Access to Astronomical Catalogues

← Click to display the menu
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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 98 131 Spectral parameters and classification of the 131 emission-line LSBGs
See also: J/ApJS/105/209 : Low surface brightness galaxies. I. The catalog (Impey+ 1996) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Sep-2011
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

catalogue service