A catalog of galaxies behind the Southern Milky Way

Kraan-Korteweg, R. C.

doi:10.1051/aas:2000314

Cited by 35 publications

(36 citation statements)

References 16 publications

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“…1998 extinction maps, and the Cameron 1990 correction laws). This corresponds to the completeness limit of the deep optical ZOA galaxy catalogues to foreground extinction levels of A B ≤ 3. m 0 (Kraan-Korteweg 2000). It will therefore complement existing optical wholesky catalogues such as Nilson (1973) for the northern sky and Lauberts (1982) for the southern sky.…”

Section: Introductionmentioning

confidence: 65%

Parkes H I observations of galaxies behind the southern Milky Way

Schroeder

Kraan-Korteweg

Henning

2009

A&A

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As part of our programme to map the large-scale distribution of galaxies behind the southern Milky Way, we observed 314 opticallyselected, partially-obscured galaxies in the Zone of Avoidance (ZOA) in the Crux and Great Attractor (GA) regions. An additional 29 galaxies were observed in the Vela ZOA survey region (because of the small numbers they are not discussed any further). The observations were conducted with the Parkes 64 m (210 ft) radio telescope, in a single-pixel pointed mode, reaching an rms noise level of typically 2−6 mJy over the velocity search range of 400 < v < 10 500 km s −1 . A total of 162 galaxies were detected (plus 14 galaxies in the Vela region). The detection rate is slightly higher than for the Hydra/Antlia region (52% versus 45%) observed in the same way. This can be explained by the prominence of the GA overdensity in the survey regions, which leads to a relatively higher fraction of nearby galaxies. It is also evident from the quite narrow velocity distribution (largely confined to 3000−6000 km s −1 ) and deviates significantly from the expectation of a uniform galaxy distribution for the given sensitivity and velocity range. No systematic differences were found between detections and non-detections, in terms of latitude, foreground extinction, or environment, except for the very central part of the rich Norma cluster, where hardly any galaxies were detected. A detailed investigation of the H i content of the galaxies reveals strong H i deficiency at the core of the Norma cluster (within about a 0.4 Abell radius), similar to what has been found in the Coma cluster. The redshifts obtained by this observing technique result in a substantial reduction of the so-called redshift ZOA. This is obvious when analysing the large-scale structure of the new H i data in combination with data from other (optical) ZOA redshift surveys. The lower latitude detections provide further evidence of the extension of the Norma Wall, across the ZOA, in particular its bending towards the Cen-Crux clusters above the Galactic plane at slightly higher redshift, rather than a straight continuation towards the Centaurus clusters.

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Section: Introductionmentioning

confidence: 65%

Parkes H I observations of galaxies behind the southern Milky Way

Schroeder

Kraan-Korteweg

Henning

2009

A&A

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“…• , b ∼ +6 • ) made apparent by the optical search by Kraan-Korteweg (2000a) in the Hydra/Antlia extension was found to be due to a superposition of a nearby (∼3000 km s −1 ) filament connecting to the Hydra cluster, a more distant (∼6000 km s −1 ) shallow extended supercluster, and a very distant (∼16 000 km s −1 ) wall-like structure crossing the ZOA (Kraan-Korteweg et al 1995).…”

Section: Introductionmentioning

confidence: 88%

“…• ) in the extension of the Hydra and Antlia clusters (Kraan-Korteweg 2000a). The optical catalog is the first of a series of five systematic galaxy searches covering the southern Milky Way between Galactic longitudes 245…”

Section: Introductionmentioning

confidence: 99%

Parkes H I observations of galaxies behind the southern Milky Way

Kraan-Korteweg

Henning

Schroeder

2002

A&A

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As part of our program to map the large-scale distribution of galaxies behind the Milky Way, we used the Parkes 210 ft (64 m) radio telescope for pointed H I observations of a sample of low surface-brightness (due to heavy obscuration) spiral galaxies selected from the deep optical Zone of Avoidance (ZOA) galaxy catalog in the Hydra/Antlia region (Kraan-Korteweg 2000a). Searching a simultaneous velocity range of either 300 to 5500 km s −1 or 300 to 10 500 km s −1 to an rms level of typically 2 − 4 m Jy resulted in detections in 61 of the 139 pointings, leading to a total of 66 detections (an additional detection was made in a reference position, and two other pointings revealed two and four independent signals respectively). Except for 2 strong H I emitters identified in the shallow Zone of Avoidance H I survey (Henning et al. 2000), all H I detections are new. An analysis of the properties of the observed and detected galaxies prove that pointed H I observations of highly obscured galaxies allow the tracing of a population of nearby, intrinsically large and bright spiral galaxies that otherwise would not be recovered. The new data identified a previously unrecognized nearby group at ℓ ∼ 287. • 5, b ∼ −9. • 5, V ∼ 1700 km s −1 , the continuation of the Hydra/Antlia filament on the opposite side of the Galactic plane, and helped to delimit a distinct void in the ZOA centered at 2000 km s −1 .

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“…In particular, the 2MASS survey enabled examining the galaxy distribution in the 'zone of avoidance' the strip near the Milky Way plane (|b| < 10 o ) where the interstellar absorption screens extragalactic objects [96]. The galaxy distribution as derived from the 2MASS, 2dF, and APM surveys led to the conclusion that there is a 30% deficit of bright galaxies in the southern galactic hemisphere in comparison with the northern one [97].…”

Section: Galaxy Distributionmentioning

confidence: 99%

Sky surveys and deep fields of ground-based and space telescopes

Решетников¹

2005

Phys.-Usp.

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Selected results obtained in major observational sky surveys (DSS, 2MASS, 2dF, SDSS) and deep field observations (HDF, GOODS, HUDF, etc.) are reviewed. Modern surveys provide information on the characteristics and space distribution of millions of galaxies. Deep fields allow one to study galaxies at the stage of formation and to trace their evolution over billions of years. The wealth of observational data is altering the face of modern astronomy: the formulation of problems and their solutions are changing and all the previous knowledge, from planetary studies in the solar system to the most distant galaxies and quasars, is being revised.

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A catalog of galaxies behind the Southern Milky Way

Abstract: Abstract.A deep optical galaxy search in the southern Milky Way -aimed at reducing the width of the Zone of Avoidance -revealed 3279 galaxy candidates above the diameter limit of D ∼ > 0. 2, of which only 112 (3.4%) were previously catalogued. The surveyed region (266• and −10•

Cited by 35 publications

References 16 publications

Parkes H I observations of galaxies behind the southern Milky Way

Parkes H I observations of galaxies behind the southern Milky Way

Parkes H I observations of galaxies behind the southern Milky Way

Sky surveys and deep fields of ground-based and space telescopes

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