2005/04/10 by S. Mühle, S. Muehle, U. Klein +4
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Dwarf galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Halo #Interstellar medium #Physics #Star formation #Stellar, planetary, and galactic studies #Supernova #astro-ph
paper · pdf · doi:10.1086/429888
published as Astron.J.130:524-538,2005; Erratum-ibid.132:443,2006 · 22 pages, 13 figures, accepted by AJ
arxiv created 2005/04/10 · openalex publication_date 2005/07/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/08
As part of our study on the impact of violent star formation on the interstellar medium (ISM) of dwarf galaxies, we report observations of neutral atomic hydrogen (HI) in the post-starburst dwarf galaxy NGC 1569. High-resolution measurements with the VLA (B-, C- and D-array) are aimed at identifying morphological and kinematical signatures in the HI caused by the starburst. Our kinematical data suggest a huge hole in the HI distribution, probably due to the large number of supernovae explosions in the center of the galaxy over the past 20 Myr. Investigating the large-scale HI structure, we confirm the existence of a possible HI companion and a so-called HI bridge east of NGC 1569. Furthermore, we report the detection of additional low-intensity HI halo emission, which leads us to suggest a revised halo structure. Based on the new picture, we discuss the origin of the halo gas and possible implications for the evolution of the starburst in NGC 1569.