J/MNRAS/471/28 AGN feedback (Kalfountzou+, 2017)
Observational evidence that positive and negative AGN feedback depends on
galaxy mass and jet power.
Kalfountzou E., Stevens J.A., Jarvis M.J., Hardcastle M.J., Wilner D.,
Elvis M., Page M.J., Trichas M., Smith D.J.B.
<Mon. Not. R. Astron. Soc., 471, 28-58 (2017)>
=2017MNRAS.471...28K 2017MNRAS.471...28K (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; QSOs ; Photometry, millimetric/submm
Keywords: galaxies: active - galaxies: jets - quasars: general -
galaxies: evolution - galaxies: star formation - infrared: galaxies
Abstract:
Several studies support the existence of a link between the active
galactic nucleus (AGN) and star formation activity. Radio jets have
been argued to be an ideal mechanism for direct interaction between
the AGN and the host galaxy. A drawback of previous surveys of AGN is
that they are fundamentally limited by the degeneracy between redshift
and luminosity in flux-density limited samples. To overcome this
limitation, we present far-infrared Herschel observations of 74
radio-loud quasars (RLQs), 72 radio-quiet quasars (RQQs) and 27 radio
galaxies (RGs), selected at 0.9<z<1.1, which span over two decades
in optical luminosity. By decoupling luminosity from evolutionary
effects, we investigate how the star formation rate (SFR) depends on
AGN luminosity, radio-loudness and orientation. We find that (1) the
SFR shows a weak correlation with the bolometric luminosity for all
AGN sub-samples, (2) the RLQs show an SFR excess of about a factor of
1.4 compared to the RQQs, matched in terms of black hole mass and
bolometric luminosity, suggesting that either positive radio-jet
feedback or radio AGN triggering is linked to star formation
triggering, and (3) RGs have lower SFRs by a factor of 2.5 than the
RLQ sub-sample with the same BH mass and bolometric luminosity. We
suggest that there is some jet power threshold at which radio-jet
feedback switches from enhancing star formation (by compressing gas)
to suppressing it (by ejecting gas). This threshold depends on both
galaxy mass and jet power.
Description:
The data presented in this paper consist of Herschel-PACS and SPIRE
images of 173 AGNs, along with millimetre images taken at 1300um with
SMA for the RLQs. The sample is split into three sub-samples, all at
the single cosmic epoch of 0.9<z<1.1: 74 RLQs, 72 RQQs and 27 RGs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 140 173 Herschel photometry of the objects studied in
this work
tablea2.dat 80 173 Properties of the z~=1 AGN sample
tablea3.dat 73 54 *SMA observations of the 44 RLQs candidates for
synchrotron contamination
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Note on tablea3.dat: Note that for seven sources there are multiple observations
due to the poor weather conditions.
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See also:
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Name Name
25- 35 F11.7 deg RAdeg Right ascension (J2000)
36- 43 F8.5 deg DEdeg Declination (J2000)
45- 47 A3 --- Type Type classification (G1)
49- 53 F5.3 --- z Redshift
55- 64 A10 --- PACS PACS ID or field
66 A1 -- l_S70um Limit flag on S70um
67- 72 F6.2 mJy S70um ? Herschel/PACS 70um flux
74- 77 F4.2 mJy e_S70um ? rms uncertainty on S70um (1σ value)
79 A1 --- l_S160um Limit flag on S160um
80- 85 F6.2 mJy S160um ? Herschel/PACS 160um flux
87- 90 F4.2 mJy e_S160um ? rms uncertainty on S160um (1σ value)
92-101 A10 --- SPIRE SPIRE ID or field
102 A1 --- n_SPIRE [abcd] Note no SPIRE (2)
103-108 F6.2 mJy S250um ?=-99 Herschel/SPIRE 250um flux
110-115 F6.3 mJy e_S250um ? rms uncertainty on S250um (1σ value)
116-121 F6.2 mJy S350um ?=-99 Herschel/SPIRE 350um flux
123-127 F5.2 mJy e_S350um ? rms uncertainty on S350um (1σ value)
129-134 F6.2 mJy S500um ?=-99 Herschel/SPIRE 500um flux
136-140 F5.2 mJy e_S500um ? rms uncertainty on S500um (1σ value)
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Note (2): Notes as follows:
a = Source overlaps with HerMES Lockman-SWIRE field
b = Source overlaps with Herschel-ATLAS fields
c = Source overlaps with HerMES FLS field
d = Source overlaps with HerMES ELAIS-N2-SWIRE field
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Name Name
23- 25 A3 --- Type Type classification (G1)
27- 31 F5.3 --- z Redshift
33- 38 F6.3 [10-7W] logLBol Logarithmic bolometric luminosity
40- 44 F5.3 [10-7W] e_logLBol Logarithmic bolometric luminosity
1σ error
46- 52 F7.4 [W/Hz/sr] Lradb Logarithmic 325MHz radio luminosity
54 A1 --- Cont [NY?] Synchrotron contamination at the
FIR bands
56- 60 F5.3 [Msun] logMBH Logarithmic black hole mass
62- 66 F5.3 [Msun] e_logMBH Logarithmic black hole mass 1σ error
68 A1 --- l_logLFIR [-] Limit flag on logLFIR
69- 74 F6.3 [10-7W] logLFIR Logarithmic FIR luminosity
76- 80 F5.3 [10-7W] e_logLFIR Logarithmic FIR luminosity 1σ error
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- Name Name
23- 26 F4.2 --- tau Atmospheric opacity or
lower value of atmospheric opacity interval
27 A1 --- --- [-]
28- 30 F3.1 --- tau2 ? Upper value of atmospheric opacity interval
32- 41 A10 "date" Obs.Date Observation date
43- 49 F7.3 GHz Freq Observed frequency
51 I1 --- N Number of antennas
53- 62 A10 mJy lS1300um 4σ upper limit for 1300um flux
63- 68 F6.2 mJy S1300um ? 1300um flux
70- 73 F4.2 mJy e_S1300um ? rms uncertainty on S1300um
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Global notes:
Note (G1): Type as follows:
RG = radio galaxy
RLQ = radio-loud quasars
RQQ = radio-quiet quasars
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-May-2020