Año de inicio
2006
Unidad organizativa
Institución organizadora
Subvenciones relacionadas:
General
Descripción
Bienvenida a la página web del grupo de investigación Traces of Galaxy Formation.
Somos un grupo de investigación amplio, diverso y muy activo cuyo objetivo principal es entender la formación de galaxias en el Universo de una manera lo más completa posible. Con el estudio detellado de las poblaciones estelares como bandera, estamos constantemente buscando y desarrollando nuevas herramientas e ideas que nos permitan entender cómo las galaxias han llegado a convertirse en lo que hoy observamos.
Una historia de formación compleja, como la que se espera describa la evolución de las galaxias, necesita de un acercamiento multidisciplinar para ser entendida. Nuestro grupo en el IAC está compuesto por personal investigador de gran experiencia en simulaciones cosmológicas, estudios dinámicos, análisis de poblaciones estelares y caracterizaciones morfológicas de galaxias tanto locales como a alto corrimiento al rojo. Combinamos distintas alternativas (e.g. observaciones y teoría o procesos de evolución secular y cosmológica) para poder alcanzar en los próximos años una visión consistente de los mecanismos físicos que regulan la formación de las galaxias.
Dentro de este esquema general, estamos principalmente centrados en el estudio de tres líneas centrales:
- Modelos de síntesis de poblaciones estelares
- Desarrollo de modelos de poblaciones estelares
- Métodos de análisis para el estudio de poblaciones estelares
- Universalidad de la función inicial de masa (IMF)
- Evolución cósmica de galaxias
- Evolución de galaxias masivas
- Poblaciones estelares en distintos entornos
- Ciencia a bajo brillo superficial
- Simulaciones númericas y aprendizaje automático
- Procesos evolutivos en galaxias cercanas
- Agujeros negros como moduladores de la formación estelar
- Cartogrtafiados locales
- Cinemática estelar y modelos dinámicos
Si quieres ponerte en contacto o trabajar con el grupo, por favor, envía un correo al investigador principal (Ignacio Martín-Navarro ignacio.martin [at] iac.es (ignacio[dot]martin[at]iac[dot]es)).
Miembros
Investigador principal
Ignacio
Martín Navarro
Personal del proyecto
Ignacio
Trujillo Cabrera
Alexandre
Vazdekis Vazdekis
Ignacio Alfonso
Ferreras Páez
Jesús
Falcón Barroso
Marc
Huertas-Portocarrero Company
Adriana de
Lorenzo-Cáceres Rodríguez
Anna
Ferré Mateu
Mireia
Montes Quiles
Regina
Sarmiento
Iveth Adaena
Gaspar Gorostieta
Eirini
Angeloudi
Giulia
Golini
Laura Elizabeth
Scholz Díaz
Pablo
Rodríguez Beltrán
Resultados
Esta es una muestra de algunos de nuestros resultados destacados más recientes:
- Local variations of the stellar velocity ellipsoid - II. The effect of the bar in the inner regions of Auriga galaxies. Walo et al. 2022, MNRAS (https://ui.adsabs.harvard.edu/abs/2022MNRAS.513.4587W)
- Anisotropic satellite galaxy quenching modulated by black hole activity. Martín-Navarro et al. 2021, Nature (https://ui.adsabs.harvard.edu/abs/2021Natur.594..187M)
- Evaluating hydrodynamical simulations with green valley galaxies. Angthopo et al. 2021, MNRAS (https://ui.adsabs.harvard.edu/abs/2021MNRAS.502.3685A)
- Sub one per cent mass fractions of young stars in red massive galaxies. Salvador-Rusiñol et al. 2020, Nature Astronomy (https://ui.adsabs.harvard.edu/abs/2020NatAs...4..252S)
- Detection of young stellar populations in apparently quenched low-mass galaxies using red spectral line indices. de Lorenzo-Cáceres et al. 2020, MNRAS (https://ui.adsabs.harvard.edu/abs/2020MNRAS.498.1002D)
Actividad científica
Publicaciones relacionadas
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Exploring the Evolutionary Paths of the Most Massive Galaxies since z ~ 2We use Spitzer MIPS data from the FIDEL Legacy Project in the extended Groth strip to analyze the stellar mass assembly of massive (M>1011 Msolar) galaxies at z 1, and more pronouncedly at z>1.3, the median specific SFRs of the disks and spheroids detected by MIPS are very similar, ranging from 0.1 to 1 Gyr-1 (SFR=10-200 Msolar yr-1). We estimatePérez-González, Pablo G. et al.
Fecha de publicación:
112008 -
A Petal of the Sunflower: Photometry of the Stellar Tidal Stream in the Halo of Messier 63 (NGC 5055)We present deep surface photometry of a very faint, giant arc-loop feature in the halo of the nearby spiral galaxy NGC 5055 (M63) that is consistent with being a part of a stellar stream resulting from the disruption of a dwarf satellite galaxy. This faint feature was first detected in early photographic studies by van der Kruit; more recently, inChonis, Taylor S. et al.
Fecha de publicación:
112011 -
UBV(RI)C photometry of the open clusters Be 15, Be 80 and NGC 2192The three open clusters Be 15, Be 80 and NGC 2192 have been observed using CCD UBV(RI)C photometry at the San Pedro Mártir Observatory, México within the framework of our open-cluster survey. The fundamental parameters of interstellar reddening, distance and age have been derived, and also the metallicity for NGC 2192 (solar metallicity has beenTapia, M. T. et al.
Fecha de publicación:
12010 -
Hubble Space Telescope study of resolved red giant stars in the outer halos of nearby dwarf starburst galaxiesContext. Central starbursts in galaxies are an extreme example of ongoing galaxy evolution. The outer parts of galaxies contain a fossil record of galaxy formation and evolution processes in the more distant past. The characterization of resolved stellar populations allows one a detailed study of these topics. Aims: We observed the outer parts ofRyś, A. et al.
Fecha de publicación:
62011 -
Satellites around massive galaxies since z˜ 2The accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of massive galaxies over cosmic time. Using a sample of 629 massive (Mstar˜ 1011 M&sun;) galaxies from the near-infrared Palomar/DEEP-2 survey, we explore what fraction of these objects have satellites with 0.01 MsatMármol-Queraltó, E. et al.
Fecha de publicación:
52012 -
Evidence for Intermediate-Age Stellar Populations in Early-Type Galaxies from K-Band SpectroscopyThe study of stellar populations in early-type galaxies in different environments is a powerful tool for constraining their star formation histories. This study has been traditionally restricted to the optical range, where dwarfs around the turn-off and stars at the base of the red giant branch dominate the integrated light at all ages. The nearMármol-Queraltó, E. et al.
Fecha de publicación:
112009 -
Dwarf galaxies in the Coma cluster - I. Velocity dispersion measurementsWe present the study of a large sample of early-type dwarf galaxies in the Coma cluster observed with DEIMOS on the Keck II to determine their internal velocity dispersion. We focus on a subsample of 41 member dwarf elliptical galaxies for which the velocity dispersion can be reliably measured, 26 of which were studied for the first time. TheKourkchi, E. et al.
Fecha de publicación:
32012 -
A new stellar library in the region of the CO index at 2.3 μm. New index definition and empirical fitting functionsContext: The analysis of unresolved stellar populations demands evolutionary synthesis models with realistic physical ingredients and extended wavelength coverage. Aims: We quantitatively describe the first CO bandhead at 2.3 μm to allow stellar population models to provide improved predictions in this wavelength range. Methods: We observed a newMármol-Queraltó, E. et al.
Fecha de publicación:
102008 -
Analysis of possible anomalies in the QSO distribution of the Flesch & Hardcastle catalogueAims:A recent catalogue by Flesch & Hardcastle presents two major anomalies in the spatial distribution of QSO candidates: i) an apparent excess of such objects near bright galaxies, and ii) an excess of very bright QSO candidates compared to random background expectations in several regions of the sky. Because anyone of these anomalies would beLópez-Corredoira, M. et al.
Fecha de publicación:
32008 -
Stellar Tidal Streams in Spiral Galaxies of the Local Volume: A Pilot Survey with Modest Aperture TelescopesWithin the hierarchical framework for galaxy formation, minor merging and tidal interactions are expected to shape all large galaxies to the present day. As a consequence, most seemingly normal disk galaxies should be surrounded by spatially extended stellar "tidal features" of low surface brightness. As part of a pilot survey for such interactionMartínez-Delgado, D. et al.
Fecha de publicación:
102010 -
HerMES: SPIRE detection of high-redshift massive compact galaxies in GOODS-N fieldWe have analysed the rest-frame far-infrared properties of a sample of massive (M* > 1011Msolar) galaxies at 2Cava, A. et al.
Fecha de publicación:
112010 -
Dwarfs Gobbling Dwarfs: A Stellar Tidal Stream around NGC 4449 and Hierarchical Galaxy Formation on Small ScalesA candidate diffuse stellar substructure was previously reported in the halo of the nearby dwarf starburst galaxy NGC 4449 by Karachentsev et al. We map and analyze this feature using a unique combination of deep integrated-light images from the BlackBird 0.5 m telescope, and high-resolution wide-field images from the 8 m Subaru Telescope, whichMartínez-Delgado, David et al.
Fecha de publicación:
42012 -
Young ages and other intriguing properties of massive compact galaxies in the local UniverseWe characterize the kinematics, morphology, stellar populations and star formation histories of a sample of massive compact galaxies in the nearby Universe, which might provide a closer look at the nature of their high-redshift (z >rsim 1.0) massive counterparts. We find that nearby compact massive objects show elongated morphologies and are fastFerré-Mateu, A. et al.
Fecha de publicación:
62012 -
Ultra-deep Sub-kiloparsec View of nearby Massive Compact GalaxiesUsing Gemini North telescope ultra-deep and high-resolution (sub-kiloparsec) K-band adaptive optics imaging of a sample of four nearby (z ~ 0.15) massive (~1011 M &sun;) compact (R 1.5 kpc) galaxies, we have explored the structural properties of these rare objects with unprecedented detail. Our surface brightness profiles expand over 12 mag inTrujillo, I. et al.
Fecha de publicación:
52012 -
The SDSS-UKIDSS Fundamental Plane of Early-Type GalaxiesWe derive the fundamental plane (FP) relation for a sample of 1430 early-type galaxies in the optical (r band) and the near-infrared (K band), by combining SDSS and UKIDSS data. With such a large, homogeneous data set, we are able to assess the dependence of the FP on the wave band. Our analysis indicates that the FP of luminous early-type galaxiesLa Barbera, F. et al.
Fecha de publicación:
122008 -
The SAURON project - XXI. The spatially resolved UV-line strength relations of early-type galaxiesThe unexpected rising flux of early-type galaxies at decreasing ultraviolet (UV) wavelengths is a long-standing mystery. One important observational constraint is the correlation between UV-optical colours and Mg2 line strengths found by Burstein et al. The simplest interpretation of this phenomenon is that the UV strength is related to the Mg lineJeong, Hyunjin et al.
Fecha de publicación:
62012 -
The SAURON project - XX. The Spitzer [3.6] - [4.5] colour in early-type galaxies: colours, colour gradients and inverted scaling relationsWe investigate the [3.6]-[4.5] Spitzer-IRAC colour behaviour of the early-type galaxies of the SAURON survey, a representative sample of 48 nearby ellipticals and lenticulars. We investigate how this colour, which is unaffected by dust extinction, can be used to constrain the stellar populations in these galaxies. We find a tight relation betweenPeletier, Reynier F. et al.
Fecha de publicación:
12012 -
The SAURON project - XVII. Stellar population analysis of the absorption line strength maps of 48 early-type galaxiesWe present a stellar population analysis of the absorption line strength maps for 48 early-type galaxies from the SAURON sample. Using the line strength index maps of Hβ, Fe5015 and Mgb, measured in the Lick/IDS system and spatially binned to a constant signal-to-noise ratio, together with predictions from up-to-date stellar population models, weKuntschner, Harald et al.
Fecha de publicación:
102010 -
The SAURON project - XVI. On the sources of ionization for the gas in elliptical and lenticular galaxiesFollowing our study on the incidence, morphology and kinematics of the ionized gas in early-type galaxies, we now address the question of what is powering the observed nebular emission. To constrain the likely sources of gas excitation, we resort to a variety of ancillary data we draw from complementary information on the gas kinematics, stellarSarzi, Marc et al.
Fecha de publicación:
32010 -
The SAURON project - XV. Modes of star formation in early-type galaxies and the evolution of the red sequenceWe combine SAURON integral field data of a representative sample of local early-type, red sequence galaxies with Spitzer/Infrared Array Camera imaging in order to investigate the presence of trace star formation in these systems. With the Spitzer data, we identify galaxies hosting low-level star formation, as traced by polycyclic aromaticShapiro, Kristen L. et al.
Fecha de publicación:
32010
