J/AJ/107/1629 Hercules region galaxies structures (Tarenghi+, 1994)
Galaxy structures in the Hercules region
TARENGHI M., GARILLI B., MACCAGNI D.
<Astron. J. 107, 1629 (1994)>
=1994AJ....107.1629T 1994AJ....107.1629T (SIMBAD/NED Reference)
Abstract:
216 redshifts have been obtained in a region of 981deg2 south of
the Hercules supercluster. 172 of these redshifts are of galaxies with
mpg≤15.1, 110 of which had no previous velocity measurement. 44 new
redshifts are of galaxies fainter than mpg=15.1. With these new data
we have been able to define a sample in a vast region (∼1700deg2)
around Hercules limited to mpg≤15.1 with a velocity completeness of
81.5%. 189 galaxies have been morphologically classified so that all
galaxies in the sample with known velocity now also have known
morphology. The magnitude limited sample, including 556 galaxies, is
then used to identify and describe galaxy structures in the region. We
find that the overdense volume is small, that its overall appearance is
that of "a coral branch floating in a sea of nothing" and that early
and late type galaxies define different structures.
Description:
table1 lists all the galaxies with Zwicky magnitude brighter than 15.1
either included in the CGCG (Zwicky et al. 1960; Zwicky & Herzog 1963, 1966)
or in the 1990 public version of ZCAT and lying in the area delimited by
(RA=14h40m, Dec=-3d), (RA=14h40m, Dec=39d), (RA=16h40m, Dec=39d),
(RA=16h40m, Dec=15d), (RA=18h18m, Dec=15d) and (RA=18h18m, Dec=-3d).
For the sake of completeness and in order that information can be
disseminated, table2 lists all galaxies with either unpublished
velocities (44) or morphologies, or for which there is an estimate
of the magnitude.
Addresses:
Tarenghi M.
Garilli B.
Maccagni D.
European Southern Observatory, Garching, Germany
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 556 Magnitudes, velocities and morphological
classifications of galaxies with mpg ≤ 15.1
table2.dat 77 139 Magnitudes, velocities and morphological
classifications of galaxies with mpg > 15.1
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Byte-per-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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2- 3 I2 h RAh Right Ascension 1950.0
5- 6 I2 min RAm Right Ascension 1950.0
8- 9 I2 s RAs Right Ascension 1950.0
11 A1 --- DE- Declination sign
12- 13 I2 deg DEd Declination 1950.0
15- 16 I2 arcmin DEm Declination 1950.0
18- 19 I2 arcsec DEs Declination 1950.0
22- 27 I6 --- CGCG ? Zwicky name
29- 37 A9 --- Name Other name
38 A1 --- l_Vmag limit flag on V
39- 42 F4.1 mag Vmag Apparent magnitude
44 A1 --- n_Vmag [ *] Magnitude note (1)
46- 50 I5 km/s Vel ? Heliocentric velocity
52 A1 --- n_Vel [ *] Velocity note (2)
54- 61 A8 --- Type Morphological classification
62 A1 --- n_Type [ *] Morphology note (3)
64- 77 A14 --- Comment General comment about the galaxy
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Note (1): An asterisk denotes eye estimates for those galaxies not in the CGCG
and for the members of double and multiple systems. The eye estimates
were obtained by comparison with a certain number (about a dozen) of
Zwicky galaxies in the same field on the blue glass copies of the
Palomar Observatory Sky Survey (POSS), and they should be within
0.1mag of CGCG measurements.
Note (2): One of 110 new velocities obtained by M. Tarenghi in the early
eighties.
Note (3): Whenever the morphology was not available in the literature,
B. Garilli and D. Maccagni independently classified the galaxies by
inspecting the blue glass copies of the POSS.
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References:
Zwicky, F., Herzog, E., & Wild, P. 1960, Catalog of Galaxies and of Clusters
of Galaxies (Vol. 1) (California Institute of Technology, Pasadena) (CGCG)
Zwicky, F., & Herzog, E. 1963, Catalog of Galaxies and of Clusters of
Galaxies (Vol. 2) (California Institute of Technology, Pasadena) (CGCG)
Zwicky, F., & Herzog, E. 1966, Catalog of Galaxies and of Clusters of
Galaxies (Vol. 3) (California Institute of Technology, Pasadena) (CGCG)
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Origin: AAS CD-ROM series, Volume 2, 1994
(End) Lee Brotzman [ADS] 08-May-1994, Patricia Bauer [CDS] 24-Oct-1994