J/MNRAS/460/3202 Radio-loud AGN with relativistic jets (Olguin-Iglesias+, 2016)
The host galaxies of active galactic nuclei with powerful relativistic jets.
Olguin-Iglesias A., Leon-Tavares J., Kotilainen J.K., Chavushyan V.,
Tornikoski M., Valtaoja E., Anorve C., Valdes J., Carrasco L.
<Mon. Not. R. Astron. Soc., 460, 3202-3220 (2016)>
=2016MNRAS.460.3202O 2016MNRAS.460.3202O (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Photometry, infrared ; Redshifts
Keywords: galaxies: active - BL Lacertae objects: general -
galaxies: evolution - galaxies: jets
Abstract:
We present deep near-infrared (NIR) images of a sample of 19
intermediate-redshift (0.3<z<1.0) radio-loud active galactic nuclei
(AGN) with powerful relativistic jets (L1.4GHz>1027W/Hz),
previously classified as flat-spectrum radio quasars. We also compile
host galaxy and nuclear magnitudes for blazars from literature. The
combined sample (this work and compilation) contains 100 radio-loud
AGN with host galaxy detections and a broad range of radio
luminosities L1.4GHz∼1023.7-1028.3W/Hz, allowing us to divide
our sample into high-luminosity blazars (HLBs) and low-luminosity
blazars (LLBs). The host galaxies of our sample are bright and seem to
follow the µe-Reff relation for ellipticals and bulges. The two
populations of blazars show different behaviours in the
MK,nuclear-MK,bulge plane, where a statistically significant
correlation is observed for HLBs. Although it may be affected by
selection effects, this correlation suggests a close coupling between
the accretion mode of the central supermassive black hole and its host
galaxy, which could be interpreted in terms of AGN feedback. Our
findings are consistent with semi-analytical models where
low-luminosity AGN emit the bulk of their energy in the form of radio
jets, producing a strong feedback mechanism, and high-luminosity AGN
are affected by galaxy mergers and interactions, which provide a
common supply of cold gas to feed both nuclear activity and star
formation episodes.
Description:
The sample of sources analysed in this work is a sub-sample of
variable radio-loud AGN monitored at 7mm (S7mm>1Jy) with the Aalto
University Metsahovi Radio Observatory, in Finland
(http://metsahovi.aalto.fi/en/) since the last 30 years (Terasranta et
al., 1992A&AS...94..121T 1992A&AS...94..121T; Teraesranta et al., 1998, Cat.
J/A+AS/132/305; Leon-Tavares et al., 2011A&A...532A.146L 2011A&A...532A.146L; Nieppola et
al., 2011, Cat. J/A+A/535/A69). According to the AGN unification
scheme (Antonucci, 1993ARA&A..31..473A 1993ARA&A..31..473A; Urry & Padovani,
1995PASP..107..803U 1995PASP..107..803U), FSRQ and BL Lacs are those AGN whose
relativistic jets point towards the Earth.
Observations were made with the Nordic Optical Telescope (NOT) at La
Roque de los Muchachos, La Palma, Canarias, Spain. They were conducted
between 2011 May 09 and September 15 using the near-infrared Camera
(NOTCam)3 on the NOT. NOTcam field of view is 4'x4' with a pixel scale
of 0.234-arcsec/pixel designed to be used in the range from 0.8 to
2.5um in the bands J, H and K.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 99 100 Best-fitting parameters of the morphological
fittings and general properties of the combined
sample (this work and literature compilation)
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See also:
J/A+AS/132/305 : Extragal. radio sources at 22, 37 and 87GHz (Terasranta+ 1998)
J/A+A/535/A69 : AGN Fermi/LAT γ-ray and 37GHz fluxes (Nieppola+, 2011)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name (HHMM+DDMM)
10- 14 F5.3 --- z Reported redshift for the source (1)
16- 17 I2 h RAh Right ascension (J2000)
19- 20 I2 min RAm Right ascension (J2000)
22- 25 F4.1 s RAs Right ascension (J2000)
27 A1 --- DE- Declination sign (J2000)
28- 29 I2 deg DEd Declination (J2000)
31- 32 I2 arcmin DEm Declination (J2000)
34- 37 F4.1 arcsec DEs Declination (J2000)
39- 43 A5 --- Type Object type (2)
46- 50 F5.2 Jy S1.4GHz 1.4GHz flux density (3)
52- 56 F5.2 [W/Hz] logL1.4GHz Luminosity at 1.4GHz
58 A1 --- Filt [RIJHK] Observed filter
60- 64 F5.2 mag mHost Host apparent magnitudes in the
observed band
66- 70 F5.2 mag mNucl Nuclear apparent magnitudes in the
observed band
72- 77 F6.2 mag MKHost Host absolute magnitudes transformed to
K band assuming the colours in Section 2
79- 84 F6.2 mag MKNuc Nuclear absolute magnitudes transformed
to K band assuming the colours
in Section 2
86- 90 F5.2 kpc Re Effective radius converted to our adopted
cosmology
92- 96 F5.2 mag/arcsec+2 SuBre ? Surface brightness at effective radius
in K band
98- 99 I2 --- Ref References for fitting parameters (4)
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Note (1): BL Lac objects redshifts were derived from weak stellar absorption
features or weak emission lines.
Note (2): Types as follows:
BLLAC = BL Lac type object
FSRQ = Flat Spectrum Radio Quasar
Note (3): 1.4GHz flux density as retrieved from NASA/IPAC Extragalactic Database
(NED);5.http://ned.ipac.caltech.edu/
Note (4): References as follows:
1 = Falomo & Kotilainen (1999A&A...352...85F 1999A&A...352...85F)
2 = Kotilainen et al. (2005A&A...440..831K 2005A&A...440..831K)
3 = Nilsson et al. (2003A&A...400...95N 2003A&A...400...95N)
4 = Kotilainen et al. (1998A&A...332..503K 1998A&A...332..503K)
5 = Urry et al. (2000ApJ...532..816U 2000ApJ...532..816U)
6 = Cheung et al. (2003ApJ...599..155C 2003ApJ...599..155C)
7 = This work
8 = O'Dowd & Urry (2005ApJ...627...97O 2005ApJ...627...97O)
9 = Heidt et al. (2004A&A...418..813H 2004A&A...418..813H)
10 = Nilsson et al. (2009A&A...505..601N 2009A&A...505..601N)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Nov-2017