J/AJ/129/1832 Photometry in the NGC 4756 group of galaxies (Grutzbauch+, 2005)
Small-scale systems of galaxies.
II. Properties of the NGC 4756 group of galaxies.
Grutzbauch R., Kelm B., Focardi P., Trinchieri G., Rampazzo R.,
Zeilinger W.W.
<Astron. J., 129, 1832-1848 (2005)>
=2005AJ....129.1832G 2005AJ....129.1832G
ADC_Keywords: Galaxies, photometry ; Radial velocities
Keywords: distances and redshifts - galaxies: interactions -
galaxies: photometry - techniques: spectroscopic
Abstract:
This paper is part of a series that focuses on investigating galaxy
formation and evolution in small-scale systems of galaxies in
low-density environments. We present results from a study of the NGC
4756 group, which is dominated by the elliptical galaxy NGC 4756. The
characteristics of the group are investigated through (1) the detailed
investigation of the morphological, photometric, and spectroscopic
properties of nine galaxies among the dominant members of the group;
(2) the determination of the photometric parameters of the faint
galaxy population in an area of 34'x34' centered on NGC 4756; and (3)
an analysis of the X-ray emission in the area based on archival data.
The nine member galaxies are located in the core part of the NGC 4756
group (a strip∼300kpc in diameter, H0=70km/s/Mpc), which has a very
loose configuration. The central part of the NGC 4756 group contains a
significant fraction of early-type galaxies.
Description:
The observations were carried out at the ESO 3.6m telescope equipped
with the multipurpose instrument EFOSC2 in the period 2000 May 5-7.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 63 15 Bright group member candidates
table7.dat 64 100 Faint group member candidates
table8.dat 79 13 Additional group member candidates not included
in our sample
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See also:
J/AJ/95/284 : Radial velocities in 14 rich clusters (Dressler+ 1988)
J/A+AS/100/47 : Lyon Groups of Galaxies (Garcia 1993)
Byte-by-byte Description of file: table6.dat table7.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- [GKF2005] SExtractor object identification
7- 8 I2 h RAh Hour of Right Ascension (J2000)
10- 11 I2 min RAm Minute of Right Ascension (J2000)
13- 16 F4.1 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- Sign of the Declination (J2000)
19- 20 I2 deg DEd Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30- 33 F4.2 --- S/G SExtractor star-galaxy separator
(star if parameter greater than 0.5)
35- 39 F5.2 mag Vmag The V band magnitude
41- 45 F5.2 mag/arcsec2 mu0 Central V band surface brightness
47- 52 F6.4 --- n Sersic index
54- 57 F4.1 arcsec Reff Effective radius
59- 63 F5.2 mag/arcsec2 mue Effective V band surface brightness
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Object name
14- 15 I2 h RAh Hour of Right Ascension (J2000.0)
17- 18 I2 min RAm Minute of Right Ascension (J2000.0)
20- 23 F4.1 s RAs Second of Right Ascension (J2000.0)
25 A1 --- DE- Sign of the Declination (J2000.0)
26- 27 I2 deg DEd Degree of Declination (J2000.0)
29- 30 I2 arcmin DEm Arcminute of Declination (J2000.0)
32- 33 I2 arcsec DEs Arcsecond of Declination (J2000.0)
35- 49 A15 --- MType Morphological type
51- 55 F5.2 mag Bmag B band magnitude
57- 60 I4 km/s cz Radial velocity
63- 64 I2 km/s e_cz Error in cz
66- 69 I4 kpc D Projected distance from NGC 4756
71- 79 A9 --- Notes Notes (1)
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Note (1): DS: Galaxy identification from Dressler & Shectman (1988, Cat.
J/AJ/95/284); G: Group members of LGG 306 according to Garcia (1993,
Cat. J/A+AS/100/47)
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History:
From electronic version of the journal
References:
Tanvuia et al., Paper I 2003AJ....126.1245T 2003AJ....126.1245T
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 07-Feb-2006