Cigale astrophysics

  • What are the basics of astrophysics and astronomy?

    Astrophysics creates physical theories of small to medium-size objects and structures in the universe.
    Astronomy measures the positions, luminosities, motions and other characteristics of celestial objects.
    Cosmology covers the cosmos' largest structures and the universe as a whole..

  • What is the Cigale sed code?

    The CIGALE code has been developed to study the evolution of galaxies by comparing modelled galaxy spectral energy distributions (SEDs) to observed ones from the far ultraviolet to the far infrared.
    It extends the SED fitting algorithm written by Burgarella et al..

  • B Spectral Energy Distributions.
    The observed integrated spectra of normal galaxies are functions of stellar population, star formation rate, mean metal content, gas content, and dust content.
    These properties correlate with, and in some cases are causually related to, galaxy morphology.
  • The CIGALE code has been developed to study the evolution of galaxies by comparing modelled galaxy spectral energy distributions (SEDs) to observed ones from the far ultraviolet to the far infrared.
    It extends the SED fitting algorithm written by Burgarella et al.
Context.
Measuring how the physical properties of galaxies change across cosmic times is essential to understand galaxy formation and evolution.,CIGALE means Code Investigating GALaxy Emission.
The code has been developed to study the evolution of galaxies by comparing modelled galaxy spectral energy distributions (SEDs) to observed ones from the X-rays and far ultraviolet to the far infra-red and radio.,CIGALE means Code Investigating GALaxy Emission.
The code has been developed to study the evolution of galaxies by comparing modelled galaxy spectral energy  Cigale / CIGALEGitLabCIGALE releasesDownloadFAQ,Methods.
With the code CIGALE and different values for nine input parameters characterising the stellar population, we simulated a sample of 11 475 optical  ,The primary purposes of CIGALE are to generate theoretical models and, optionally, to use them to estimate the physical properties of galaxies.
As the latter  ,To compute the spectral models, CIGALE builds composite stellar populations from simple stellar populations combined with highly flexible star formation histories, calculates the emission from gas ionised by massive stars, and attenuates both the stars and the ionised gas with a highly flexible attenuation curve.,To compute the spectral models, CIGALE builds composite stellar populations from simple stellar populations combined with highly flexible star formation 

Can Cigale fit X-ray data?

CIGALE is a powerful multiwavelength spectral energy distribution (SED) fitting code for extragalactic studies

However, the current version of CIGALE is not able to fit X-ray data, which often provide unique insights into AGN intrinsic power

We develop a new X-ray module for CIGALE, allowing it to fit SEDs from the X-ray to infrared (IR)

What does Cigale stand for?

The Code Investigating GALaxy Emission (CIGALE) is an efficient PYTHON code for spectral energy distribution (SED) fitting of galaxies and active galactic nuclei (AGNs)

Recently, a major extension of CIGALE (named X-CIGALE) has been developed to account for AGN/galaxy X-ray emission and improve AGN modeling at UV-to-IR wavelengths

What is Cigale in Python?

We present a completely new implementation of CIGALE

Written in python, its main aims are to easily and efficiently model the FUV to radio spectrum of galaxies and estimate their physical properties such as :,star formation rate, attenuation, dust luminosity, stellar mass, and many other physical quantities

Methods

What is X-Cigale?

Recently, a major extension of CIGALE (named X-CIGALE) has been developed to account for AGN/galaxy X-ray emission and improve AGN modeling at UV-to-IR wavelengths

Here, we apply X-CIGALE to different samples, including :,COSMOS spectroscopic type 2 AGNs, CDF-S X-ray detected normal galaxies, SDSS quasars, and COSMOS radio objects

What analysis modules are available with Cigale?

Two analysis modules are available with CIGALE: savefluxes to generate a grid of models and save the outputs (fluxes, SFH, physical properties, etc

) and pdf_analysis that not only generates a grid of models but also fits these models to observations to estimate various physical properties and save the outputs

,4,1

Computing physical quantities

What does Cigale stand for?

CIGALE means Code Investigating GALaxy Emission

The code has been developed to study the evolution of galaxies by comparing modelled galaxy spectral energy distributions (SEDs) to observed ones from the X-rays and far ultraviolet to the far infra-red and radio

See the Download page to download CIGALE

The git repository is on our Gitlab

What is Cigale in Python?

We present a completely new implementation of CIGALE

Written in python, its main aims are to easily and efficiently model the FUV to radio spectrum of galaxies and estimate their physical properties such as star formation rate, attenuation, dust luminosity, stellar mass, and many other physical quantities

,Methods
CIGALE means Code Investigating GALaxy Emission. The code has been developed to study the evolution of galaxies by comparing modelled galaxy spectral energy distributions (SEDs) to observed ones from the X-rays and far ultraviolet to the far infra-red and radio. See the Download page to download CIGALE.Code Investigating GALaxy Emission (CIGALE) is a powerful multiwavelength spectral energy distribution (SED) fitting code for extragalactic studies. However, the current version of CIGALE is not able to fit X-ray data, which often provide unique insights into active galactic nucleus (AGN) intrinsic power.

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