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J/A+A/335/912 Seyferts in galaxy pairs and groups (Kelm+ 1998)
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Seyfert galaxies and environment: Seyferts in galaxy pairs and groups
Kelm B., Focardi P., Palumbo G.G.C.
<Astron. Astrophys. 335, 912 (1998)>
=1998A&A...335..912K (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies, Seyfert
Keywords: galaxies: interactions - galaxies: Seyfert
Abstract:
The occurrence of Seyfert galaxies in 6 samples representative of
different cosmological environments (i.e. isolated pairs, compact and
loose groups) is analysed. To avoid biases linked to subjective sample
selection criteria only canonical samples, taken from the literature,
are considered. It is found that the average frequency of Seyferts in
all samples, is near 2%. Most Seyferts lying in pairs and compact
groups show disturbed morphological appearance, whilst in loose groups
disturbed and ``isolated'' Seyferts have roughly the same proportion.
Then, within each sample, structures which host a Seyfert are compared
to structures which do not. No appreciable differences regarding
dynamical properties are found.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables.dat 73 130 Seyferts in different samples
tables.ps 72 692 Postscript version of the tables
tables.tex 78 290 LaTeX version of the tables
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See also:
VII/82 : Catalogue of isolated galaxies
J/other/ApL/30.1 : Southern cat. of isolated pairs extension (Reduzzi+ 1995)
Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1 I1 --- Table [1/6] Table number (1)
3- 14 A12 --- Gal Galaxy Identificator
17- 18 A2 --- Type Seyfert type (2)
20- 21 I2 h RAh Right ascension (1950)
23- 24 I2 min RAm Right ascension (1950)
26- 27 I2 s RAs Right ascension (1950)
29 A1 --- DE- Declination sign
30- 31 I2 deg DEd Declination (1950)
33- 34 I2 arcmin DEm Declination (1950)
36- 37 I2 arcsec DEs Declination (1950)
39- 66 A28 --- Pair/group Group and/or Pair Identificator and, within
parenthesis, number of galaxies belonging
to the group. (3)
68 A1 --- pec [YN] Morphological peculiar appearance (4)
70- 73 A4 --- Ncomp Number of Seyfert close companions
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Note (1): 1: Seyferts in Karachentsev's (Cat. <VII/82>) isolated pairs
2: Seyferts in Reduzzi & Rampazzo's (1995ApL....30....1R)
isolated pairs
3: Seyferts in Hickson's (1993ApL....29....1H) compact groups
4: Seyferts in Ramella, Huchra & Geller's (1989ApJ...344...57R) groups
5: Seyferts in Maia, Da Costa & Latham's (1989ApJS...69..809M) groups
6: Seyferts in Garcia's (1993Thesi.........G) groups
Note (2): Seyfert type is from Veron & Veron (1996, Cat. <VII/207>) catalog
Note (3): Identification and number as from the original reference.
Note (4): Morphological peculiarity has been derived via visual inspection of
DSS and (in a few cases) of CCD R images taken at
Loiano 152cm telescope.
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Acknowledgements: P. Focardi <PFOCARDI@astbo4.bo.astro.it>
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(End) Patricia Bauer [CDS] 29-Jun-1998