Exoplanetas y Astrobiología

    General
    Descripción

    La búsqueda de vida en el Universo se ha visto impulsada por los recientes descubrimientos de planetas alrededor de otras estrellas (los llamados exoplanetas), convirtiéndose en uno de los campos más activos dentro de la Astrofísica moderna. En los últimos años los descubrimientos cada vez más numerosos de nuevos exoplanetas y los últimos avances en el estudio de sus atmósferas no sólo están dándonos valiosa nueva información sobre sus propiedades físicas, sino que nos están permitiendo además poner las propiedades de los planetas de nuestro Sistema Solar dentro un contexto más global. El campo esta acercándose al importante descubrimiento de los primeros planetas potencialmente habitables, impulsando estudios más detallados de estos planetas. Con el lanzamiento de las nuevas misiones como JWST, CHEOPS, TESS, ARIEL o PLATO, al campo de exoplanetas se le plantea un futuro muy excitante.

    Es por esta razon que este campo se ayuda de y, a su vez motiva, el desarrollo de instrumentación cada vez más sensible y estable tanto para telescopios de tierra como para las misiones espaciales. Dos frentes para los que nuestro grupo esta especialmente preparado. Por un lado, durante los ultimos años hemos desarrollado tecnicas de observacion y reduccion de transitos de exoplanetas para los telescopios del ORM, siendo el nuestro uno de los grupos mas productivos en la explotacion de GTC. Por otro lado, todas las misiones espaciales ESA (presentes y futuras) relacionadas con exoplanetas cuentan con uno o varios de los componentes del proyecto como CoIs.

    En el marco de este proyecto, pretendemos que los investigadores del IAC mantengan una situación aventajada con la explotación de OSIRIS y EMIR, instrumentos de primera luz de GTC, y participen en la construcción, comisionado y operación de nuevos instrumentos, como el espectrografo óptico de alta resolución HORUS en el GTC. La explotacion de la fotometria y espectroscopia de transitos con LIRIS en el WHT es tambien uno de nuestros principales intereses, especialmente en preparacion de la instalacion en 2015 del instrumento EMIR en el GTC.

    En resumen, el proyecto "Exoplanetas y Astrobiologia" se centrará entorno a estas cuatro lineas principales de actuacion:

    1) Caracterización de las propiedades fisicas y atmosfericas de exoplanetas (GTC, WHT, HARPSN, CARMENES, ESPRESSO, ARIEL etc.)

    2) Búsquedas y confirmacion de exoplanetas por transitos (CoRoT, Kepler, K2, CHEOPS, XO, LCOGT, WFC, PLATO, etc.)

    3) Busquedas/ confirmacion de exoplanetas por velocidad radial (HARPSN, HORUS, LCOGT, SONG, CARMENES)

    4) Astrobiología

    Investigador principal
    Personal del proyecto
    1. Deteccion de He en la atmosfera de un exoplaneta por primera vez, publicado en Science.
    2. Deteccion de un planeta entorno a la estrella de Barnard, publicado en Nature
    3. Deteccion de los primeros planetas del la mision TESS, con varios articulos de impacto
    4. Descubrimiento de rasgos de Na y Halpha en el espectro de KELT-20b con el TNG
    5. Publicación del Handbook of Exoplanets, la obra de referencia más extenso en el campo de los exoplanetas. Este Manual fue editado por miembros de nuestro grupo e incluye contribuciones de unos 300 expertos en todo el mundo, incluidos 12 miembros de IAC.

    Publicaciones relacionadas

    • A nearby transiting rocky exoplanet that is suitable for atmospheric investigation
      Spectroscopy of transiting exoplanets can be used to investigate their atmospheric properties and habitability. Combining radial velocity (RV) and transit data provides additional information on exoplanet physical properties. We detect a transiting rocky planet with an orbital period of 1.467 days around the nearby red dwarf star Gliese 486. The
      Trifonov, T. et al.

      Fecha de publicación:

      3
      2021
      Número de citas
      53
    • TIC 168789840: A Sextuply Eclipsing Sextuple Star System
      We report the discovery of a sextuply eclipsing sextuple star system from TESS data, TIC 168789840, also known as TYC 7037-89-1, the first known sextuple system consisting of three eclipsing binaries. The target was observed in Sectors 4 and 5 during Cycle 1, with lightcurves extracted from TESS Full Frame Image data. It was also previously
      Powell, Brian P. et al.

      Fecha de publicación:

      4
      2021
      Número de citas
      34
    • The atmosphere of HD 209458b seen with ESPRESSO. No detectable planetary absorptions at high resolution
      We observed two transits of the iconic gas giant HD 209458b between 380 and 780 nm, using the high-resolution ESPRESSO spectrograph. The derived planetary transmission spectrum exhibits features at all wavelengths where the parent star shows strong absorption lines, for example, Na I, Mg I, Fe I, Fe II, Ca I, V I, Hα, and K I. We interpreted these
      Casasayas-Barris, N. et al.

      Fecha de publicación:

      3
      2021
      Número de citas
      49
    • CHEOPS observations of the HD 108236 planetary system: a fifth planet, improved ephemerides, and planetary radii
      Context. The detection of a super-Earth and three mini-Neptunes transiting the bright (V = 9.2 mag) star HD 108236 (also known as TOI-1233) was recently reported on the basis of TESS and ground-based light curves. Aims: We perform a first characterisation of the HD 108236 planetary system through high-precision CHEOPS photometry and improve the
      Bonfanti, A. et al.

      Fecha de publicación:

      2
      2021
      Número de citas
      61
    • A Multiwavelength Look at the GJ 9827 System: No Evidence of Extended Atmospheres in GJ 9827b and d from HST and CARMENES Data
      GJ 9827 is a bright star hosting a planetary system with three transiting planets. As a multiplanet system with planets that sprawl within the boundaries of the radius gap between terrestrial and gaseous planets, GJ 9827 is an optimal target to study the evolution of the atmospheres of close-in planets with a common evolutionary history and their
      Carleo, Ilaria et al.

      Fecha de publicación:

      3
      2021
      Número de citas
      23
    • ESPRESSO high-resolution transmission spectroscopy of WASP-76 b
      Aims: We report on ESPRESSO high-resolution transmission spectroscopic observations of two primary transits of the highly irradiated, ultra-hot Jupiter-sized planet, WASP-76b. We investigated the presence of several key atomic and molecular features of interest that may reveal the atmospheric properties of the planet. Methods: We extracted two
      Tabernero, H. M. et al.

      Fecha de publicación:

      2
      2021
      Número de citas
      82
    • Improving light curve parameters of exoplanets based on TESS data
      We revise parameters of four transiting hot Jupiter planets discovered by ground-based surveys. We use follow-up observations carried by TESS mission together with PyTransit software. Space telescopes like TESS provide better coverage and photometry precision than ground-based telescopes. PyTransit is fast and user-friendly exoplanet transit light
      Gajdoš, P. et al.

      Fecha de publicación:

      1
      2021
      Número de citas
      1
    • The CHEOPS mission
      The CHaracterising ExOPlanet Satellite (CHEOPS) was selected on October 19, 2012, as the first small mission (S-mission) in the ESA Science Programme and successfully launched on December 18, 2019, as a secondary passenger on a Soyuz-Fregat rocket from Kourou, French Guiana. CHEOPS is a partnership between ESA and Switzerland with important
      Benz, W. et al.

      Fecha de publicación:

      2
      2021
      Número de citas
      183
    • Planet cartography with neural learned regularization
      Aims: Finding potential life harboring exo-Earths with future telescopes is one of the aims of exoplanetary science. Detecting signatures of life in exoplanets will likely first be accomplished by determining the bulk composition of the planetary atmosphere via reflected or transmitted spectroscopy. However, a complete understanding of the
      Asensio Ramos, A. et al.

      Fecha de publicación:

      2
      2021
      Número de citas
      6
    • Identification and Mitigation of a Vibrational Telescope Systematic with Application to Spitzer
      We observed Proxima Centauri with the Spitzer Space Telescope Infrared Array Camera five times in 2016 and 2017 to search for transits of Proxima Centauri b. Following standard analysis procedures, we found three asymmetric, transit-like events that are now understood to be vibrational systematics. This systematic is correlated with the width of
      Challener, Ryan C. et al.

      Fecha de publicación:

      2
      2021
      Número de citas
      6
    • Extrasolar Enigmas: From Disintegrating Exoplanets to Exoasteroids
      Thousands of transiting exoplanets have been discovered to date, thanks in great part to the Kepler space mission. As in all populations, and certainly in the case of exoplanets, one finds unique objects with distinct characteristics. Here we will describe the properties and behaviour of a small group of 'disintegrating' exoplanets discovered over
      Budaj, Jan et al.

      Fecha de publicación:

      6
      2020
      Número de citas
      2
    • An ultrahot Neptune in the Neptune desert
      About 1 out of 200 Sun-like stars has a planet with an orbital period shorter than one day: an ultrashort-period planet 1,2. All of the previously known ultrashort-period planets are either hot Jupiters, with sizes above 10 Earth radii (R ⊕), or apparently rocky planets smaller than 2 R ⊕. Such lack of planets of intermediate size (the `hot Neptune
      Jenkins, James S. et al.

      Fecha de publicación:

      0
      2020
      Número de citas
      53
    • Processing GOTO data with the Rubin Observatory LSST Science Pipelines I: Production of coadded frames
      The past few decades have seen the burgeoning of wide-field, high-cadence surveys, the most formidable of which will be the Legacy Survey of Space and Time (LSST) to be conducted by the Vera C. Rubin Observatory. So new is the field of systematic time-domain survey astronomy; however, that major scientific insights will continue to be obtained
      Mullaney, J. R. et al.

      Fecha de publicación:

      1
      2021
      Número de citas
      3
    • Planet Hunters TESS II: findings from the first two years of TESS
      We present the results from the first two years of the Planet Hunters TESS (PHT) citizen science project, which identifies planet candidates in the TESS (Transiting Exoplanet Survey Satellite) data by engaging members of the general public. Over 22 000 citizen scientists from around the world visually inspected the first 26 sectors of TESS data in
      Eisner, N. L. et al.

      Fecha de publicación:

      3
      2021
      Número de citas
      37
    • ESPRESSO at VLT. On-sky performance and first results
      Context. ESPRESSO is the new high-resolution spectrograph of ESO's Very Large Telescope (VLT). It was designed for ultra-high radial-velocity (RV) precision and extreme spectral fidelity with the aim of performing exoplanet research and fundamental astrophysical experiments with unprecedented precision and accuracy. It is able to observe with any
      Pepe, F. et al.

      Fecha de publicación:

      1
      2021
      Número de citas
      309
    • The TESS-Keck Survey. II. An Ultra-short-period Rocky Planet and Its Siblings Transiting the Galactic Thick-disk Star TOI-561
      We report the discovery of TOI-561, a multiplanet system in the galactic thick disk that contains a rocky, ultra-short-period planet. This bright (V = 10.2) star hosts three small transiting planets identified in photometry from the NASA TESS mission: TOI-561 b (TOI-561.02, P = 0.44 days, R p = 1.45 ± 0.11 R ⊕), c (TOI-561.01, P = 10.8 days, R p =
      Weiss, Lauren M. et al.

      Fecha de publicación:

      2
      2021
      Número de citas
      35
    • A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
      We report the discovery and characterization of two transiting planets around the bright M1 V star LP 961-53 (TOI-776, J = 8.5 mag, M = 0.54 ± 0.03 M ☉) detected during Sector 10 observations of the Transiting Exoplanet Survey Satellite (TESS). Combining the TESS photometry with HARPS radial velocities, as well as ground-based follow-up transit
      Luque, R. et al.

      Fecha de publicación:

      1
      2021
      Número de citas
      39
    • A Modified Kwee─Van Woerden Method for Eclipse Minimum Timing with Reliable Error Estimates
      The Kwee - van Woerden (KvW) method for the determination of eclipse minimum times has been a staple in eclipsing binary research for decades, due its simplicity and independence of external input parameters, which makes it also well suited to obtain timings of exoplanet transits. However, its estimates of the timing error have been known to be of
      Deeg, H. J.

      Fecha de publicación:

      12
      2020
      Número de citas
      3
    • Strong Hα emission in the young planetary mass companion 2MASS J0249-0557 c
      Aims: Our objective is the optical and near-infrared spectroscopic characterisation of 2MASS J0249-0557 c, a recently discovered young planetary mass companion to the β Pictoris (~25 Myr) member 2MASS J0249-0557. Methods: Using the Visible and Infrared Survey Telescope for Astronomy Hemisphere Survey and the Two Micron All Sky Survey (2MASS) data
      Chinchilla, P. et al.

      Fecha de publicación:

      1
      2021
      Número de citas
      6
    • Ultracool dwarfs in deep extragalactic surveys using the virtual observatory: ALHAMBRA and COSMOS
      Ultracool dwarfs (UCDs) encompass a wide variety of compact stellar-like objects with spectra classified as late-M, L, T, and Y. Most of them have been discovered using wide-field imaging surveys. The Virtual Observatory (VO) has proven to be of great utility to efficiently exploit these astronomical resources. We aim to validate a VO methodology
      Solano, E. et al.

      Fecha de publicación:

      1
      2021
      Número de citas
      11

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