J/ApJ/599/886 Emission lines of radio-loud AGN (Eracleous+, 2003)
Completion of a survey and detailed study of double-peaked emission lines
in radio-loud active galactic nuclei.
Eracleous M., Halpern J.P.
<Astrophys. J., 599, 886-908 (2003)>
=2003ApJ...599..886E 2003ApJ...599..886E
ADC_Keywords: Active gal. nuclei ; Galaxies, spectra
Keywords: galaxies: active - galaxies: nuclei
Abstract:
We report the completion of a survey of radio-loud active galactic
nuclei (AGNs) begun in an earlier paper (Eracleous & Halpern,
1994ApJS...90....1E 1994ApJS...90....1E) with the main goal of finding and studying broad,
double-peaked Balmer lines. We present Hα spectra of 13 more
broad-lined objects, including three with double-peaked Hα
profiles. The final sample includes 106 radio-loud AGNs. In our final
census 20% of objects have Hα lines with double peaks or twin
shoulders (the "double-peaked emitters"), and of these 60% (the
disklike emitters) can be fitted quite well with a model attributing
the emission to a circular, relativistic, Keplerian disk. In four
objects where broad Hβ and Mg II lines have been observed, we
compare the profiles with models of photoionized accretion disks and
find them to be in reasonable agreement.
Description:
The observations presented here were carried out over several
observing runs using four different telescopes and spectrographs,
namely, the 4m telescope and Ritchie-Chretien (RC) spectrograph and
the 2.1m telescope and GoldCam spectrograph at Kitt Peak National
Observatory, the 4m telescope and RC spectrograph at Cerro Tololo
Inter-American Observatory, the 3m Shane telescope and Kast double
spectrograph at Lick Observatory, and the 2.4m telescope at MDM
observatory. Most observations were carried out between 1993 and 1995,
and a small number of them were carried out between 1997 and 2000.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table5.dat 54 96 Emission-Line Ratios
refs.dat 80 16 References
--------------------------------------------------------------------------------
See also:
J/ApJS/150/181 : Redshifts of 110 radio-loud AGN (Eracleous+, 2004)
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- AType AGN type (3)
5- 20 A16 --- Name AGN name (1)
22- 26 F5.3 --- OI/OIII ? Narrow line [O I] (6300)/[O III] (5007) ratio
28- 32 F5.3 --- OII/OIII ? Narrow line [O II] (3727)/[O III] (5007) ratio
34- 37 F4.2 --- Ha/Hb ? Broad line Hα/Hβ ratio
39 A1 --- f_Ha/Hb [cd] Flag on Ha/Hb (2)
41- 44 F4.2 --- MgII/Hb ? Broad line Mg II (2800)/Hβ ratio
46 A1 --- f_MgII/Hb [cd] Flag on MgII/Hb (2)
48- 54 A7 --- Ref References, in refs.dat file
--------------------------------------------------------------------------------
Note (1): All objects have redshifts less than 0.6.
Line ratios have been corrected for Galactic reddening using the
Seaton (1979MNRAS.187p..73S 1979MNRAS.187p..73S) law and the color excess reported by
Schlegel et al. (1998ApJ...500..525S 1998ApJ...500..525S). Uncertainties on line ratios
from this work and from paper I are typically 20%.
Note (2): Flags:
c = The Ha/Hb and MgII/Hb ratios of 3C 17 are fairly uncertain
because of the weakness of Hβ. The Ha/MgII ratio, however,
is not as uncertain; its value is 5.36.
d = The reported line ratio refers to the total flux of the broad and
narrow lines combined.
Note (3): the type is either "DPE" = Double-Peaked Emitter, or
blank for other Radio-Loud AGNs.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 43 A20 --- Aut Author's name
47- 80 A34 --- Com Comments
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2004