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
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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Diagonal Ridge Pattern of Different Age Populations Found in Gaia-DR2 with LAMOST Main-sequence Turnoff and OB-type StarsWe revisit the diagonal ridge feature (diagonal distributions in the R, v φ plane) found in Gaia and present a timing analysis for it between Galactocentric distances of R = 7.5 and 12 kpc, using main-sequence turnoff and OB stars selected from the LAMOST Galactic spectroscopic surveys. We recover the ridge pattern in the R-v φ plane color coded byWang, H. -F. et al.
Fecha de publicación:
102020 -
Gaia-DR2 extended kinematical maps. III. Rotation curves analysis, dark matter, and MOND testsContext. Recent statistical deconvolution methods have produced extended kinematical maps in a range of heliocentric distances that are a factor of two to three larger than those analysed in Gaia Collaboration (2018, A&A, 616, A11) based on the same data. Aims: In this paper, we use such maps to derive the rotation curve both in the Galactic planeChrobáková, Ž. et al.
Fecha de publicación:
102020 -
The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data ReleaseWe present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog comprises the largest selection of spectroscopically confirmed quasars to date. The full catalog includes two subcatalogs (the current versions are DR16Q_v4 and DR16Q_SupersetLyke, Brad W. et al.
Fecha de publicación:
92020 -
Mapping the Galactic Disk with the LAMOST and Gaia Red Clump Sample. VI. Evidence for the Long-lived Nonsteady Warp of Nongravitational ScenariosBy combining LAMOST DR4 and Gaia DR2 common red clump stars with age and proper motion, we analyze the amplitude evolution of the stellar warp independently of any assumption with a simple model. The greatest height of the warp disk increases with galactocentric distance in different populations and is dependent on age: the younger stellarWang, H. -F. et al.
Fecha de publicación:
72020 -
Structure of the outer Galactic disc with Gaia DR2Context. The structure of outer disc of our Galaxy is still not well described, and many features need to be better understood. The second Gaia data release (DR2) provides data in unprecedented quality that can be analysed to shed some light on the outermost parts of the Milky Way. Aims: We calculate the stellar density using star counts obtainedChrobáková, Ž. et al.
Fecha de publicación:
52020 -
Peculiar emission line spectra of core extremely red BOSS quasars at z̃2-3: orientation and/or evolution?Context. Core extremely red quasars (core ERQ) have been proposed to represent an intermediate evolutionary phase in which a heavily obscured quasar blows out the circumnuclear interstellar medium with very energetic outflows before it becomes an optical quasar. Aims: We investigate whether the properties of core ERQ fit the AGN orientation-basedVillar Martín, M. et al.
Fecha de publicación:
22020 -
Gaia-DR2 extended kinematical maps. II. Dynamics in the Galactic disk explaining radial and vertical velocitiesContext. In our Paper I, by using statistical deconvolution methods, extended kinematics maps of Gaia-DR2 data have been produced in a range of heliocentric distances that are a factor of two to three larger than those analyzed previously by the Gaia Collaboration with the same data. It added the range of Galactocentric distances between 13 kpc andLópez-Corredoira, M. et al.
Fecha de publicación:
22020 -
Searching for optical companions to four binary millisecond pulsars with the Gran Telescopio CanariasWe report on multiband photometric observations of four binary millisecond pulsars with the Gran Telescopio Canarias. The observations led to detection of binary companions to PSRs J1630+3734, J1741+1351, and J2042+0246 in the Sloan g', r', and i' bands. Their magnitudes in the r' band are ≈24.4, 24.4, and 24.0, respectively. We also set a 3σ upperKirichenko, A. Yu et al.
Fecha de publicación:
22020 -
Mapping the Galactic disc with the LAMOST and Gaia red clump sample: II. 3D asymmetrical kinematics of mono-age populations in the disc between 6-14 kpcWe perform analysis of the 3D kinematics of Milky Way disc stars in mono-age populations. We focus on stars between Galactocentric distances of R = 6 and 14 kpc, selected from the combined LAMOST Data Release 4 (DR4) red clump giant stars and Gaia DR2 proper motion catalogue. We confirm the 3D asymmetrical motions of recent works and provide timeWang, H. -F. et al.
Fecha de publicación:
12020 -
Mapping the Galactic Disk with the LAMOST and Gaia Red Clump Sample. III. A New Velocity Substructure and Time Stamps of the Galactic Disk Asymmetry in the Disk between 12 and 15 kpcWe investigate the three-dimensional asymmetrical kinematics and present time stamps of the Milky Way disk between Galactocentric distances of R = 12 and 15 kpc, using red clump stars selected from the LAMOST Galactic survey, also with proper motion measurements provided by the Gaia DR2. We discover velocity substructure above the Galactic planeWang, Hai-Feng et al.
Fecha de publicación:
102019 -
Stars and brown dwarfs in the σ Orionis cluster. IV. IDS/INT and OSIRIS/GTC spectroscopy and Gaia DR2 astrometryContext. Only a few open clusters are as important for the study of stellar and substellar objects, and their formation and evolution, as the young σ Orionis cluster. However, a complete spectroscopic characterisation of its whole stellar population is still missing. Aims: We filled most of that gap with a large spectroscopic and astrometric surveyCaballero, J. A. et al.
Fecha de publicación:
92019 -
The Vanishing and Appearing Sources during a Century of Observations Project. I. USNO Objects Missing in Modern Sky Surveys and Follow-up Observations of a “Missing Star”In this paper we report the current status of a new research program. The primary goal of the “Vanishing and Appearing Sources during a Century of Observations” project is to search for vanishing and appearing sources using existing survey data to find examples of exceptional astrophysical transients. The implications of finding such objects extendVillarroel, B. et al.
Fecha de publicación:
12020 -
Optical validation and characterization of Planck PSZ2 sources at the Canary Islands observatories. I. First year of LP15 observationsAims: The second catalogue of Planck Sunyaev-Zeldovich (SZ) sources, hereafter PSZ2, is the largest sample of galaxy clusters selected through their SZ signature in the full sky. At the time of publication, 21% of these objects had no known counterpart at other wavelengths. Using telescopes at the Canary Island observatories, we conducted the longStreblyanska, A. et al.
Fecha de publicación:
82019 -
Distribution of red clump stars does not support the X-shaped Galactic bulgeContext. Claims of an X-shaped Galactic bulge were based on the assumption of red clump stars as standard candles in some lines of sight crossing the off-plane bulge. However, some doubts have been cast on whether the two peaks in star counts along the line of sight really represent a double peak in the density distribution, or whether there isLópez-Corredoira, M. et al.
Fecha de publicación:
72019 -
QSO2 outflow characterization using data obtained with OSIRIS at the Gran Telescopio CanariasContext. Ionized outflows are ubiquitous in non-radio-loud obscured quasars (QSO2s) at different redshifts. However, the actual size of the outflows and their efficiency for gas ejection and star formation truncation are controversial. Large-scale (exceeding several kiloparsec) extended radio structures might be necessary to identify (even toBellocchi, Enrica et al.
Fecha de publicación:
62019 -
Mass functions, luminosity functions, and completeness measurements from clustering redshiftsThis paper presents stellar mass functions and i-band luminosity functions for Sloan Digital Sky Survey (SDSS) galaxies with i 21 using clustering redshifts. From these measurements, we also compute targeting completeness measurements for the Baryon Oscillation Spectroscopic Survey (BOSS). Clustering redshifts is a method of obtaining the redshiftBates, D. J. et al.
Fecha de publicación:
72019 -
The new 4-m robotic telescopeWe present a project to build a 4-m-diameter telescope (New Robotic Telescope [NRT]) with fully robotic operation. The telescope will be sited at the Observatory of Roque de los Muchachos in the island of La Palma (Spain). When it enters into operation in 5 years' time, it will be likely the largest robotic telescope in the world. This, inGutiérrez, C. M. et al.
Fecha de publicación:
12019 -
The ultracool helium-atmosphere white dwarf companion of PSR J0740+6620?We report detection of the likely companion of the binary millisecond pulsar (MSP) J0740+6620 with the Gran Telescopio Canarias in the r' and i' bands. The position of the detected starlike source coincides with the pulsar coordinates within the 1σ uncertainty of ≈0.2 arcsec. Its magnitudes are r' = 26.51 ± 0.17 and i' = 25.49 ± 0.15. Comparing theBeronya, D. M. et al.
Fecha de publicación:
52019 -
Nonaxisymmetric models of galaxy velocity mapsGalaxy velocity mapsoften show the typical pattern of a rotating disk, consistent with the dynamical model where emitters rotate in circular orbits around the galactic center. The simplest template used to fit these maps consists in the rotating disk model (RDM) where the amplitude of circular velocities is fixed by the observed velocity profileSylos Labini, F. et al.
Fecha de publicación:
22019 -
Gaia-DR2 extended kinematical maps . I. Method and applicationContext. The Gaia Collaboration has used Gaia-DR2 sources with six-dimensional (6D) phase space information to derive kinematical maps within 5 kpc of the Sun, which is a reachable range for stars with relative error in distance lower than 20%. Aims: Here we aim to extend the range of distances by a factor of two to three, thus adding the range ofLópez-Corredoira, M. et al.
Fecha de publicación:
12019
