Galaxies Discovered behind the Milky Way by the Dwingeloo Obscured Galaxies Survey

Henning, P. A.; Kraan-Korteweg, R. C.; Rivers, A. J.; Loan, A. J.; Lahav, O.; Burton, W. B.

doi:10.1086/300215

Cited by 36 publications

(41 citation statements)

References 31 publications

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“…The HI searches for galaxies in the optical Zone of Avoidance carried out by, among others, Henning et al (1998) in the north, and by Henning et al (2000) and Juraszek (2000) in the south, were confined to |b| < 5…”

Section: Systematic Consequences Of Obscuration By H  In the Milky Waymentioning

confidence: 99%

An all–sky study of compact, isolated high–velocity clouds

Heij

Braun²,

Burton

2002

A&A

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105

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Abstract.We combine the catalog of compact high-velocity H  clouds extracted by de Heij et al. (2002) from the Leiden/Dwingeloo Survey in the northern hemisphere with the catalog extracted by from the Parkes HIPASS data in the southern hemisphere, and analyze the all-sky properties of the ensemble. Compact high-velocity clouds are a subclass of the general high-velocity cloud phenomenon which are isolated in position and velocity from the extended high-velocity Complexes and Streams down to column densities below 1.5 × 10 18 cm −2 . Objects satisfying these criteria for isolation are found to have a median angular size of less than one degree. We discuss selection effects relevant to the two surveys; in particular the crucial role played by obscuration due to Galactic H . Five principal observables are defined for the CHVC population: (1) the spatial deployment of the objects on the sky, (2) the kinematic distribution, (3) the number distribution of observed H  column densities, (4) the number distribution of angular sizes, and (5) the number distribution of H  linewidth. Two classes of models are considered to reproduce the observed properties. The agreement of models with the data is judged by extracting these same observables from simulations, in a manner consistent with the sensitivities of the observations and explicitly taking account of Galactic obscuration. We show that models in which the CHVCs are the H  counterparts of dark-matter halos evolving in the Local Group potential provide a good match to the observables. The best-fitting populations have a maximum HI mass of 10 7 M , a power-law slope of the HI mass distribution in the range −1.7 to −1.8, and a Gaussian dispersion for their spatial distributions of between 150 and 200 kpc centered on both the Milky Way and M 31. Given its greater mean distance, only a small fraction of the M 31 sub-population is predicted to have been detected in present surveys. An empirical model for an extended Galactic halo distribution for the CHVCs is also considered. While reproducing some aspects of the population, this class of models does not account for some key systematic features of the population.

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Section: Systematic Consequences Of Obscuration By H  In the Milky Waymentioning

confidence: 99%

An all–sky study of compact, isolated high–velocity clouds

Heij

Braun²,

Burton

2002

A&A

Self Cite

105

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“…Overall, the Milky Way remains optically opaque for extinction levels above A B ∼ > 5. m 0. This intransparent part of the ZOA regions is currently being filled in through the systematic blind H I searches the Dwingeloo Obscured Galaxy Survey (DOGS) in the north (Henning et al 1998; In the surrounding area the Lauberts galaxies are displayed (large dots, D ≥ 1. 0).…”

Section: The Galaxy Searchmentioning

confidence: 99%

A catalog of galaxies behind the Southern Milky Way

Kraan-Korteweg

2000

Astron. Astrophys. Suppl. Ser.

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“…This sample was updated by Huchtmeier & Richter (1988, 1989 and Karachentsev (1994) to reach 215 galaxies. Over the last years the nearby galaxy census was increased by H i line surveys of the Milky Way (Henning et al 1998), as well as a "blind" H i -survey of the southern sky with the Australian multibeam radio telescope (Kilborn et al 1999;Banks et al 1999). In addition to these activities 94 galaxies from the Karachentsev catalog were found to be within a distance of 10 Mpc, increasing the LV sample to a total of 387 galaxies.…”

Section: Introductionmentioning

confidence: 99%

HI observations of nearby galaxies

Huchtmeier

Караченцев

Караченцева³

2001

A&A

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Abstract. In this paper we present H i observations of nearby galaxies from two more lists of the Karachentsev catalog of candidates for nearby dwarf galaxies in the southern sky. Observations north of declination −31• were performed with the 100-m radio telescope at Effelsberg. Data for more southern galaxies were taken from HIPASS (www.atnf.csiro.au/research/multibeam). This sample is a supplement to the list of 94 southern dwarf galaxy candidates (1998, A&AS, 127, 409) located in the same declination range around the known Local Volume galaxies (i.e. galaxies within 10 Mpc, LV hereafter). We observed 17 galaxies not observed in the previous sample; and all 67 candidate dwarf galaxies from the SERC EJ sky survey and 81 objects from a supplementary list of candidate dwarf galaxies . This yields a total of 165 (=17 + 67 + 81) galaxies. Overall we have a detection rate of 48%. The sample of detected galaxies has the following median parameters: radial velocity VLG = 1127 km s −1 , H i line width W50 = 59 km s −1 , absolute blue magnitude M 0 BT = −14.4 mag, linear diameter A0 = 4.0 kpc, hydrogen mass-to-luminosity ratio 1.6 M /L . The sample of known galaxies within the Local Volume increased from 179 in 1979(Kraan-Korteweg & Tammann 1979 to 387 now. This corresponds to an increase in total luminosity of 22%. The known H i mass in the LV increased by 25%; the relative H i content MHI/LB increased from 0.21 to 0.26 for the whole volume. However we still might have missed half of the dwarf galaxies in the Local Volume.

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Galaxies Discovered behind the Milky Way by the Dwingeloo Obscured Galaxies Survey

Cited by 36 publications

References 31 publications

An all–sky study of compact, isolated high–velocity clouds

An all–sky study of compact, isolated high–velocity clouds

A catalog of galaxies behind the Southern Milky Way

HI observations of nearby galaxies

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