Welcome to my minimal webpage !

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   My name is Johan Comparat, I am a researcher at MPE.
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   My scientific interests are physical cosmology and the large-scale structure of the Universe; galaxy formation and evolution, active galaxies, gravitational lensing, clusters of galaxies, and astronomical observations.
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My office at MPE is X5 1.2.3 and my phone number is +49 (0)89 30000-3593

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About me

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<ul>
	<li>
	<a href="cv/comparat_cv_english.pdf">Curriculum vitae</a>
	</li>
	
	<li>
	Publication lists from
	<a href="https://ui.adsabs.harvard.edu/search/q=author%3A%22Comparat%2C%20Johan%22&sort=date%20desc%2C%20bibcode%20desc">NASA/ADS</a>
	and compiled by myself <a href="cv/liste_publications_EN.pdf">in pdf</a>
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Latest articles and presentation
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<ul>
	<li>
	<a href="https://ui.adsabs.harvard.edu/abs/2023arXiv230101388C/abstract">The cosmic web of X-ray active galactic nuclei seen through the eROSITA Final Equatorial Depth Survey (eFEDS)</a> (<a href="https://www.youtube.com/watch?v=09UKgG1oYZs">talk on youtube</a>)
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	<li>
	<a href="https://ui.adsabs.harvard.edu/abs/2022arXiv220105169C/abstract">The eROSITA Final Equatorial Depth Survey (eFEDS): X-ray emission around star-forming and quiescent galaxies</a>
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	Recent <a href="https://cral.univ-lyon1.fr/IMG/mov/seminaires/230127_Comparat.mp4">recorded seminar</a> given in January 2023 at CRAL, Lyon, France
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X-ray simulated universes
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<ul>
        <li>
        <a href="https://ui.adsabs.harvard.edu/abs/2022A%26A...665A..78S/abstract">Detecting clusters of galaxies and active galactic nuclei in an eROSITA all-sky survey digital twin.</a>  Seppi, Comparat et al. 2022. (presentations on youtube: <a href="https://www.youtube.com/watch?v=2lDzrIk_2W0&t=10675s"> by R. Seppi </a> and by <a href="https://www.youtube.com/watch?v=FGkQkzYgMXQ"> by J. Comparat </a>)
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        <li>
        <a href="https://ui.adsabs.harvard.edu/abs/2022A%26A...661A..27L/abstract">Establishing the X-ray source detection strategy for eROSITA with simulations.</a>  Liu, Merloni, Comparat et al. 2022.
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	<li> Methods to simulate AGN and clusters in the X-ray
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	<ul>
	<li> Simulated events. 
	<a href="http://www2011.mpe.mpg.de/~comparat/eROSITA_mock">Simulated eROSITA light cones and photon lists (clusters and AGN)</a>
	</li>
	<li>AGN method. 
        <a href="https://ui.adsabs.harvard.edu/abs/2019MNRAS.487.2005C/abstract">Active galactic nuclei and their large-scale structure: an eROSITA mock catalogue. Comparat, Merloni, Salvato et al. 2019.</a> 
        </li>

        <li>Cluster method. 
        <a href="https://ui.adsabs.harvard.edu/abs/2020OJAp....3E..13C/abstract">Full-sky photon simulation of clusters and active galactic nuclei in the soft X-rays for eROSITA. Comparat, Eckert, Finoguenov et al. 2020.</a>
        </li>
	</ul>

	<li>
	Skies and Universes:
<a href="http://skiesanduniverses.org">(IAA, Spain)</a>,
	</li>

</ul>

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<a href="https://ui.adsabs.harvard.edu/abs/2017arXiv171106575C/abstract">Stellar population properties for 2 million galaxies from SDSS DR14 and DEEP2 DR4 from full spectral fitting.</a>  Comparat, Maraston et al. 2017

<ul>
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		<a href="https://firefly.mpe.mpg.de/v1_1_0/DEEP2/">DEEP2</a>
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		<a href="https://firefly.mpe.mpg.de/v1_1_0/">SDSS and eBOSS</a>
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		<a href="https://github.com/FireflySpectra/">Code repository</a>
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	<li>
		<a href="firefly_doc">Documentation</a>
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Emission line galaxy catalogues and luminosity functions (Articles from 2013-2016)

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<li>
Articles :
</li>

	<ul>
	<li>
	<a href="https://ui.adsabs.harvard.edu/abs/2015A%26A...575A..40C/abstract">The 0.1 z 1.65 evolution of the bright end of the [O ii] luminosity function.</a> Comparat, Richard, Kneib et al. 2015
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        <li>
        <a href="https://ui.adsabs.harvard.edu/abs/2016MNRAS.461.1076C/abstract">The evolution of the [O II], H β and [O III] emission line luminosity functions over the last nine billions years.</a> Comparat et, Zhu, Gonzalez-Perez al. 2016
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	</ul>


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Data and code :
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	<ul>
        <li>
		<a href="https://firefly.mpe.mpg.de/emission_line_data/LF_OII_Comparat2015/">[Oii] luminosity functions (2015 article)</a>
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        <li>
                <a href="https://firefly.mpe.mpg.de/emission_line_data/LF_OII_Hbeta_OIII_Comparat2016/">[Oii], H beta, [Oiii] luminosity functions (2016 article)</a>
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                <a href="https://firefly.mpe.mpg.de/emission_line_data/DEEP2/">DEEP2 data (2016 article)</a>
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                <a href="https://firefly.mpe.mpg.de/emission_line_data/VVDS/">VVDS data (2016 article)</a>
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		<a href="https://firefly.mpe.mpg.de/emission_line_data/VIPERS">VIPERS data (2016 article)</a>
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		<a href="https://github.com/JohanComparat/pySU">Code</a>
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	</ul>
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Stacking of optical spectra to create templates (e.g. for 4MOST)
        <ul>
        <li>
        <a href="https://github.com/JohanComparat/qmost_templates/">Stacked spectra repository</a>
	</li>
        </ul>

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Links:
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Github (Code)
<ul>
	<li> <a href="https://github.com/JohanComparat">my github repository</a> </li>
	<li> <a href="https://gitlab.mpcdf.mpg.de/joco">my gitlab repository</a> </li>
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PhD students 
<ul>
<li> S. Shreeram, 2023-, MPE Garching, Germany, with K. Nandra, 100%    </li>
<li> Y. Zhang, 2021-, MPE, with G. Ponti, K. Nandra, 50%                </li>
<li> R. Seppi, 2019-2023, MPE, with K. Nandra, 100%                     </li>
<li> J. Ider Chitham, 2017-2021, MPE, with K. Nandra, A. Finoguenov, 50%</li>
<li> F. Albareti, 2015-2018, UAM, Madrid, Espagne, with F. Prada, 20%   </li>
<li> S. Rodriguez-Torres, 2014-2017, UAM, with F. Prada, Pr. Yepes, 30% </li>
<li> G. Favole, 2012-2016, UAM, with F. Prada, 30%                      </li>
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Last update Sept. 2023