A new galaxy in the local group: The antlia dwarf galaxy.

Whiting, Alan B.; Irwin, M. J.; Hau, G. K. T.

doi:10.1086/118530

Cited by 36 publications

(36 citation statements)

References 23 publications

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“…considerably lower than that of Whiting, Irwin, & Hau (1997), who used the data of et al (1990) to deterFouque mine a total H I mass of Antlia2 of order 1.0^0.2 ] 106…”

Section: H I Content Of the Antlia Dwarf Galaxymentioning

confidence: 92%

On the Neutral Gas Content and Environment of NGC 3109 and the Antlia Dwarf Galaxy

Barnes

Blok

2001

The Astronomical Journal

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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 ] 108A substantial warp in the disk of NGC 3109 is detected in the H I M _ . 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 ] 105We show the warp in NGC 3109 to lie at exactly the same radial velocity as the gas in the Antlia M _ . dwarf galaxy and speculate that Antlia disturbed the disk of NGC 3109 during a mild encounter D1 Gyr in the past. H I data for a further eight galaxies detected in the background are presented.

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“…considerably lower than that of Whiting, Irwin, & Hau (1997), who used the data of et al (1990) to deterFouque mine a total H I mass of Antlia2 of order 1.0^0.2 ] 106…”

Section: H I Content Of the Antlia Dwarf Galaxymentioning

confidence: 92%

On the Neutral Gas Content and Environment of NGC 3109 and the Antlia Dwarf Galaxy

Barnes

Blok

2001

The Astronomical Journal

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“…The two most recent nominees, dwarf spheroidals in Tucana (Ap92, § 10.5, with additional data given by Saviane et al 1996) and in Antlia (Whiting et al 1997) were both catalogued a couple of decades ago (Skiff 1997) by Corwin, de Vaucouleurs, & de Vaucouleurs (1977. The less trusting author has checked that the Antlia dwarf indeed occurs on the page cited as object 1001.9Ϫ2705.…”

Section: Dwarfs (More Than Seven and Not All Snow White)mentioning

confidence: 97%

Astrophysics in 1997

Trimble¹,

McFadden²

1998

PUBL ASTRON SOC PAC

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ABSTRACT. Martian marvels, a gamma-ray burster with a redshift, Galileo converses with Ganymede, a record galactic redshift of 4.92, and much else. Fiscal 1997 was definitely an exciting year for astronomers. We have tried hard to hit all the obvious highlights, but also to report more gradual progress on traditional problems of understanding planets, stars, galaxies, and the universe. Though the year was saddened by the loss of many valued colleagues, we nevertheless indulge in occasional soupçons of frivolity.

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“…A fifth dSph, Antilia, was first cataloged by Corwin, de Vaucouleurs, & de Vaucouleurs (1985) and Feitzinger & Galinski (1985) and detected in H i by Fouque et al (1990), who suspected it to be a Local Group member. Follow-up photometry confirming this conjecture was not acquired until the galaxy was rediscovered by Whiting, Irwin, & Hau (1997) several years later. In addition to these recent discoveries, Mateo (1998) notes that there is an apparent deficit of dwarf galaxies at low Galactic latitudes (relative to a uni-form distribution on the sky).…”

Section: A New Techniquementioning

confidence: 99%

The Absence of Stars in Compact High‐Velocity Clouds

Simon

Blitz

2002

ApJ

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We present the results of our search for faint Local Group dwarf galaxies in compact high-velocity clouds (HVCs). We used digitized Palomar Observatory Sky Survey (POSS) data to examine 1 deg 2 of sky around each of $250 northern hemisphere HVCs. The POSS images were processed to remove foreground stars and large-scale backgrounds, smoothed to enhance arcminute-sized low surface brightness features, and then compared with the original plates. Using this technique, we located 60 candidate dwarf galaxies in the $250 deg 2 that we surveyed. Follow-up observations of these candidates have revealed several distant clusters of galaxies and a number of possible Galactic cirrus clouds, but no Local Group dwarfs. It appears that many of the low surface brightness features in the sky survey data are plate flaws. The second-generation red POSS plates are sensitive down to surface brightness levels of 25-26 mag arcsec À2 , and our follow-up images reached 10 limiting magnitudes of R ¼ 21-23 for point sources. Given these limits, all known Local Group galaxies except four of the very diffuse, extended dwarf spheroidals located within 100 kpc of the Milky Way would have been detected had they been in our survey. Therefore, we can rule out the possibility that these HVCs are associated with normal but faint dwarf galaxies. If compact HVCs do contain stars, they must have surface brightnesses e1 mag arcsec À2 fainter than most known Local Group galaxies.

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A new galaxy in the local group: The antlia dwarf galaxy.

Cited by 36 publications

References 23 publications

On the Neutral Gas Content and Environment of NGC 3109 and the Antlia Dwarf Galaxy

On the Neutral Gas Content and Environment of NGC 3109 and the Antlia Dwarf Galaxy

Astrophysics in 1997

The Absence of Stars in Compact High‐Velocity Clouds

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