Huellas de la Formación de las Galaxias: Poblaciones estelares, Dinámica y Morfología

    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:

    1. 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)
       
    2. Evolución cósmica de galaxias
      • Evolución de galaxias masivas
      • Poblaciones estelares en distintos entornos
      • Ciencia a bajo brillo superficial
      • Simulaciones númericas y aprendizaje automático
       
    3. 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).

    Esta es una muestra de algunos de nuestros resultados destacados más recientes:

    Publicaciones relacionadas

    • Keck spectroscopy of NGC 1052-DF9: stellar populations in the context of the NGC 1052 group

      In this study, we use Keck/Keck Cosmic Web Imager spectroscopy to measure the age, metallicity, and recessional velocity of NGC 1052-DF9 (DF9), a dwarf galaxy in the NGC 1052 group. We compare these properties to those of two other galaxies in the group, NGC 1052-DF2 and NGC 1052-DF4, which have low dark matter content. The three galaxies are

      Gannon, Jonah S. et al.

      Fecha de publicación:

      9
      2023
      Número de citas
      1
    • Euclid preparation. XXVI. The Euclid Morphology Challenge: Towards structural parameters for billions of galaxies

      The various Euclid imaging surveys will become a reference for studies of galaxy morphology by delivering imaging over an unprecedented area of 15 000 square degrees with high spatial resolution. In order to understand the capabilities of measuring morphologies from Euclid-detected galaxies and to help implement measurements in the pipeline of the

      Euclid Collaboration et al.

      Fecha de publicación:

      3
      2023
      Número de citas
      7
    • The massive relic galaxy NGC 1277 is dark matter deficient. From dynamical models of integral-field stellar kinematics out to five effective radii

      According to the Λ cold dark matter (ΛCDM) cosmology, present-day galaxies with stellar masses M⋆ > 1011 M⊙ should contain a sizable fraction of dark matter within their stellar body. Models indicate that in massive early-type galaxies (ETGs) with M⋆ ≈ 1.5 × 1011 M⊙, dark matter should account for ∼15% of the dynamical mass within one effective

      Comerón, Sébastien et al.

      Fecha de publicación:

      7
      2023
      Número de citas
      13
    • Spectroscopic Confirmation of CEERS NIRCam-selected Galaxies at z ≃ 8-10

      We present JWST/NIRSpec prism spectroscopy of seven galaxies selected from Cosmic Evolution Early Release Science (CEERS) survey NIRCam imaging with photometric redshifts z phot > 8. We measure emission line redshifts of z = 7.65 and 8.64 for two galaxies. For two other sources without securely detected emission lines we measure $z={9.77}_{-0.29}^{

      Arrabal Haro, Pablo et al.

      Fecha de publicación:

      7
      2023
      Número de citas
      68
    • Effect of the initial mass function on the dynamical SMBH mass estimate in the nucleated early-type galaxy FCC 47

      Supermassive black holes (SMBHs) and nuclear star clusters (NSCs) co-exist in many galaxies. While the formation history of the black hole is essentially lost, NSCs preserve their evolutionary history imprinted onto their stellar populations and kinematics. Studying SMBHs and NSCs in tandem might help us to ultimately reveal the build-up of galaxy

      Thater, Sabine et al.

      Fecha de publicación:

      7
      2023
      Número de citas
      1
    • ERGO-ML: towards a robust machine learning model for inferring the fraction of accreted stars in galaxies from integral-field spectroscopic maps

      Quantifying the contribution of mergers to the stellar mass of galaxies is key for constraining the mechanisms of galaxy assembly across cosmic time. However, the mapping between observable galaxy properties and merger histories is not trivial: cosmological galaxy simulations are the only tools we have for calibration. We study the robustness of a

      Angeloudi, Eirini et al.

      Fecha de publicación:

      8
      2023
      Número de citas
      4
    • CEERS Key Paper. VI. JWST/MIRI Uncovers a Large Population of Obscured AGN at High Redshifts

      Mid-infrared (mid-IR) observations are powerful in identifying heavily obscured active galactic nuclei (AGN) that have weak emission in other wavelengths. Data from the Mid-Infrared Instrument (MIRI) on board the James Webb Space Telescope provides an excellent opportunity to perform such studies. We take advantage of the MIRI imaging data from the

      Yang, G. et al.

      Fecha de publicación:

      6
      2023
      Número de citas
      21
    • sMILES SSPs: a library of semi-empirical MILES stellar population models with variable [α/Fe] abundances

      We present a new library of semi-empirical stellar population models that are based on the empirical MILES and semi-empirical sMILES stellar libraries. The models span a large range of age and metallicity, in addition to an [α/Fe] coverage from -0.2 to +0.6 dex, at MILES resolution (FWHM = $2.5\,$ Å) and wavelength coverage ($3540.5-7409.6\,$ Å)

      Knowles, Adam T. et al.

      Fecha de publicación:

      8
      2023
      Número de citas
      3
    • Uncertainty-aware blob detection with an application to integrated-light stellar population recoveries

      Context. Blob detection is a common problem in astronomy. One example is in stellar population modelling, where the distribution of stellar ages and metallicities in a galaxy is inferred from observations. In this context, blobs may correspond to stars born in situ versus those accreted from satellites, and the task of blob detection is to

      Parzer, Fabian et al.

      Fecha de publicación:

      6
      2023
      Número de citas
      1
    • NGC 1436: the making of a lenticular galaxy in the Fornax Cluster

      We study the evolutionary path of the Fornax Cluster galaxy NGC 1436, which is known to be currently transitioning from a spiral into a lenticular morphology. This galaxy hosts an inner star-forming disc and an outer quiescent disc, and we analyse data from the MeerKAT Fornax Survey, ALMA, and the Fornax 3D survey to study the interstellar medium

      Loni, Alessandro et al.

      Fecha de publicación:

      7
      2023
      Número de citas
      2
    • The entropy of galaxy spectra: how much information is encoded?

      The inverse problem of extracting the stellar population content of galaxy spectra is analysed here from a basic standpoint based on information theory. By interpreting spectra as probability distribution functions, we find that galaxy spectra have high entropy, thus leading to a rather low effective information content. The highest variation in

      Ferreras, Ignacio et al.

      Fecha de publicación:

      1
      2023
      Número de citas
      7
    • The MAGPI Survey: impact of environment on the total internal mass distribution of galaxies in the last 5 Gyr

      We investigate the impact of environment on the internal mass distribution of galaxies using the Middle Ages Galaxy Properties with Integral field spectroscopy (MAGPI) survey. We use 2D resolved stellar kinematics to construct Jeans dynamical models for galaxies at mean redshift z ~ 0.3, corresponding to a lookback time of 3-4 Gyr. The internal

      Derkenne, Caro et al.

      Fecha de publicación:

      7
      2023
      Número de citas
      2
    • Identification of tidal features in deep optical galaxy images with convolutional neural networks

      Interactions between galaxies leave distinguishable imprints in the form of tidal features, which hold important clues about their mass assembly. Unfortunately, these structures are difficult to detect because they are low surface brightness features, so deep observations are needed. Upcoming surveys promise several orders of magnitude increase in

      Domínguez Sánchez, H. et al.

      Fecha de publicación:

      5
      2023
      Número de citas
      3
    • MaNGIA: 10 000 mock galaxies for stellar population analysis

      Context. Modern astronomical observations give unprecedented access to the physical properties of nearby galaxies, including spatially resolved stellar populations. However, observations can only give a present-day view of the Universe, whereas cosmological simulations give access to the past record of the processes that galaxies have experienced

      Sarmiento, Regina et al.

      Fecha de publicación:

      5
      2023
      Número de citas
      10
    • Chemical characterisation of the X-shooter Spectral Library (XSL): [Mg/Fe] and [Ca/Fe] abundances

      Context. The X-shooter Spectral Library (XSL) is a large empirical stellar library used as a benchmark for the development of stellar population models. The inclusion of α-element abundances is crucial to disentangling the chemical evolution of any stellar system. Aims: The aim of this paper is to provide a catalogue of high-precision, accurate

      Santos-Peral, P. et al.

      Fecha de publicación:

      4
      2023
      Número de citas
      0
    • The SAMI-Fornax Dwarfs Survey - III. Evolution of [α/Fe] in dwarfs, from Galaxy Clusters to the Local Group

      Using very deep, high spectral resolution data from the SAMI Integral Field Spectrograph, we study the stellar population properties of a sample of dwarf galaxies in the Fornax Cluster, down to a stellar mass of 107 M⊙, which has never been done outside the Local Group. We use full spectral fitting to obtain stellar population parameters. Adding

      Romero-Gómez, J. et al.

      Fecha de publicación:

      6
      2023
      Número de citas
      7
    • CEERS Key Paper. IV. A Triality in the Nature of HST-dark Galaxies

      The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate in unprecedented detail the nature of optical/near-IR-faint, mid-IR-bright sources, with HST-dark galaxies among them. We gather JWST data from the CEERS survey in the Extended Groth Strip, jointly with HST data, and analyze spatially resolved optical

      Pérez-González, Pablo G. et al.

      Fecha de publicación:

      3
      2023
      Número de citas
      65
    • The Fornax3D project: Environmental effects on the assembly of dynamically cold disks in Fornax cluster galaxies

      We apply a population-orbit superposition metho1d to 16 galaxies in the Fornax cluster observed with MUSE/VLT in the context of the Fornax3D project. By fitting the luminosity distribution, stellar kinematics, and age and metallicity maps simultaneously, we obtained the internal stellar orbit distribution, as well as the age and metallicity

      Ding, Y. et al.

      Fecha de publicación:

      4
      2023
      Número de citas
      3
    • Expectations of the Size Evolution of Massive Galaxies at 3 ≤ z ≤ 6 from the TNG50 Simulation: The CEERS/JWST View

      We present a catalog of about 25,000 images of massive (M ⋆ ≥ 109 M ⊙) galaxies at redshifts 3 ≤ z ≤ 6 from the TNG50 cosmological simulation, tailored for observations at multiple wavelengths carried out with JWST. The synthetic images were created with the SKIRT radiative transfer code, including the effects of dust attenuation and scattering

      Costantin, Luca et al.

      Fecha de publicación:

      4
      2023
      Número de citas
      19
    • MIGHTEE-H I: possible interactions with the galaxy NGC 895

      The transformation and evolution of a galaxy is strongly influenced by interactions with its environment. Neutral hydrogen (H I) is an excellent way to trace these interactions. Here, we present H I observations of the spiral galaxy NGC 895, which was previously thought to be isolated. High-sensitivity H I observations from the MeerKAT large survey

      Namumba, B. et al.

      Fecha de publicación:

      6
      2023
      Número de citas
      0

    Charlas relacionadas

    No se han encontrado charlas relacionadas.

    Congresos relacionados

    No se han encontrado congresos relacionados.