Kinematics of the Ionised Gas in the Spiral Galaxy NGC 2403

Details Kinematics of the Ionised Gas in the Spiral Galaxy NGC 2403 Kinematics of the Ionised Gas in the Spiral Galaxy NGC 2403

2004-05-31

arxiv.org/abs/astro-ph/0405619v1

Astron.Astrophys. 424 (2004) 485-495

Astronomy and Astrophysics

Astrophysics

17 pages, 10 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20040529

We present a study of the kinematics of the ionised gas in the nearby spiral galaxy NGC 2403 using deep long-slit spectra obtained with the 4.2-m William Herschel Telescope. The data show the presence of a halo component of ionised gas that is rotating more slowly than the gas in the disk. The kinematics of this ionised halo gas is similar to that of the neutral halo gas. On small scales, broad line profiles (up to 300 km/s wide) indicate regions of fast outflows of ionised gas. We discuss these new results in the context of galactic fountain models.

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