J/AJ/112/1803 Large Scale Structure (Marzke+ 1996)
Large-Scale Structure at Low Galactic Latitude
Marzke R.O., Huchra J.P., Geller M.J.
<Astron. J. 112, 1803 (1996)>
=1996AJ....112.1803M 1996AJ....112.1803M
ADC_Keywords: Clusters, galaxy
Abstract:
We have extended the CfA Redshift Survey to low galactic latitudes to
investigate the relation between the Great Wall in the North Galactic
Cap and the Perseus-Pisces chain in the South Galactic Cap. We present
redshifts for 2020 galaxies in the Catalogue of Galaxies and of
Clusters of Galaxies (Zwicky et al. 1961-68, CGCG, Cat. VII/4) in
the following regions: 4h≤RA≤8h, 17h≤Dec.≤20h, 0deg≤Dec.≤45deg.
In these regions, the redshift catalogue includes 1664 galaxies with
B(0)≤15.5 (of which 820 are newly measured) and is 97% complete. We
also include redshifts for an additional 356 galaxies in these regions
with B(0)>15.5; of these, 148 were previously unmeasured. The CGCG
samples the galaxy distribution down to b(II)∼10deg. In this paper,
we discuss the acquisition and reduction of the spectra, and we
examine the qualitative features of the redshift distribution. The
Great Wall and the Perseus-Pisces chain are not simply connected
across the Zone of Avoidance. These structures, which at first appear
to be coherent on scales of ∼100h-1Mpc or more, actually form the
boundaries of neighboring voids of considerably smaller scale,
approximately 50h-1Mpc. The structures delineated by our
optically-selected sample are qualitatively similar to those detected
by the far-infrared-selected IRAS 1.2 Jansky Survey (Fisher et al.,
1995ApJS..100...69F 1995ApJS..100...69F). Although the IRAS survey probes more deeply into
the Zone of Avoidance, our optically-selected survey provides better
sampling of structures at b_(II)≥10deg.
(Copyright) 1996 American Astronomical Society.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 1664 The Galactic Plane Survey [B(0)≤15.5]
table2.dat 97 356 The Galactic Plane Survey [B(0)≥15.5]
notes.dat 38 78 Notes to tables 1 and 2
refs.dat 182 72 Velocity sources (Table 3)
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See also:
VII/193 : The CfA Redshift Catalogue, Version June 1995 (Huchra+ 1995)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Source name
12 A1 --- Note [*] indicates a note in file "notes.dat"
13- 14 I2 h RAh Right Ascension (1950)
15 A1 --- --- Always ':'
16- 17 I2 min RAm Right Ascension (1950)
18 A1 --- --- Always ':'
19- 22 F4.1 s RAs Right Ascension (1950)
24 A1 --- DE- Sign, Declination
25- 26 I2 deg DEd Declination (1950)
27 A1 --- --- Always ':'
28- 29 I2 arcmin DEm Declination (1950)
30 A1 --- --- Always ':'
31- 32 I2 arcsec DEs Declination (1950)
34- 39 F6.2 mag m(zw) Zwicky B(0) magnitude
40 A1 --- r_m(zw) *Source code for m(zw) (if not from CGCG)
42- 47 I6 km/s HRV ? Heliocentric radial velocity, cz
49- 52 I4 km/s e_HRV ? Error in HRV
55- 58 A4 --- r_HRV Redshift source code (see refs.dat)
61- 62 A2 --- Morph *Morphological type
64 A1 --- Bar *Bar type
66 A1 --- Lum *Luminosity class
68 A1 --- Pec *Peculiarities
70- 74 F5.1 arcmin D1 ? Major axis diameter
76- 79 F4.1 arcmin D2 ? Minor axis diameter
81- 86 A6 --- UGC UGC (Cat. VII/26>) number
89- 97 A9 --- Comments *Comments & references to other catalogues
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Note on r_m(zw):
Source code for magnitude if not from CGCG. "H" refers to magnitudes
split by eye by JPH; "K" refers to magnitudes from Kirshner et al.
(1978, Cat. J/AJ/83/1549; 1983, J/AJ/88/1285).
Note on Morph:
Morphological types are de Vaucouleurs' T types from the RC2, Uppsala Catalog
and the Revised Shapley-Ames Catalog. Some additional types have been defined
for peculiar and untyped objects and for objects that are in catalogues of
extragalactic objects but are really galactic in nature.
Additional types for galaxies in the CfA Redshift Survey region (described
below) have been estimated by J. Huchra from glass copies of the Palomar Sky
Survey.
Types for southern galaxies come from both the ESO catalog and the
Vorontsov-Velyaminov Catalogs.
Morphological types codes are:
-7 Elliptical (Unclassified)
-6 Compact Elliptical
-5 E, and dwarf E
-4 E/S0
-3 L-, SO-
-2 L, SO
-1 L+, SO+
0 SO/a, SO-a
1 Sa
2 Sab
3 Sb
4 Sbc
5 Sc
6 Scd
7 Sd
8 Sdm
9 Sm, Magellanic Spiral
10 Im, Irr I, Magellanic Irregular, Dwarf Irregular
11 Compact Irregular, Extragalactic HII Region
15 Peculiar, Unclassifiable
16 Irr II
20 S..., Sc-Irr, Unclassified Spiral
25 Plate Flaw, Star, etc. misclassified as galaxy
33 Reflection Nebula, misclassified as galaxy
32 HII Region misclassified as galaxy
30 Planetary Nebula, misclassified as galaxy
40 Part of a galaxy, e.g. a bright HII region like N5471
Note on Bar:
A unbarred
X mixed type
B barred
Note on Lum:
Luminosity Classes (for Spirals and Irregulars)
1 I 6 III-IV
2 I-II 7 IV
3 II 8 IV-V
4 II-III 9 V
5 III
Note on Pec:
P = Peculiar
S = No inner ring
R = Ringed (outer)
T = Pseudo inner ring
D = Double or Multiple
Note on Comments:
If the comment is "See Notes," then there is a note about a superposed
star in the corresponding notes file.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Source name
15- 38 A24 --- Note Superposed star(s) name(s) or other note
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Source Redshift source code
8- 182 A175 --- Reference Reference to redshift source
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Origin: AAS CD-ROM series, Volume 8, 1997 Lee Brotzman [ADS] 30-Mar-1997
(End) [CDS] 03-Jul-1997