Galactic recycling: the HI ring around NGC 1533

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/58035

Title: Galactic recycling: the HI ring around NGC 1533
Author(s): Ryan-Weber, Emma; Webster, Rachel; Bekki, Kenji
Abstract: We report the discovery of a new HI ring around the S0 galaxy NGC 1533. The ring orbits at a radius of 35 kpc, well outside the optical extent of the galaxy. We have conducted N-body/SPH numerical simulations to show this HI ring could be the merger remnant of a tidally destroyed galaxy. We find no optical component associated with the HI ring. However, observations hint at H-alpha emission associated with the SE part of the ring only. The H-alpha is in the form of a few very small isolated emission line regions. The large HI velocity dispersions (up to 30 km/s) and velocity gradients (up to 50 km/s kpc-1) in this region indicate the H-alpha emission could be due to star formation triggered by clouds colliding within the ring.
Publication type: Conference paper
Source: Astrophysics and space science library: The IGM/galaxy connection: the distribution of baryons at z=0: proceedings of a meeting held at Boulder, Colorado, United States, 08-10 August 2003 / Jessica L. Rosenberg and Mary E. Putman (eds.), Vol. 281, p. 223
Publication year: 2003
Keyword(s): NGC 1533
Publisher: Kluwer Academic Publishers
ISSN: 0067-0057 (series ISSN)
ISBN: 9781402012891, 1402012896
Publisher URL: http://www.springer.com/series/5664
Publisher URL: http://books.google.com.au/books?id=-u0_u8QFE_MC
Peer reviewed