Study the relation between photosynthetic systems in exoplanets of stars of different spectral types from an astrobiological and multidisciplinar point of view.
| Principal Investigators | Felipe Gómez and José Antonio Caballero |
| WG0. Project Manager | Pablo Marcos-Arenal |
| WG1. Photo-Systems Coordinator | Juan García de la Concepción |
| WG2. Stars Coordinator | Nuria Fonseca-Bonilla |
| WG3. Planetary Atmospheres Coordinator | María-Ángeles López-Cayuela |
| WG4. Spectral-Overlap Coordinator | Luis Cerdán |
| WG5. Instrumentation Coordinator | Mercedes Burillo Villalobos |
This project was born from the Academia María de Maeztu at the Centro de Astrobiología Challenge entitled Remote search and characterization of exoplanets, including atmospheric studies.
The following image shows a diagram of the inputs, outputs and notebooks involved in the data processing required to obtain the scientific results and conclusions of this project.
The Spectral Overlap Files (SOF) calculation notebook (/notebooks/SOF_calculation) generates the resulting spectral and total absorption rates (SAR & TAR) in for each of the considered input pigment/stars/planetary atmosphere. The spectral absorption rate (SAR) is saved to spectral overlap files (SOF), while the total absorption rate (TAR,
The SOF_calculation notebooks uses the spectral_overlap_functions library (imported as sof) located on exophot/codes/spectral_overlap_functions.py
These calculations are already performed, so the SOF files are included in the /output/SOF/ folder and the notebooks providing the analysis and results figures and tables can be executed directly. If new pigments/stars/planetary atmospheres parameters are included, the SOF_calculation notebook needs to be executed as in the instructions indicated on it.
- spectral_overlap_functions library (imported as sof) located on
exophot/codes/spectral_overlap_functions.py - Pigment: files with extinction coefficient spectrum located at
exophot/input/pigments/ - Atmospheres: files with atmosphere transmittance spectrum located at
exophot/input/atmosphere/ - SEDs: files with spectral flux density spectrum located at
exophot/input/stellar/ - exosys_params.csv: auxiliary file containing solar radii (Rs) and habitable zone (HZ) boundaries (inner, mid, outer) for different solar spectral types located at
exophot/input/exosys_params.csv
- Spectral Overlap Files (SOF) under
exophot/output/SOFcontaining:- Date
- SED file
- atmosphere file
- photopigment file
- Stellar radius (Rs in km)
- Exoplanet orbit semi-major axis (sma in km)
- Total absorption rate (gamma_t in s-1)
- B band absorption rate (gamma_B in s-1)
- Q band absorption rate (gamma_Q in s-1)
- B-Q bands cut-off (in nm)
- photosynthetic photon flux density (ppfd in micromol photon m-2 s-1)
- Total Stellar Irradiance (S in W m-2):
- Col 1: Wavelength (wl in Angstrom)
- Col 2: Spectral Flux Density (F_l in J cm-2 s-1 A-1)
- Col 3: Atmosphere transmitance (T, no units)
- Col 4: Pigment absorption cross section (sigma_abs in cm^2)
- Col 5: Spectral Absorption Rate (Gamma_lambda in A-1 s-1)
- tar_table_df: pandas dataframe with Total Absorption Rate (TAR,
$\gamma$ ) containing resulting absortion rates ($\gamma$ ), photosynthetic photon flux density (ppfd) and stellar irradiance (S) for a combination of stars, atmospheres and pigments.-
$\gamma_t$ : total absorption rate [s-1] -
$\gamma_B$ : absorption rate at B band [s-1] -
$\gamma_Q$ : absorption rate at Q band [s-1] - ppfd: photosynthetic photon flux density [micromol photon m-2 s-1]
- S: Total Stellar Irradiance (in W m-2)
-
If your research benefits from the use this work, we would appreciate if you could include the following reference/s in your publication:
P. Marcos-Arenal, et al., Exophot. a new metric for quantifying the exoplanetary photosynthetic activity fitness. (2022)
J. García de la Concepción, et al., Exophot. phot0, a plausible primeval pigment on earth and rocky exoplanets. (2022).The code in this repository, including all notebooks, is released under the MIT license. Read more at the Open Source Initiative.