Física de Nebulosas Ionizadas

    General
    Descripción

    Este proyecto mantiene dos líneas principales de investigación activas:

    1) Estudio de la estructura, condiciones físicas y composición química de las nebulosas ionizadas, tanto galácticas como extragalácticas, a través del análisis detallado y modelización de sus espectros. Investigación de los gradientes de composición química a lo largo del disco de nuestra galaxia y en galaxias cercanas.

    2) Determinar las condiciones físico-químicas de las nebulosas planetarias galácticas con geometría bipolar y de las nebulosas alrededor de estrellas simbióticas. El fin es entender el origen de la bipolaridad y poner a prueba los modelos teóricos que intentan explicar la morfología y la cinemática nebular, con especial énfasis en los modelos con estrellas binarias centrales. Estudiaremos también las implicaciones de la evolución de los sistemas binarios en otros escenarios astrofísicos, como la formación de jets, las variables cataclismicas y las explosiones de tipo nova y supernova

    Investigador principal
    Gestor del proyecto
    Personal del proyecto
    Colaboradores
    Dr.
    A.R. López Sánchez
    Dr.
    N.C. Sterling
    Dra.
    Karla Z. Arellano Córdoba
    Dr.
    T. Hillwig
    Dr.
    M. Santander García
    Prof.
    B. Balick
    Dr.
    D. R. Gonçalves
    Dra.
    K. Kwitter
    Dr.
    A. Prsa
    1. Usando espectros en el rango infrarojo cercano obtenidos con EMIR/GTC, se han detectado por primera vez líneas de emisión de telurio y bromo en dos nebulosas planetarias. Estas son detecciones de elementos pesados en uno de los lugares en dónde se forman, nos dan información sobre el patrón de abundancias de elementos pesados debido al proceso-r y al proceso-s.

    Publicaciones relacionadas

    • Atomic Data Assessment with PyNeb: Radiative and Electron Impact Excitation Rates for [Fe ii] and [Fe iii]

      We use the PyNeb 1.1.16 Python package to evaluate the atomic datasets available for the spectral modeling of [Fe ii] and [Fe iii], which list level energies, A-values, and effective collision strengths. Most datasets are reconstructed from the sources, and new ones are incorporated to be compared with observed and measured benchmarks. For [Fe iii]

      Mendoza, Claudio et al.

      Fecha de publicación:

      4
      2023
      Número de citas
      3
    • An eclipsing 47 min double white dwarf binary at 400 pc

      We present the discovery of the eclipsing double white dwarf (WD) binary WDJ 022558.21-692025.38 that has an orbital period of 47.19 min. Following identification with the Transiting Exoplanet Survey Satellite, we obtained time series ground based spectroscopy and high-speed multiband ULTRACAM photometry which indicate a primary DA WD of mass $0.40

      Munday, James et al.

      Fecha de publicación:

      10
      2023
      Número de citas
      0
    • PM 1-322: New variable planetary nebula

      Context. Spectra of planetary nebulae (PNe) are characterised by strong forbidden emission lines and often also by an infrared (IR) excess. A few PNe show dust obscuration events and/or harbour long-period binaries. Some post-asymptotic giant branch stars, symbiotic stars, or B[e] stars may feature similar characteristics. Recently, dust clouds

      Paunzen, E. et al.

      Fecha de publicación:

      8
      2023
      Número de citas
      1
    • Everything that glitters is not gold: V1315 Cas is not a dormant black hole

      The quest for quiet or dormant black holes has been ongoing since several decades. Ellipsoidal variables possibly indicate the existence of a very high-mass invisible companion and are thought to be one of the best ways to find such dormant black holes. This, however, is not a panacea as we show here with one example. We indeed report the discovery

      Zak, J. et al.

      Fecha de publicación:

      10
      2023
      Número de citas
      1
    • Panning for gold, but finding helium: Discovery of the ultra-stripped supernova SN 2019wxt from gravitational-wave follow-up observations

      We present the results from multi-wavelength observations of a transient discovered during an intensive follow-up campaign of S191213g, a gravitational wave (GW) event reported by the LIGO-Virgo Collaboration as a possible binary neutron star merger in a low latency search. This search yielded SN 2019wxt, a young transient in a galaxy whose sky

      Agudo, I. et al.

      Fecha de publicación:

      7
      2023
      Número de citas
      4
    • The computation of interstellar extinction in photoionized nebulae

      Context. The proper plasma analysis practice (PPAP) method has been proposed to analyze spectroscopic data of ionized nebulae. The method is based on a coherent and simultaneous determination of the reddening correction and physical conditions in nebulae. The PPAP method's creators reanalyzed the results of nine of the brightest planetary nebulae

      Morisset, Christophe et al.

      Fecha de publicación:

      6
      2023
      Número de citas
      1
    • Temperature inhomogeneities cause the abundance discrepancy in H II regions

      H II regions are ionized nebulae surrounding massive stars. They exhibit a wealth of emission lines that form the basis for estimation of chemical composition. Heavy elements regulate the cooling of interstellar gas, and are essential to the understanding of several phenomena such as nucleosynthesis, star formation and chemical evolution1,2. For

      Méndez-Delgado, J. Eduardo et al.

      Fecha de publicación:

      6
      2023
      Número de citas
      10
    • Density biases and temperature relations for DESIRED H II regions

      We present a first study based on the analysis of the DEep Spectra of Ionized REgions Data base (DESIRED). This is a compilation of 190 high signal-to-noise ratio optical spectra of $\mathrm{H\, \scriptstyle II}$ regions and other photoionized nebulae, mostly observed with 8-10 m telescopes and containing ~29 380 emission lines. We find that the

      Méndez-Delgado, J. E. et al.

      Fecha de publicación:

      8
      2023
      Número de citas
      7
    • Volumetric Rates of Luminous Red Novae and Intermediate-luminosity Red Transients with the Zwicky Transient Facility

      Luminous red novae (LRNe) are transients characterized by low luminosities and expansion velocities, and they are associated with mergers or common-envelope ejections in stellar binaries. Intermediate-luminosity red transients (ILRTs) are an observationally similar class with unknown origins, but they are generally believed to be either electron

      Karambelkar, Viraj R. et al.

      Fecha de publicación:

      5
      2023
      Número de citas
      6
    • Analysis of integral field spectroscopy observations of the planetary nebula Hen 2-108 and its central star

      The study of planetary nebulae provides important constraints for many aspects of stellar and Galactic evolution. Hen 2-108 is a poorly known planetary nebula with a slight elliptical morphology and a peculiar central star (CS), which has defied classification. In this work, we present the first detailed integral field spectroscopic study of the

      Miranda Marques, Bárbara L. et al.

      Fecha de publicación:

      6
      2023
      Número de citas
      1
    • Planetary nebulae hosting accreting white dwarfs: a possible solution for the mysterious cut-off of planetary nebula luminosity function?

      Many binary companions to the central stars of planetary nebulae (PNe) are found to be inflated, perhaps indicating that accretion onto the central star might occur during the planetary nebula (PN) phase. The discovery of a handful of nova eruptions and supersoft X-ray sources inside PNe supports this hypothesis. In this paper, we investigate the

      Souropanis, D. et al.

      Fecha de publicación:

      5
      2023
      Número de citas
      2
    • The messy death of a multiple star system and the resulting planetary nebula as observed by JWST

      Planetary nebulae—the ejected envelopes of red giant stars—provide us with a history of the last, mass-losing phases of 90% of stars initially more massive than the Sun. Here we analyse images of the planetary nebula NGC 3132 from the James Webb Space Telescope (JWST) Early Release Observations. A structured, extended hydrogen halo surrounding an

      De Marco, Orsola et al.

      Fecha de publicación:

      12
      2022
      Número de citas
      10
    • The homogeneity of chemical abundances in H II regions of the Magellanic Clouds

      We use very deep spectra obtained with the Ultraviolet-Visual Echelle Spectrograph at the Very Large Telescope to derive physical conditions and chemical abundances of four H II regions of the Large Magellanic Cloud (LMC) and four H II regions of the Small Magellanic Cloud (SMC). The observations cover the spectral range 3100-10400 Å with a

      Domínguez-Guzmán, G. et al.

      Fecha de publicación:

      12
      2022
      Número de citas
      5
    • Searching for the next Galactic Luminous red nova

      Luminous red novae (LRNe) are astrophysical transients believed to be caused by the partial ejection of a binary star's common envelope (CE) and the merger of its components. The formation of the CE is likely to occur during unstable mass transfer, initiated by a primary star which is evolving off the main sequence (a Hertzsprung gap star) and a

      Addison, Harry et al.

      Fecha de publicación:

      12
      2022
      Número de citas
      1
    • Hubble constant and nuclear equation of state from kilonova spectro-photometric light curves

      The merger of two compact objects of which at least one is a neutron star is signalled by transient electromagnetic emission in a kilonova (KN). This event is accompanied by gravitational waves and possibly other radiation messengers such as neutrinos or cosmic rays. The electromagnetic emission arises from the radioactive decay of heavy r-process

      Pérez-García, M. A. et al.

      Fecha de publicación:

      10
      2022
      Número de citas
      6
    • A detailed study of the barium central star of the planetary nebula Abell 70

      We present a detailed study of the barium star at the heart of the planetary nebula Abell 70. Time-series photometry obtained over a period of more than 10 yr demonstrates that the barium-contaminated companion is a rapid rotator with temporal variability due to spots. The amplitude and phasing of the photometric variability change abruptly

      Jones, David et al.

      Fecha de publicación:

      11
      2022
      Número de citas
      0
    • MUSSES2020J: The Earliest Discovery of a Fast Blue Ultraluminous Transient at Redshift 1.063

      In this Letter, we report the discovery of an ultraluminous fast-evolving transient in rest-frame UV wavelengths, MUSSES2020J, soon after its occurrence by using the Hyper Suprime-Cam (HSC) mounted on the 8.2 m Subaru telescope. The rise time of about 5 days with an extremely high UV peak luminosity shares similarities to a handful of fast blue

      Jiang, Ji-an et al.

      Fecha de publicación:

      7
      2022
      Número de citas
      7
    • Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy - III. HH 514

      We analyse the physical conditions and chemical composition of the photoionized Herbig-Haro object HH 514, which emerges from the protoplanetary disc (proplyd) 170-337 in the core of the Orion Nebula. We use high-spectral resolution spectroscopy from Ultraviolet and Visual Echelle Spectrograph at the Very Large Telescope and IFU-spectra from MEGARA

      Méndez-Delgado, J. E. et al.

      Fecha de publicación:

      7
      2022
      Número de citas
      6
    • About Metallicity Variations in the Local Galactic Interstellar Medium

      In this paper we discuss and confront recent results on metallicity variations in the local interstellar medium, obtained from observations of H II regions and neutral clouds of the Galactic thin disk, and compare them with recent high-quality metallicity determinations of other tracers of the chemical composition of the interstellar medium as B

      Esteban, C. et al.

      Fecha de publicación:

      6
      2022
      Número de citas
      16
    • Spectroscopic analysis tool for intEgraL fieLd unIt daTacubEs (SATELLITE): case studies of NGC 7009 and NGC 6778 with MUSE

      Integral field spectroscopy (IFS) provides a unique capability to spectroscopically study extended sources over a 2D field of view, but it also requires new techniques and tools. In this paper, we present an automatic code, Spectroscopic Analysis Tool for intEgraL fieLd unIt daTacubEs, SATELLITE, designed to fully explore such capability in the

      Akras, S. et al.

      Fecha de publicación:

      5
      2022
      Número de citas
      9

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