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J/AJ/127/1883       Merging galaxies in SDSS EDR             (Allam+, 2004)

Merging galaxies in the Sloan Digital Sky Survey Early Data Release. Allam S.S., Tucker D.L., Smith J.A., Lee B.C., Annis J., Lin H., Karachentsev I.D., Laubscher B.E. <Astron. J., 127, 1883-1899 (2004)> =2004AJ....127.1883A
ADC_Keywords: Surveys ; Galaxies, photometry ; Photometry, SDSS Keywords: atlases - catalogs - galaxies: interactions - surveys Abstract: We present a new catalog of merging galaxies obtained through an automated systematic search routine. The 1479 new pairs of merging galaxies were found in ∼462 square degrees of the Sloan Digital Sky Survey Early Data Release (SDSS EDR, Cat. J/AJ/123/567) photometric data, and the pair catalog is complete for galaxies in the magnitude range 16.0≤g*≤20. The selection algorithm, implementing a variation on the original Karachentsev criteria, proved to be very efficient and fast. Merging galaxies were selected such that the intergalaxy separations were less than the sum of the component galaxies' radii. We discuss the characteristics of the sample in terms of completeness, pair separation, and the Holmberg effect. We also present an on-line atlas of images for the SDSS EDR pairs obtained using the corrected frames from the SDSS EDR database. The atlas images also include the relevant data for each pair member. This catalog will be useful for conducting studies of the general characteristics of merging galaxies, their environments, and their component galaxies. The redshifts for a subset of the interacting and merging galaxies and the distribution of angular sizes for these systems indicate the SDSS provides a much deeper sample than almost any other wide-area catalog to date. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 141 1479 Properties of the SDSS EDR Merging Pairs Sample
See also: J/AJ/123/567 : SDSS quasar catalog, I: Early Data Release (Schneider+, 2002) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- [ATS2004] Running identification number 6- 7 I2 h RAh Pair's hour of right ascension (J2000) 9- 10 I2 min RAm Pair's minute of right ascension (J2000) 12- 16 F5.2 s RAs Pair's second of right ascension (J2000) 18 A1 --- DE- Sign of the pair's declination (J2000) 19- 20 I2 deg DEd Pair's degree of declination (J2000) 22- 23 I2 arcmin DEm Pair's arcminute of declination (J2000) 25- 29 F5.2 arcsec DEs Pair's arcsecond of declination (J2000) 31- 36 F6.3 mag u*mag Pair's total SDSS Petrosian u* band magnitude 38- 43 F6.3 mag g*mag Pair's total SDSS Petrosian g* band magnitude 45- 50 F6.3 mag r*mag Pair's total SDSS Petrosian r* band magnitude 52- 57 F6.3 mag i*mag Pair's total SDSS Petrosian i* band magnitude 59- 64 F6.3 mag z*mag Pair's total SDSS Petrosian z* band magnitude 66- 71 F6.3 arcsec Sep Prejected separation between the pair 73- 76 A4 --- --- [SDSS] 78- 97 A20 --- NameA Brighter pair member SDSS name (1) 99-106 F8.6 --- zA ? Spectroscopic redshift of brighter pair member 108-111 A4 --- --- [SDSS] 113-132 A20 --- NameB Fainter pair member SDSS name (1) 134-141 F8.6 --- zB ? Spectroscopic redshift of fainter pair member
Note (1): In SDSS format.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 06-Jul-2004
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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