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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 (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 For the sake of completeness and in order that information can be disseminated, table2 lists all galaxies with either unpublished velocities (44) or morphologies, or for which there is an estimate of the magnitude.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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 77 556 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
Byte-by-byte Description of file: table1.dat table2.dat
Bytes Format Units Label Explanations
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
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.
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) Origin: AAS CD-ROM series, Volume 2, 1994
(End) Lee Brotzman [ADS] 08-May-1994, Patricia Bauer [CDS] 24-Oct-1994
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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