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J/AJ/126/1750       Seyfert population in SSRS2              (Maia+, 2003)

The Seyfert population in the local universe. Maia M.A.G., Machado R.S., Willmer C.N.A. <Astron. J. 126, 1750 (2003)> =2003AJ....126.1750M
ADC_Keywords: Galaxies, Seyfert ; Active gal. nuclei ; Radial velocities ; Morphology Keywords: galaxies: Seyfert Abstract: The magnitude-limited catalog of the Southern Sky Redshift Survey (SSRS2, Cat. J/AJ/116/1) is used to characterize the properties of galaxies hosting active galactic nuclei (AGNs). Using emission-line ratios, we identify a total of 162 (3%) Seyfert galaxies out of the parent sample with 5399 galaxies. The sample contains 121 Seyfert 2 galaxies and 41 Seyfert 1 galaxies. The SSRS2 Seyfert galaxies are predominantly in spirals of types Sb and earlier or in galaxies with perturbed appearance as the result of strong interactions or mergers. Seyfert galaxies in this sample are twice as common in barred hosts as the non-Seyfert galaxies. By assigning galaxies to groups using a percolation algorithm, we find that the Seyfert galaxies in the SSRS2 are more likely to be found in binary systems when compared with galaxies in the SSRS2 parent sample. However, there is no statistically significant difference between the Seyfert and SSRS2 parent sample when systems with more than two galaxies are considered. The analysis of the present sample suggests that there is a stronger correlation between the presence of the AGN phenomenon with internal properties of galaxies (morphology, presence of bar, luminosity) than with environmental effects (local galaxy density, group velocity dispersion, nearest neighbor distance). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 67 162 SSRS2 Seyfert Galaxies
See also: J/AJ/116/1 : Southern Sky Redshift Survey, SSRS2 (Da Costa+, 1998) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Hour of right ascension (J2000) 4- 5 I2 min RAm Minute of right ascension (J2000) 7- 10 F4.1 s RAs Second of right ascension (J2000) 12 A1 --- DE- Sign of the declination (J2000) 13- 14 I2 deg DEd Degree of declination (J2000) 16- 17 I2 arcmin DEm Arcminute of declination (J2000) 19- 20 I2 arcsec DEs Arcsecond of declination (J2000) 22- 41 A20 --- ID Object identification 43- 47 F5.2 mag SSRSmag Southern Sky Redshift Survey apparent magnitude (1) 49- 53 I5 km/s HRV Heliocentric radial velocity 55- 56 I2 --- MType Morphological type 58 A1 --- Bar Presence of a bar 60- 63 F4.2 --- b/a Axial ratio 65- 66 A2 --- Sey Seyfert type
Note (1): Derived from the HST Guide Star Catalog (Lasker et al., 1990. Cat. I/220) and refers to the galaxy as a whole, there being no decomposition between the contribution from the host galaxy and the AGN.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 21-Nov-2003
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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