Neutral Hydrogen in Nearby Dwarf Galaxies

Abstract

Here I briefly highlight our studies of the gas content, kinematics and star formation in nearby dwarf galaxies (D < 10 Mpc) based on the `Local Volume HI Survey' (LVHIS, Koribalski et al. 2018), which was conducted with the Australia Telescope Compact Array (ATCA). The LVHIS sample consists of nearly 100 galaxies, including new discoveries, spanning a large diversity in size, shape, mass and degree of peculiarity. The hydrogen properties of dwarf galaxies in two nearby groups, Sculptor and CenA / M83, are analysed and compared with many rather isolated dwarf galaxies. Around 10% of LVHIS galaxies are transitional or mixed-type dwarf galaxies (dIrr/dSph), the formation of which is explored. - I also provide a brief update on WALLABY Early Science, where we focus on studying the HI properties of galaxies as a function of environment. WALLABY (Dec < +30 degr, z < 0.26) is conducted with the Australian SKA Pathfinder (ASKAP), a 6-km diameter array of 36 x 12-m dishes, each equipped with wide-field (30 sq degr) Chequerboard Phased Array Feeds.

arXiv commentPublished in IAU Symposium No. 344 "Dwarf Galaxies: From the Deep Universe to the Present" proceedings, 2019, eds. K. B. W. McQuinn & S. Stierwalt (4 pages, 2 figures)

References in corpus (20)

• The HIPASS Catalogue - I. Data Presentation
• The 1000 Brightest HIPASS Galaxies: HI Properties
• New Lessons from the HI Size-Mass Relation of Galaxies
• SoFiA: a flexible source finder for 3D spectral line data
• The Northern HIPASS catalogue - Data presentation, completeness and reliability measures
• The Local Volume HI Survey (LVHIS)
• Automated Kinematic Modelling of Warped Galaxy Discs in Large Hi Surveys: 3D Tilted Ring Fitting of HI Emission Cubes
• Overview on spectral line source finding and visualisation
• Gas and dark matter in the Sculptor group: NGC 300
• The intriguing HI gas in NGC 5253: an infall of a diffuse, low-metallicity HI cloud?
• The busy function: a new analytic function for describing the integrated 21-cm spectral profile of galaxies
• Gas Dynamics and Star Formation in the Galaxy Pair NGC1512/1510
• ASKAP HI imaging of the galaxy group IC 1459
• 2D Bayesian automated tilted-ring fitting of disk galaxies in large HI galaxy surveys: 2DBAT
• Gas and Star Formation in the Circinus Galaxy
• The Local Volume HI Survey: star formation properties
• A kinematic study of the neutral and ionised gas in the irregular dwarf galaxies IC 4662 and NGC 5408
• Gas and dark matter in the Sculptor group: NGC 55
• HI debris in the IC 1459 galaxy group
• Local Volume HI Survey: the far-infrared radio correlation