Mapping the Extended HI Distribution of Three Dwarf Galaxies

Abstract

We present large field HI-line emission maps obtained with the single-dish Green Bank Telescope centered on the dwarf irregular galaxies Sextans A, NGC 2366, and WLM. We do not detect the extended skirts of emission associated with the galaxies that were reported from Effelsberg observations (Huchtmeier et al. 1981). The ratio of HI at 10^19 atoms cm^-2 to optical extents of these galaxies are instead 2--3, which is normal for this type of galaxy. There is no evidence for a truncation in the HI distribution >/=10^19 atoms cm^-2.

To be published in AJ

References in corpus (4)

• The cold gaseous halo of NGC 891
• KK246, a dwarf galaxy with extended H I disk in the Local Void
• A High-Resolution Study of the HI Content of Local Group Dwarf Irregular Galaxy WLM
• On Measuring Accurate 21-cm Line Profiles with the Robert C. Byrd Green Bank Telescope

Cited by in corpus (12)

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• An Overview of the Dwarf Galaxy Survey
• The Resolved Structure and Dynamics of an Isolated Dwarf Galaxy: A VLT and Keck Spectroscopic Survey of WLM
• Accurate Galactic 21-cm H I measurements with the NRAO Green Bank Telescope
• JINGLE -- IV. Dust, HI gas and metal scaling laws in the local Universe
• A unified model for age-velocity dispersion relations in Local Group galaxies: Disentangling ISM turbulence and latent dynamical heating
• Numerical Simulations of Bubble-Induced Star Formation in Dwarf Irregular Galaxies with a Novel Stellar Feedback Scheme
• Joint Gas and Stellar Dynamical Models of WLM: An isolated dwarf galaxy within a cored, prolate DM halo
• MeerKAT-16 HI observation of the dIrr galaxy WLM
• The Karl G. Jansky Very Large Array Local Group L-band Survey (LGLBS)
• HI observations of Sextans A and B with the SKA pathfinder KAT-7
• Disentangling emission from star-forming regions in the Magellanic Clouds: Linking [OIII]88 micron and 24 micron