Hi, I am an observational astrophysicist with expertise in radio and X-ray observations of galaxy clusters, jellyfish galaxies, and cluster radio sources.

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Education

Employment

  • 2022-2025: Postdoctoral researcher at INAF - Osservatorio di Padova (Padova, Italy)
    Project: "Galaxies in clusters: the radio and X-ray view"
    Supervisor: Dr. Bianca M. Poggianti
  • 2021-2022: Postdoctoral researcher at INAF - Osservatorio di Padova (Padova, Italy)
    Project: "Characterizing galaxy evolution in clusters at radio wavelengths"
    Supervisor: Dr. Benedetta Vulcani
  • 08/2019 - 11/2019: Visiting Ph.D. student at Sterrewacht Leiden (Leiden, NL)
    Project "Detecting diffuse emission at the center of relaxed cluster with LOFAR"
    Supervisor: Prof. Huub Rottgering

Other

  • Since 2022: Member of the International Astronomy Union

Research

Ongoing projects:

Jellyfish galaxies

Ram pressure stripping, where the hot, pressurized intracluster medium (ICM) sweeps away a galaxy's interstellar medium (ISM), significantly influences galaxy evolution in clusters. "Jellyfish" galaxies, with their long tails of ionized plasma extending tens of kpc, offer insights into star formation in extreme conditions and the interactions between hot and cold plasmas.

[Image caption: Composite MUSE and LOFAR images of jellyfish galaxies .]

Radio emission in galaxy clusters

In galaxy clusters we can observe the largest radio sources in the universe. These objects are produced by complex interactions between magnetic field, cosmic rays and hot plasma. My research is focused on the study of the physical connection between the thermal and non-thermal plasma.

[Image caption: LOFAR image of the Kite radio source in Abell 2626.]

PT-REX

The study of spatial correlations between different emissions can provide key insights into the physical processes beneath. I developed the Point-to-point TRend Extractor (PT-REX) to automate this analysis. PT-REX can be used to compare radio, X-ray or optical emission with a set of different statistica tools. For further information, check out the article.

Contact me

  • E-mail: alessandro.ignesti@inaf.it
  • Work address: Vicolo dell'Osservatorio, 5, 35122 Padova PD, Italy