On the neutral gas content and environment of NGC 3109 and the Antlia dwarf galaxy

D. G. Barnes; W. J G De Blok

doi:10.1086/321170

On the neutral gas content and environment of NGC 3109 and the Antlia dwarf galaxy

D. G. Barnes, W. J G De Blok

Research output: Contribution to journal › Article › Research › peer-review

40 Citations (Scopus)

Abstract

As part of a continuing survey of nearby galaxies, we have mapped the neutral gas content of the low surface brightness Magellanic-type galaxy NGC 3109 and its environment, including the Antlia dwarf galaxy, at unprecedented velocity resolution and brightness sensitivity. The H I mass of NGC 3109 is measured to be 3.8 ± 0.5 x 10⁸ M_⊙. A substantial warp in the disk of NGC 3109 is detected in the H I emission image in the form of an extended low surface brightness feature. We report a positive detection in H I of the nearby Antlia dwarf galaxy and measure its total neutral gas mass to be 6.8 ± 1.4 x 10⁵ M_⊙. We show the warp in NGC 3109 to lie at exactly the same radial velocity as the gas in the Antlia dwarf galaxy and speculate that Antlia disturbed the disk of NGC 3109 during a mild encounter ∼1 Gyr in the past. H I data for a further eight galaxies detected in the background are presented.

Original language	English
Pages (from-to)	825-829
Number of pages	5
Journal	The Astronomical Journal
Volume	122
Issue number	2
DOIs	https://doi.org/10.1086/321170
Publication status	Published - 1 Aug 2001
Externally published	Yes

Keywords

Galaxies: individual (Antlia dwarf, NGC 3109)
Galaxies: interactions
Local Group

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10.1086/321170

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title = "On the neutral gas content and environment of NGC 3109 and the Antlia dwarf galaxy",

abstract = "As part of a continuing survey of nearby galaxies, we have mapped the neutral gas content of the low surface brightness Magellanic-type galaxy NGC 3109 and its environment, including the Antlia dwarf galaxy, at unprecedented velocity resolution and brightness sensitivity. The H I mass of NGC 3109 is measured to be 3.8 ± 0.5 x 108 M⊙. A substantial warp in the disk of NGC 3109 is detected in the H I emission image in the form of an extended low surface brightness feature. We report a positive detection in H I of the nearby Antlia dwarf galaxy and measure its total neutral gas mass to be 6.8 ± 1.4 x 105 M⊙. We show the warp in NGC 3109 to lie at exactly the same radial velocity as the gas in the Antlia dwarf galaxy and speculate that Antlia disturbed the disk of NGC 3109 during a mild encounter ∼1 Gyr in the past. H I data for a further eight galaxies detected in the background are presented.",

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author = "Barnes, {D. G.} and {De Blok}, {W. J G}",

year = "2001",

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T1 - On the neutral gas content and environment of NGC 3109 and the Antlia dwarf galaxy

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AU - De Blok, W. J G

PY - 2001/8/1

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N2 - As part of a continuing survey of nearby galaxies, we have mapped the neutral gas content of the low surface brightness Magellanic-type galaxy NGC 3109 and its environment, including the Antlia dwarf galaxy, at unprecedented velocity resolution and brightness sensitivity. The H I mass of NGC 3109 is measured to be 3.8 ± 0.5 x 108 M⊙. A substantial warp in the disk of NGC 3109 is detected in the H I emission image in the form of an extended low surface brightness feature. We report a positive detection in H I of the nearby Antlia dwarf galaxy and measure its total neutral gas mass to be 6.8 ± 1.4 x 105 M⊙. We show the warp in NGC 3109 to lie at exactly the same radial velocity as the gas in the Antlia dwarf galaxy and speculate that Antlia disturbed the disk of NGC 3109 during a mild encounter ∼1 Gyr in the past. H I data for a further eight galaxies detected in the background are presented.

AB - As part of a continuing survey of nearby galaxies, we have mapped the neutral gas content of the low surface brightness Magellanic-type galaxy NGC 3109 and its environment, including the Antlia dwarf galaxy, at unprecedented velocity resolution and brightness sensitivity. The H I mass of NGC 3109 is measured to be 3.8 ± 0.5 x 108 M⊙. A substantial warp in the disk of NGC 3109 is detected in the H I emission image in the form of an extended low surface brightness feature. We report a positive detection in H I of the nearby Antlia dwarf galaxy and measure its total neutral gas mass to be 6.8 ± 1.4 x 105 M⊙. We show the warp in NGC 3109 to lie at exactly the same radial velocity as the gas in the Antlia dwarf galaxy and speculate that Antlia disturbed the disk of NGC 3109 during a mild encounter ∼1 Gyr in the past. H I data for a further eight galaxies detected in the background are presented.

KW - Galaxies: individual (Antlia dwarf, NGC 3109)

KW - Galaxies: interactions

KW - Local Group

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DO - 10.1086/321170

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JO - The Astronomical Journal

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ER -

On the neutral gas content and environment of NGC 3109 and the Antlia dwarf galaxy

Abstract

Keywords

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