Large-scale magnetized outflows from the Virgo Cluster spiral NGC 4569. A galactic wind in a ram pressure wind

Details Large-scale magnetized outflows from the Virgo Cluster spiral NGC 4569. A galactic wind in a ram pressure wind Large-scale magnetized outflows from the Virgo Cluster spiral NGC 4569. A galactic wind in a ram pressure wind

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...447..465c&link_type=abstract

Astronomy and Astrophysics, Volume 447, Issue 2, February IV 2006, pp.465-472

Astronomy and Astrophysics

Astrophysics

29

Galaxies: Individual: Ngc 4569, Ic 3583, Galaxies:, Magnetic Fields, Radio Continuum: Galaxies

Scientific paper

Using the Effelsberg radio telescope at 4.85 GHz and 8.35 GHz we discovered large symmetric lobes of polarized radio emission around the strongly Hi deficient Virgo cluster spiral galaxy NGC 4569. These lobes extend up to 24 kpc from the galactic disk. Our observations were complemented by 1.4 GHz continuum emission from existing Hi observations. This is the first time that such huge radio continuum lobes are observed in a cluster spiral galaxy. The eastern lobe seems detached and has a flat spectrum typical of in-situ cosmic ray electron acceleration. The western lobe is diffuse and possesses vertical magnetic fields over its whole volume. The lobes are not powered by an AGN, but probably by a nuclear starburst that occurred ˜ 30 Myr ago, producing ≥ 105 supernovae. Since the radio lobes are symmetric, they resist ram pressure due to the galaxy's rapid motion within the intracluster medium.

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