-luminous X-ray sourcesContext. The nature of ultra-luminous X-ray (ULX) sources is still a matter of debate. Studies of their counterparts in other spectral ranges will help to clarify the nature of those sources. Aims: Our goal was to identify and characterize the optical counterparts of five sources catalogued as ULXs. Methods: We obtained optical imaging andGutiérrez, C. M.
Fecha de publicación:
12013 -
Stars and brown dwarfs in the σ Orionis cluster. III. OSIRIS/GTC low-resolution spectroscopy of variable sourcesContext. Although many studies have been performed so far, there are still dozens of low-mass stars and brown dwarfs in the young σ Orionis open cluster without detailed spectroscopic characterisation. Aims: We look for unknown strong accretors and disc hosts that were undetected in previous surveys. Methods: We collected low-resolutionCaballero, J. A. et al.
Fecha de publicación:
102012 -
The long bar as seen by the VVV survey. I. Colour-magnitude diagramsContext. The VISTA Variable Survey (VVV) is able to map the Galaxy at l ≤ 0° with an unpaired depth (at least 3 mag deeper than 2MASS), opening new possibilities for studying the inner structure of the Milky Way. Aims: In this paper we concentrate on the exploitation of these data to better understand the spatial disposition and distribution of theGonzález-Fernández, C. et al.
Fecha de publicación:
102012 -
Deep blank-field catalogue for medium- and large-sized telescopesThe observation of blank fields, defined as regions of the sky that are devoid of stars down to a given threshold magnitude, constitutes one of the most relevant calibration procedures required for the proper reduction of astronomical data obtained following typical observing strategies. In this work, we have used Delaunay triangulation to searchJiménez Esteban, F. M. et al.
Fecha de publicación:
112012 -
Spectroscopy and multiband photometry of the afterglow of intermediate duration γ-ray burst GRB 040924 and its host galaxyAims: We present optical photometry and spectroscopy of the afterglow and host galaxy of gamma-ray burst GRB 040924. This GRB had a rather short duration of T90 ~2.4 s, and a well sampled optical afterglow light curve. We aim to use this dataset to find further evidence that this burst is consistent with a massive star core-collapse progenitorWiersema, K. et al.
Fecha de publicación:
42008 -
Near-IR spectra of inner red giants (Gonzalez-Fernandez+, 2008)From the equivalent widths of the main features of the K band spectra (the NaI, CaI and CO bandheads) we have derived the metallicities of the sources by means of the empirical scale obtained by Ramirez et al. (2000AJ....120..833R) and Frogel et al. (2001AJ....122.1896F) for luminous red giants. (2 data files).Gonzalez-Fernandez, C. et al.
Fecha de publicación:
22008 -
2MASS, SDSS and BVRI photometry for 825 stars (Bilir+, 2008)We present colour transformations for the conversion of the 2MASS photometric system to the Johnson-Cousins UBVRI system and further into the SDSS ugriz system. We have taken SDSS gri magnitudes of stars measured with the 2.5-m telescope from SDSS Data Release 5 (DR5), and BVRI and JHKs magnitudes from Stetson's catalogue (available at http://www2Bilir, S. et al.
Fecha de publicación:
72008
