CFA2S - CfA Redshift Survey: South Galactic Cap Data

Overview

The Center for Astrophysics (CfA) Redshift Survey South Galactic Cap (CFA2S) Catalog contains redshifts for a sample of about 4300 galaxies with blue (Zwicky B(0) type) magnitude <= 15.5 covering the range from 20 h to 4h in right ascension and from -2.5 deg to 90 deg in declination. This sample is complete for all galaxies in the merge of the Zwicky et al. and Nilson catalogs in the south Galactic cap. Redshifts for 2964 of these were measured as part of the second CfA Redshift Survey. The data reveal large voids in the foreground and background of the Perseus-Pisces Supercluster. The largest of these voids lies at a mean velocity ~ 8000km/s, has diameter of ~ 5000km/s, and is enclosed by a complex of dense structures. The large structure known as the Perseus-Pisces Supercluster forms the near side of this complex. On the far side of this large void, at a mean velocity of ~ 12000km/s, there is another coherent dense wall. The structures in this survey support the view that galaxies generally lie on surfaces surrounding or nearly surrounding low-density regions or voids.

Catalog Bibcode

1999ApJS..121..287H

References

The CfA redshift survey: data for the South Galactic Cap.
       Huchra J.P., Vogeley M.S., Geller M.J.
      <Astrophys. J. Suppl. Ser. 121, 287 (1999)>
      =1999ApJS..121..287H      (SIMBAD/NED BibCode)

Provenance

This table was created by the HEASARC in March 2005 based on CDS table J/ApJS/121/287/cfa2s.dat.gz

Parameters

Name
The name of the galaxy. Following the RC1 and RC2, galaxies that appear in the NGC and IC catalogs are listed using their NGC or IC designations. Non-NGC or -IC galaxies that are listed in the Zwicky catalog or the UGC have been given an IAU style coordinate name of the form HHMMm+DDMM where HHMMm is the RA in hours, minutes and tenths of minutes, and +DDMM (or -DDMM) is the declination in degrees and arcminutes. These coordinate names are derived from the original Zwicky catalog position, even if a more accurate position has been measured. Bright anonymous galaxies which are not in Zwicky or the UGC are designated as AHHMM+DDMM, i.e., with a leading "A" and no fractional minutes. The HEASARC has added the Dictionary of Nomenclature of Celestial Objects recommended prefix for objects in this catalog of "[HVG99b]".

RA
The Right Ascension of the galaxy in the selected equinox. This was given in B1950 coordinates and to a precision of 0.1 seconds of time in the original table. These coordinates are primarily from the Zwicky catalog. For brighter galaxies, for Markarian galaxies, for some objects with improved coordinates in the PGC and RC3, and for many objects from the DSS whose positions have been measured, improved coodinates are listed.

Dec
The Declination of the galaxy in the selected equinox. This was given in B1950 coordinates and to a precision of 1 arcsecond in the original table. These coordinates are primarily from the Zwicky catalog. For brighter galaxies, for Markarian galaxies, for some objects with improved coordinates in the PGC and RC3, and for many objects from the DSS whose positions have been measured, improved coodinates are listed.

LII
The Galactic Longitude of the galaxy.

BII
The Galactic Latitude of the galaxy.

Bmag
The apparent blue magnitude in the Zwicky-B(0) system (Huchra 1976, AJ, 81, 952). These magnitudes are from the RC1 or the merged Zwicky-Nilson catalog, unless otherwise noted by the presence of a non-blank code in the ref_bmag parameter.

Ref_Bmag
This parameter contains a code for a magnitude reference if the magnitude is not from either the RC1 or the merged Zwicky-Nilson catalog, where "B" means that the quoted value is a B_T magnitude which has been converted to the B(0)-Zwicky system, "H" that it is a split Zwicky magnitude (for multiple galaxies), "M" that it is from Markarian and Lipovetskii (1974) and "S" that it is from Sakai, Giovanelli and Wegner (1994).

Radial_Velocity
The heliocentric radial velocity of the galaxy, in km/s.

Radial_Velocity_Error
The RMS uncertainty in the heliocentric radial velocity, in km/s.

Ref_Radial_Velocity
A code for the reference for the radial velocity. The key to the codes is given in Table 2 of the published paper and is also available at https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/121/287/refs.dat.gz

Morph_Type
The numerically coded, revised Hubble (morphological) Type of the galaxy. Numerically coded Hubble types were introduced in the RC2 and the correspondence of these codes to the Hubble types are as follows:

      Code: Definition

        -7: Unclassified elliptical
        -6: Compact elliptical
        -5: E, dwarf elliptical
        -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 H II region
        15: Peculiar, unclassifiable
        16: Irr II
        20: S..., Sc-Irr, unclassified spiral

Bar_Type
The numerically coded, revised Hubble (bar) Type of the galaxy. Numerically coded Hubble types were introduced in the RC2 and the correspondence of these codes to the Hubble types are as follows:

      Code: Definition

         A: A, unbarred
         X: X, AB, mixed type
         B: B, barred

Peculiar_Type
The numerically coded, revised Hubble (peculiarity) Type of the galaxy. Numerically coded Hubble types were introduced in the RC2 and the correspondence of these codes to the Hubble types are as follows:

      Code: Definition

         P: Peculiar
         S: No inner ring
         R: Ringed (outer)
         U: Unclassifiable
         T: Pseudo inner ring
         D: Double or multiple

Luminosity_Class
The numerically coded luminosity class of the galaxy, according to the following scheme used for spirals and irregulars:

      Code: Definition

         1: I
         2: I-II
         3: II
         4: II-III
         5: III
         6: III-IV
         7: IV
         8: IV-V
         9: V

Major_Axis
The major axis diameter of the galaxy, in arcminutes.

Minor_Axis
The minor axis diameter of the galaxy, in arcminutes.

UGC_Number
The UGC number of the galaxy.

UGC_Multiplicity
The multiplicity index for the UGC equivalent.

Notes
This parameter includes comments, notes, and references to other catalogs, Note that there are 9 objects included in this table which are misclassified galaxies that were originally listed in table 4 of the published paper: 20372+2704A, 20372+2704B, 20393+0525, 21256+0823, 21296+3418, 21298+2955, 21478+3443, 22341+7523 and 23061+4638. Discrepant velocities are listed here along with the reference to their source. These entries look like "nnnn mm (xxx)", where nnnn is the velocity, mm is the quoted error (if any) and xxx is the source of the discrepant velocity. Additional notes are available in the Table 3 of the published paper, and are also available in the file https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/121/287/notes.dat.gz Other object designations given here include:

        HCG = Hickson compact group,
         MK = Markarian,
        KDG = Karachentsev double galaxy,
         VV = Vorontosov-Velyaminov interacting galaxy,
         AK = Arakelian high surface brightness galaxy,
         Zw = Zwicky compact or peculiar galaxy,
       EMSS = Einstein Medium Sensitivity Survey,
        Kaz = Kazarian galaxy, etc.

Class
The HEASARC Browse object classification, based on the values of the morph_type and bar_type parameters.

Contact Person

Questions regarding the CFA2S database table can be addressed to the HEASARC Help Desk.

Page Author: Browse Software Development Team
Last Modified: Friday, 08-Nov-2024 14:52:03 EST