J/ApJ/765/62 SDSS-DR7 optical spectra analysis of radio galaxies (Sikora+, 2013)
Constraining jet production scenarios by studies of narrow-line radio galaxies.
Sikora M., Stasinska G., Koziel-Wierzbowska D., Madejski G.M., Asari N.V.
<Astrophys. J., 765, 62 (2013)>
=2013ApJ...765...62S 2013ApJ...765...62S
ADC_Keywords: Galaxies, radio ; Redshifts ; Spectroscopy ; Cross identifications
Keywords: accretion, accretion disks; galaxies: jets; magnetic fields
Abstract:
We study a large sample of narrow-line radio galaxies (NLRGs) with
extended radio structures. Using 1.4GHz radio luminosities L1.4,
narrow optical emission line luminosities L[OIII] and LHalpha, as
well as black hole masses MBH derived from stellar velocity
dispersions measured from the optical spectra obtained with the Sloan
Digital Sky Survey, we find that (1) NLRGs cover about four decades of
the Eddington ratio, λ≡Lbol/LEdd∝Lline/MBH;
(2) L1.4/MBH strongly correlates with λ; and (3) radio
loudness, R=L1.4/LLine, strongly anti-correlates with λ. A
very broad range of the Eddington ratio indicates that the parent
population of NLRGs includes both radio-loud quasars (RLQs) and
broad-line radio galaxies (BLRGs). The correlations they obey and
their high jet production efficiencies favor a jet production model
which involves the so-called magnetically choked accretion scenario.
In this model, production of the jet is dominated by the
Blandford-Znajek mechanism, and the magnetic fields in the vicinity of
the central black hole are confined by the ram pressure of the
accretion flow. Since large net magnetic flux accumulated in central
regions of the accretion flow required by the model can take place
only via geometrically thick accretion, we speculate that the massive,
"cold" accretion events associated with luminous emission-line active
galactic nucleus can be accompanied by an efficient jet production
only if preceded by a hot, very sub-Eddington accretion phase.
Description:
To select our sample, we proceeded in a manner analogous to that
described in Koziel-Wierzbowska & Stasinska, 2011, Cat. J/MNRAS/415/1013.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 404 Radio and optical properties of the sample of
radio galaxies
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See also:
VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VIII/84 : A final non-redundant catalogue for 7C 151-MHz survey (Hales+ 2007)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/31 : Revised source list for the Rees 38-MHz survey (Hales+ 1995)
VIII/25 : 6C Survey of radio sources - VI. (Hales+ 1993)
VIII/30 : 5C14/5C15/5C16 Radio Survey at 408 and 1407 MHz (Benn+ 1991)
VIII/18 : 6C Survey of radio sources I. (Baldwin+ 1985)
VIII/4 : Fourth Cambridge Survey (4C) (Pilkington+ 1965; Gower+ 1967)
VIII/1 : The 3C and 3CR Catalogues (Edge+ 1959-1962)
J/ApJ/756/116 : FR II radio galaxies from MaxBCG (Antognini+, 2012)
J/A+A/544/A18 : Radio galaxies of the local universe (van Velzen+, 2012)
J/MNRAS/415/1013 : FR II radio galaxies in SDSS (Koziel-Wierzbowska+, 2011)
J/ApJ/723/1119 : Optical properties of radio galaxies at z<0.3 (Lin+, 2010)
J/ApJ/658/815 : Radio loudness of active galactic nuclei (Sikora+, 2007)
J/AJ/131/666 : Double-lobed radio quasars from the SDSS (de Vries+, 2006)
J/AJ/130/1977 : FIRST-Opt-VLA survey for lensed radio lobes (Haarsma+, 2005)
J/MNRAS/342/915 : 9C survey at 15GHz (Waldram+, 2003)
J/ApJ/448/521 : Radio powers in radio galaxies (Zirbel+, 1995)
J/MNRAS/272/699 : The 5C13 deep radio survey (Benn+, 1995)
J/MNRAS/200/747 : 5C12: survey near the North Galactic Pole (Benn+, 1982)
J/MNRAS/182/273 : The 5C6 and 5C7 surveys of radio sources. (Pearson, 1978)
J/MNRAS/171/475 : The 5C5 survey of radio sources. (Pearson, 1975)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- SDSS SDSS identifier (Plate.MJD.Fiber)
16- 34 A19 --- ID Cambridge Catalog (3C, 4C, ...) identifier
36- 41 F6.4 --- z [0.007/0.4] SDSS-DR7 redshift
43- 51 A9 --- RType Radio type (1)
53- 57 F5.2 [W/Hz] logL1.4 [23.5/27.2] Log of 1.4GHz luminosity from
NVSS (see section 2.2)
59- 63 F5.3 [Lsun] logLHa [0/9.3] Log of Hα luminosity
65- 69 F5.3 [Lsun] logLO3 [0/9.7] Log of [OIII] line luminosity
71- 74 F4.2 [Msun] logMBH [5.9/9.5] Log of Black Hole mass
76- 82 F7.2 arcsec ASize [9/2334] Angular size determined from FIRST
or NVSS otherwise
84- 90 F7.2 kpc LSize [6/2110] Lobe size
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Note (1): Radio types (see section 2.1 for further explanations):
DDRG = Double-Double Radio Galaxy where two pairs of coaxial lobes are
detected.
FRI = Fanaroff-Riley type I. FRI type radio sources, considered as those
where the maximum brightness of the lobes is closer to the center
than to the extremity.
FRI/II = one lobe is of FRI type and the other of FRII type.
FRII = Fanaroff-Riley type II (Fanaroff & Riley 1974MNRAS.167P..31F 1974MNRAS.167P..31F).
FRII type, where the maximum brightness of the lobes is closer to
the extremity.
One-sided = showing only one lobe
X-shaped = two pairs of lobes forming an X-shape structure.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 30-Oct-2014