J/other/RAA/9.269 AGNs in LSB galaxies (Mei+, 2009)
A study of active galactic nuclei in low surface brightness galaxies with
Sloan Digital Sky Survey spectroscopy.
Mei L., Yuan W.-M., Dong X.-B.
<Res. Astron. Astrophys., 9, 269-292 (2009)>
=2009RAA.....9..269M 2009RAA.....9..269M
ADC_Keywords: Active gal. nuclei ; Spectroscopy ; Velocity dispersion
Keywords: galaxies: active - galaxies: fundamental parameters -
galaxies: nuclei
Abstract:
Active galactic nuclei (AGNs) in low surface brightness galaxies
(LSBGs) have received little attention in previous studies. We present
a detailed spectral analysis of 194 LSBGs from the Impey et al. (1996,
Cat. J/ApJS/105/209) APM LSBG sample which has been observed
spectroscopically by the Sloan Digital Sky Survey Data Release 5 (SDSS
DR5). Our elaborate spectral analysis enables us to carry out, for the
first time, reliable spectral classification of nuclear processes in
LSBGs based on the standard emission line diagnostic diagrams in a
rigorous way. Star-forming galaxies are common, as found in about 52%
of LSBGs.We find that, contrary to some previous claims, the fraction
of galaxies that contain AGNs is significantly lower than that found
in nearby normal galaxies of high surface brightness. This is
qualitatively in line with the finding of Impey et al. This result
holds true even within each morphological type from Sa to Sc. LSBGs
that have larger central stellar velocity dispersions or larger
physical sizes tend to have a higher chance of harboring an AGN. For
three AGNs with broad emission lines, the black hole masses estimated
from the emission lines are broadly consistent with the well known
M-σ* relation established for normal galaxies and AGNs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 98 131 Spectral parameters and classification of the
131 emission-line LSBGs
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See also:
J/ApJS/105/209 : Low surface brightness galaxies. I. The catalog (Impey+ 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Name Name (HHMMSS.s+DDMMSS.s)
19- 23 F5.3 --- z Redshift
25- 30 F6.1 10-20W/m2 [OII] ?=- Flux of [OII]3737Å line
32- 37 F6.1 10-20W/m2 Hb Flux of Hβ narrow line
39- 44 F6.1 10-20W/m2 [OIII] Flux of [OIII]5007Å line
46- 50 F5.1 10-20W/m2 [OI] ?=- Flux of [OI]6300Å line
52- 57 F6.1 10-20W/m2 Ha Flux of Hα narrow line
59- 64 F6.1 10-20W/m2 [NII] Flux of [NII]6583Å line
66- 70 F5.1 10-20W/m2 [SII]1 Flux of [SII]6717Å line
72- 76 F5.1 10-20W/m2 [SII]2 Flux of [SII]6731Å line
78- 82 F5.1 km/s W[NII] Full width at half maximum ([NII])
84- 88 F5.1 km/s sigma* ?=- Measured stellar velocity dispersion of
galactic bulge
90- 98 A9 --- Type Classification of emission-line nuclear
based on the narrow line flux ratios
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Sep-2011