Año de inicio
2013
Unidad organizativa
Institución organizadora
Subvenciones relacionadas:
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
Miembros
Investigador principal
Enric
Pallé Bago
Personal del proyecto
Hans Jörg
Deeg Deeg
Nicolas Cédric
Lodieu
Javier Andrés
Licandro Goldaracena
Víctor Javier
Sánchez Bejar
Juan Antonio
Belmonte Avilés
Roi
Alonso Sobrino
Grzegorz
Nowak
Patricia
Chinchilla Gallego
A. L. Cabrera Lavers
Felipe Andrés
Murgas Alcaino
Hannu
Parviainen
Colaboradores
Dr.
Paulo Miles Paez
Dr.
Maria Rosa Zapatero Osorio
Dr.
M. Mas Hesse
Dr.
M. Deleuil
Dr.
D. Gandolfi
Dr.
M. Fridlund
Dr.
L. Doyle
Dr.
H. Rauer
Dr.
J. Cabrera
Dr.
Sz. Csizmadia
Dr.
D. Pollacco
Dr.
A. Hatzes
Dr.
T. Mazeh
Dr.
T. Boyajian
Dr.
B. Tingley
Dr.
D. Martin
Dr.
A Triaud
Dr.
D. Fabrycky
Antonio Cabrera Lavers
Resultados
- Deteccion de He en la atmosfera de un exoplaneta por primera vez, publicado en Science.
- Deteccion de un planeta entorno a la estrella de Barnard, publicado en Nature
- Deteccion de los primeros planetas del la mision TESS, con varios articulos de impacto
- Descubrimiento de rasgos de Na y Halpha en el espectro de KELT-20b con el TNG
- 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.
Actividad científica
Publicaciones relacionadas
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A 5M<SUB>Jup</SUB> non-transiting coplanar circumbinary planet around Kepler-1660ABOver a dozen transiting circumbinary planets have been discovered around eclipsing binaries. Transit detections are biased towards aligned planet and binary orbits, and indeed all of the known planets have mutual inclinations less than 4.5 ○. One path to discovering circumbinary planets with misaligned orbits is through eclipse timing variationsGoldberg, Max et al.
Fecha de publicación:
112023 -
Investigating the visible phase-curve variability of 55 Cnc e★Context. 55 Cnc e is an ultra-short period super-Earth transiting a Sun-like star. Previous observations in the optical range detected a time-variable flux modulation that is phased with the planetary orbital period, whose amplitude is too large to be explained by reflected light and thermal emission alone. Aims: The goal of the study is toMeier Valdés, E. A. et al.
Fecha de publicación:
92023 -
Company for the Ultra-high Density, Ultra-short Period Sub-Earth GJ 367 b: Discovery of Two Additional Low-mass Planets at 11.5 and 34 DaysGJ 367 is a bright (V ≈ 10.2) M1 V star that has been recently found to host a transiting ultra-short period sub-Earth on a 7.7 hr orbit. With the aim of improving the planetary mass and radius and unveiling the inner architecture of the system, we performed an intensive radial velocity follow-up campaign with the HARPS spectrograph-collecting 371Goffo, Elisa et al.
Fecha de publicación:
92023 -
Confirmation of an He I evaporating atmosphere around the 650-Myr-old sub-Neptune HD 235088 b (TOI-1430 b) with CARMENESHD 235088 (TOI-1430) is a young star known to host a sub-Neptune-sized planet candidate. We validated the planetary nature of HD 235088 b with multiband photometry, refined its planetary parameters, and obtained a new age estimate of the host star, placing it at 600-800 Myr. Previous spectroscopic observations of a single transit detected an excessOrell-Miquel, J. et al.
Fecha de publicación:
92023 -
TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf starsWe present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084 b, and TOI-4184b. We characterized the host stars by combining spectra from Shane/Kast and Magellan/FIRE, spectral energy distribution analysis, and stellar evolutionary models. In addition, we used Gemini-South/Zorro & -North/Alopeke high-resolutionBarkaoui, K. et al.
Fecha de publicación:
92023 -
TOI-1416: A system with a super-Earth planet with a 1.07 d periodTOI-1416 (BD+42 2504, HIP 70705) is a V =10 late G- or early K-type dwarf star. TESS detected transits in its Sectors 16, 23, and 50 with a depth of about 455 ppm and a period of 1.07 days. Radial velocities (RVs) confirm the presence of the transiting planet TOI-1416 b, which has a mass of 3.48 ± 0.47 M ⊕ and a radius of 1.62 ± 0.08 R ⊕, implyingDeeg, H. J. et al.
Fecha de publicación:
92023 -
Modeling the Chromosphere and Transition Region of Planet-hosting Star GJ 436Ahead of upcoming space missions intending to conduct observations of low-mass stars in the ultraviolet (UV) spectral region it becomes imperative to simultaneously conduct atmospheric modeling from the UV to the visible (VIS) and near-infrared (NIR). Investigations on extended spectral regions will help to improve the overall understanding of theHintz, Dominik et al.
Fecha de publicación:
92023 -
Long-term trends in albedo as seen from a lunar observatoryThe Earth's albedo is the fraction of short-wave solar radiation that is reflected back to space, and is key to understand the observed trends in climate change. Although there have been many observational approaches to estimate the Earth's albedo, different methods have their own drawbacks, for example, artificial satellites have a finite lifeWu, Jie et al.
Fecha de publicación:
92023 -
A broadband thermal emission spectrum of the ultra-hot Jupiter WASP-18bClose-in giant exoplanets with temperatures greater than 2,000 K (`ultra-hot Jupiters') have been the subject of extensive efforts to determine their atmospheric properties using thermal emission measurements from the Hubble Space Telescope (HST) and Spitzer Space Telescope 1-3. However, previous studies have yielded inconsistent results becauseCoulombe, Louis-Philippe et al.
Fecha de publicación:
82023 -
The mass of TOI-519 b: A close-in giant planet transiting a metal-rich mid-M dwarfWe report on the determination of the mass of TOI-519 b, a transiting substellar object around a mid-M dwarf. We carried out radial velocity measurements using Subaru/InfraRed Doppler (IRD), revealing that TOI-519 b is a planet with a mass of $0.463^{+0.082}_{-0.088}\, M_{\rm Jup}$. We also found that the host star is metal rich ([Fe/H] = 0.27 ± 0Kagetani, Taiki et al.
Fecha de publicación:
82023 -
An M dwarf accompanied by a close-in giant orbiter with SPECULOOSIn the last decade, a dozen close-in giant planets have been discovered orbiting stars with spectral types ranging from M0 to M4, a mystery since known formation pathways do not predict the existence of such systems. Here, we confirm TOI-4860 b, a Jupiter-sized planet orbiting an M4.5 host, a star at the transition between fully and partiallyTriaud, Amaury H. M. J. et al.
Fecha de publicación:
102023 -
TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an inner low-mass planetThe TOI-1130 is a known planetary system around a K-dwarf consisting of a gas giant planet, TOI-1130 c on an 8.4-day orbit that is accompanied by an inner Neptune-sized planet, TOI-1130 b, with an orbital period of 4.1 days. We collected precise radial velocity (RV) measurements of TOI-1130 with the HARPS and PFS spectrographs as part of ourKorth, J. et al.
Fecha de publicación:
72023 -
A Mini-Neptune Orbiting the Metal-poor K Dwarf BD+29 2654We report the discovery and Doppler mass measurement of a 7.4 days 2.3 R ⊕ mini-Neptune around a metal-poor K dwarf BD+29 2654 (TOI-2018). Based on a high-resolution Keck/HIRES spectrum, the Gaia parallax, and multiwavelength photometry from the UV to the mid-infrared, we found that the host star has ${T}_{\mathrm{eff}}={4174}_{-42}^{+34}$ K, $Dai, Fei et al.
Fecha de publicación:
82023 -
The planetary system around HD 190622 (TOI-1054). Measuring the gas content of low-mass planets orbiting F-starsContext. Giant planets are known to dominate the long-term stability of planetary systems due to their prevailing gravitational interactions, but they are also thought to play an important role in planet formation. Observational constraints improve our understanding of planetary formation processes such as the delivery of volatile-richCabrera, J. et al.
Fecha de publicación:
72023 -
Two sub-Neptunes around the M dwarf TOI-1470Aims: A transiting planet candidate with a sub-Neptune radius orbiting the nearby (d = 51.9 ± 0.07 pc) M1.5 V star TOI-1470 with a period of ~2.5 d was announced by the NASA Transiting Exoplanet Survey Satellite (TESS), which observed the field of TOI-1470 in four different sectors. We aim to validate its planetary nature using precise radialGonzález-Álvarez, E. et al.
Fecha de publicación:
72023 -
The CARMENES search for exoplanets around M dwarfs. A sub-Neptunian mass planet in the habitable zone of HN LibWe report the discovery of HN Lib b, a sub-Neptunian mass planet orbiting the nearby (d ≈ = 6.25 pc) M4.0 V star HN Lib detected by our CARMENES radial-velocity (RV) survey. We determined a planetary minimum mass of M b sin i = 5.46 ± 0.75 M ⊕ and an orbital period of P b = 36.116 ± 0.029 d, using ~5 yr of CARMENES data, as well as archival RVsGonzález-Álvarez, E. et al.
Fecha de publicación:
72023 -
Featureless transmission spectra of 12 giant exoplanets observed by GTC/OSIRISContext. Exoplanet atmospheres are the key to understanding the nature of exoplanets. To this end, transit spectrophotometry provides us opportunities to investigate the physical properties and chemical compositions of exoplanet atmospheres. Aims: We aim to detect potential atmospheric signatures in 12 gaseous giant exoplanets using transitJiang, C. et al.
Fecha de publicación:
72023 -
An unusually low-density super-Earth transiting the bright early-type M-dwarf GJ 1018 (TOI-244)Context. Small planets located at the lower mode of the bimodal radius distribution are generally assumed to be composed of iron and silicates in a proportion similar to that of the Earth. However, recent discoveries are revealing a new group of low-density planets that are inconsistent with that description. Aims: We intend to confirm andCastro-González, A. et al.
Fecha de publicación:
72023 -
GRB 201015A and the nature of low-luminosity soft gamma-ray burstsGRB 201015A is a peculiarly low luminosity, spectrally soft gamma-ray burst (GRB), with T 90 = 9.8 ± 3.5 s (time interval of detection of 90 per cent of photons from the GRB), and an associated supernova (likely to be type Ic or Ic-BL). GRB 201015A has an isotropic energy $E_{\gamma , \rm iso}$$= 1.75 ^{+0.60} _{-0.53} \times 10^{50}$ erg, andPatel, M. et al.
Fecha de publicación:
82023 -
Exploring the stellar surface phenomena of WASP-52 and HAT-P-30 with ESPRESSOWe analyse spectroscopic and photometric transits of the hot Jupiters WASP-52 b and HAT-P30 b obtained with ESPRESSO, Eulercam and NGTS for both targets, and additional TESS data for HAT-P-30. Our goal is to update the system parameters and refine our knowledge of the host star surfaces. For WASP-52, the companion planet has occulted starspots inCegla, H. M. et al.
Fecha de publicación:
62023
