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J/AJ/132/321   Morphology of narrow-line Seyfert 1 galaxies  (Deo+, 2006)

The host galaxies of narrow-line Seyfert 1 galaxies: nuclear dust morphology and starburst rings. Deo R.P., Crenshaw D.M., Kraemer S.B. <Astron. J., 132, 321-346 (2006)> =2006AJ....132..321D
ADC_Keywords: Galaxies, Seyfert ; Redshifts ; Morphology Keywords: galaxies: active - galaxies: nuclei - galaxies: Seyfert - galaxies: structure Abstract: We present a study of the nuclear morphology of a sample of narrow- and broad-line Seyfert 1 galaxies (NLS1s and BLS1s, respectively) based on broadband images in the Hubble Space Telescope archives. In our previous study we found that large-scale stellar bars at >1kpc from the nucleus are more common in NLS1s than BLS1s. In this paper we find that NLS1s preferentially have grand-design dust spirals within ∼1kpc of their centers. We also find that NLS1s have a higher fraction of nuclear star-forming rings than BLS1s. We find that many of the morphological differences are due to the presence or absence of a large-scale stellar bar within the spiral host galaxy. In general, barred Seyfert 1 galaxies tend to have grand-design dust spirals at their centers, confirming the results of other researchers. The high fraction of grand-design nuclear dust spirals and stellar nuclear rings observed in NLS1s' host galaxies suggests a means for efficient fueling of their nuclei to support their high Eddington ratios. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 61 91 Nuclear Morphology and Host Galaxy Parameters for Seyfert 1 Galaxies
See also: J/ApJS/141/23 : JHK' imaging photometry of Seyfert 1. I. (Enya+, 2002) J/ApJS/141/31 : JHK' imaging photometry of Seyfert 1. II. (Enya+, 2002) J/AJ/124/3042 : Narrow-line Seyfert 1 galaxies from SDSS EDR (Williams+, 2002) J/AJ/131/1948 : Narrow line Seyfert 1 galaxies in the FBQS (Whalen+, 2006) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Name Source name (1) 17 A1 --- n_Name [a-g] Note on Name (2) 19- 23 F5.3 --- z Redshift (Crenshaw, Kraemer & Gabel, 2003AJ....126.1690C) 25- 28 F4.2 --- b/a The RC3 axial ratio from NED 30- 33 F4.1 --- T Numerical Hubble stage index from NED (3) 35- 40 F6.2 mag BMAG ? Absolute B band magnitude from NED (4) 42- 45 A4 --- SClass Seyfert 1 class 47- 48 A2 --- Morph Large-scale morphology (5) 50- 61 A12 --- N-Morph Nuclear morphology (6)
Note (1): All images except as noted were taken with F606W filter. Note (2): Flags as follows: a = Observed with the F814W filter b = Galaxy positioned in WF2 chip c = Galaxy positioned in WF4 chip d = Not included in Figure2 e = Excluded from analysis, see Section 2.1 f = Other name: NGC4748 g = The MAST fits header entry for this galaxy mentions it as II ZW 10 which is incorrect Note (3): Some values for the Hubble stage T were reassigned using classifications from The de Vaucouleurs Atlas of Galaxies, Buta, Corwin and Odewahn (in preparation). Note (4): Computed from the corrected asymptotic blue magnitude BT0 (corrected for interstellar extinction and the K-correction). We used BT0-BMAG=5log(cz/H0)+25, with H0=71km/s/Mpc (Spergel et al., 2003ApJS..148..175S). Note (5): Large-scale morphology description are: S = spiral SB = barred spiral E = elliptical I = irregular P = point source ? = not classified Note (6): Primary nuclear morphology classes are: ND = no significant dust DS = dust spiral DB = dust bar A = amorphous structures DL = large-scale dust lane NR = Nuclear Ring SBS = Star-burst (nuclear) Spiral Secondary nuclear morphology classes are: GD = grand-design spiral FL = flocculent multi-arm spiral ? = for no secondary classification
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-Sep-2007
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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