MAPPING THE EXTENDED H I DISTRIBUTION OF THREE DWARF GALAXIES

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/142/5/173· OSTI ID:22034355

Hunter, Deidre A; Zahedy, Fakhri; Bowsher, Emily C ^[1]; Wilcots, Eric M; Kepley, Amanda A; Gaal, Veronika ^[2]

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1. Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001 (United States)
2. Department of Astronomy, University of Wisconsin, 475 North Charter Street, Madison, WI 53706-1582 (United States)

We present large field H I-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. The ratio of H I at 10{sup 19} atoms cm{sup -2} to optical extents of these galaxies is instead 2-3, which is normal for this type of galaxy. There is no evidence for a truncation in the H I distribution {>=}10{sup 19} atoms cm{sup -2}.

• OSTI ID: 22034355
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 142, Issue 5; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTRONOMY
ASTROPHYSICS
DISTRIBUTION
GALAXIES
HYDROGEN 1
MAPPING
PHOTON EMISSION
TELESCOPES