Deep polarization observations of a ram pressure stripped galaxy, NGC 4522

  • Choi, Woorak (Department of Astronomy, Yonsei University) ;
  • Chung, Aeree (Department of Astronomy, Yonsei University) ;
  • Kim, Chang-goo (Department of Astrophysical Sciences, Princeton University) ;
  • Lee, Bumhyun (Kavli Institute for Astronomy and Astrophysics, Peking University)
  • Published : 2020.10.13

Abstract

We present high-resolution, high-sensitivity continuum data of NGC 4522 observed at 3 cm (X-band) and 10 cm (S-band) in full polarization mode using the JVLA. This observation has 2 - 4 times better spatial resolution and 2 - 5 times better sensitivity compared to previous continuum observations. NGC 4522 is a Virgo spiral galaxy undergoing active ram pressure stripping. This galaxy is particularly well known for the CO emission detected outside its stellar disk, some of which coincides with the extraplanar HI gas and Halpha patches. The major goal of our JVLA observation is to leverage our understanding of the influence of the ram pressure on the general ISM field and multi-phase medium. By combining our new deep radio continuum data and previous observations, we will investigate how the B-field properties can be affected by the ram pressure, and what roles the B-field plays in the stripping process of the multi-phased ISM and in the star formation activity when the ram pressure is present.

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