J/ApJS/107/521 Galaxies redshifts, 210<l<360, |b|<15 (Visvanathan+ 1996)
Redshift distribution of galaxies in the southern Milky way
region 210°<l<360° and |b|<15°.
Visvanathan N., Yamada T.
<Astrophys. J. Suppl. Ser. 107, 521 (1996)>
=1996ApJS..107..521V 1996ApJS..107..521V (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Redshifts ; Infrared sources
Keywords: cosmology: observations - galaxies: distances and redshifts
Abstract:
We have carried out a redshift survey of an IRAS flux-limited
(f60>0.6) galaxy sample behind the southern Milky Way,
210°<l<360° at |b|<15°. The survey includes redshifts for
951 galaxies, ∼500 of which are new. Of these 951 galaxies, 462 are in
the zone 5°<b<15° and 353 are in the zone -15°<b←5°.
Though the innermost region of the Milky Way (|b|=5°) remains
opaque except in the longitude near 240, the detected galaxies show a
high degree of completeness (∼70%) in the zones 5°<b<15° and
-15°<b←5°. The cone diagrams exhibiting the detailed
distribution of IRAS galaxies in the region 210°<l<360°,
|b|<15° shows two clusters in the Puppis region (l=240°,
b=-7°, v=2400km/s; l=245°, b=-5°, v=7500km/s), the A3627
cluster (l=325°, b=-7°; v=4500km/s), the S4 cluster
(l=280°, b=7°; v=5500km/s), and a possible void at l=245°,
v=3000km/s. The region 270°<l<350° is dominated by overdensity
of galaxies representing the extension of the Hydra-Centaurus complex
in the positive latitudes and the Pavo-Indus complex in the negative
latitudes. A velocity histogram of galaxies in the GA region
290°<l<350°, |b|<15°. reveals a substantial overdensity of
galaxies in the velocity range 2400-5000km/s. The centroid of this
overdensity is located at 4000km/s. The broad increased density of
galaxies seen in our data corresponds with the distant concentration
seen at 4500km/s in the supergalactic plane survey that covers the
same longitude range like ours in l, but a larger range in latitude b
(-30° to -10° and +10° to +45°). This lends support to
the idea that the overdensity extends all the way from the
Centaurus-Hydra complex (l=302°, b=+22°) in the north to the
major concentration of the Pavo-Indus supercluster (l=332°,
b=-24°) in the south, through the Milky Way. We conclude that the
peak of the overdensity responsible for the peculiar velocity field in
the local region is possibly situated in the Milky Way itself.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 45 951 List of galaxies behind the southern Milky Way
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See also:
III/40 : Spectral Survey of Southern Milky Way (Loden+ 1976)
VII/140 : Catalog of Galaxies Behind the Milky Way (Saito+ 1990,91)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
J/A+AS/104/529 : IRAS galaxies behind the Milky Way (Takata+ 1994)
J/MNRAS/287/472 : Southern Milky Way galaxies velocities (Di Nella+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS-PSC (Cat. II/125) name
11 A1 --- Typo [*] Correction, see "History" section below
12- 17 F6.2 deg GLON Galactic longitude
19- 24 F6.2 deg GLAT Galactic latitude
26- 31 I6 km/s cz Heliocentric redshift
32 A1 --- n_cz [abcS] Note on cz (1)
34- 39 F6.2 Jy S60um Flux density at 60µm
41- 44 F4.1 mag Bmag ? B magnitude
45 A1 --- n_Bmag [c] Note on Bmag (2)
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Note (1): S: radial velocity data kindly provided by W. Saunders.
a: Radial velocity data kindly provided by K. B. Fisher.
b: Radial velocity data listed in Yamada et al. (1993ApJS...89...57Y 1993ApJS...89...57Y)
c: Radial velocity taken from SIMBAD.
Note (2): c: Blue magnitudes taken from SIMBAD
Unfootnoted B magnitude values are estimated roughly from size for
galaxies in Yamada et al. (1993ApJS...89...57Y 1993ApJS...89...57Y).
Magnitudes of galaxies provided by K. B. Fisher are not available.
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History: Prepared via OCR at CDS.
* 30-Sep-1998: 7 errors in the paper (indicated by an '*' in Typo column
of table1.dat) were detected by H. Andernach ()
and corrected.
(End) James Marcout, Patricia Bauer [CDS] 12-May-1998