J/other/AstBu/71.270 The UGC isolated galaxy pair catalog (Chamaraux+, 2016)
A catalog of isolated galaxy pairs with accurate radial velocities.
Chamaraux P., Nottale L.
<Astrophys. Bull., 71, 270 (2016)>
=2016AstBu..71..270C 2016AstBu..71..270C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Clusters, galaxy ; Radial velocities
Keywords: catalogues - galaxies: general - galaxies: groups: general
Abstract:
The present paper is devoted to the construction of a catalog of
isolated galaxy pairs from the Uppsala Galaxy Catalog (UGC), using
accurate radial velocities. The UGC lists 12 921 galaxies to
δ>-2:30 and is complete to an apparent diameter of 1{arcmin}.
The criteria used to define the isolated galaxy pairs are based on
velocity, interdistance, reciprocity and isolation information. A
peculiar investigation has allowed to gather very accurate radial
velocities for pair members, from high quality HI and optical
measurements (median uncertainty on velocity differences 10km/s). Our
final catalog contains 1005 galaxy pairs with ρ>2.5, of which 509
have ρ>5 (50% of the pairs, i.e. 8% of the UGC galaxies) and 273
are highly isolated with ρ>10 (27% of the pairs, i.e. 4% of the
UGC galaxies). Some global properties of the pair catalog are given.
Description:
We present a catalog of 1005 isolated pairs of galaxies selected from
UGC catalog with very accurate radial velocities measurements.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 51 1005 The UGC isolated galaxy pair catalog
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See also:
VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- UGC1 UGC number of the first pair member
7- 11 I5 --- UGC2 UGC number of the second pair member
13- 17 I5 km/s RV1 [-82/16463] Radial velocity relative to the Sun
of the first member
19- 20 I2 km/s e_RV1 [1/94] Uncertainty of RV1
22- 26 I5 km/s RV2 [-207/16279] Radial velocity relative to the Sun
of the second member
28- 30 I3 km/s e_RV2 [1/122] Uncertainty of RV2
32- 34 I3 km/s dRV [0/593] Absolute value of the radial velocity
difference between the pair members
36- 40 F5.1 km/s e_dRV [1.4/132.9] Uncertainty of dRV
42- 46 F5.3 Mpc Sep [0.002/0.991] Projected distance on the sky
between two pair members
48- 51 F4.1 --- rho 2.5/10.] Ratio between the projected distance
of the nearest UGC galaxy to the center
of the pair and Sep (1)
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Note (1): A value 10. in the table means that ρ≥10.
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Acknowledgements:
P. Chamaraux, pierre.chamaraux(at)obspm.fr
L. Nottale, laurent.nottale(at)obspm.fr
(End) Ilya Yakunin [Astrophysical Bulletin], Patricia Vannier [CDS] 20-Aug-2016