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Astronomy Seminar Series artwork
October 19, 202011:30 am – 12:30 pm (CDT)

Mapping the Cool CGM at z≈1


Johannes Zabl (Centre de Recherche Astrophysique de Lyon)


Stephanie Ho

Event Details

Galaxies are believed to evolve regulated by the flows of gas from and to the surrounding circumgalactic medium (CGM). However, directly observing these circumgalactic gas flows around typical galaxies in the distant Universe remains a challenge. While the low-density gas can be studied in background quasar sight-lines, large samples of galaxy-absorber pairs with well-constrained galaxy properties and kinematics are required to interpret these observations. Thanks to the panoramic IFU spectrograph MUSE, collecting such samples has become feasible at z≈1. In this talk, I will present statistical results for distribution, properties, and kinematics of the cool CGM gas (probed by MgII), as obtained from the MusE GAs FLOw and Wind (MEGAFLOW) survey. Further, I will show that the MUSE observations start to allow to directly map the CGM around typical individual galaxies through MgII emission.

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