J/MNRAS/458/4512 Nearby Seyfert galaxies FIR emissions (Garcia-Gonzalez+, 2016)
The nuclear and integrated far-infrared emission of nearby Seyfert galaxies.
Garcia-Gonzalez J., Alonso-Herrero A., Hernan-Caballero A.,
Pereira-Santaella M., Ramos-Almeida C., Acosta-Pulido J.A., Diaz-Santos T.,
Esquej P., Gonzalez-Martin O., Ichikawa K., Lopez-Rodriguez E., Povic M.,
Roche P.F., Sanchez-Portal M.
<Mon. Not. R. Astron. Soc., 458, 4512-4529 (2016)>
=2016MNRAS.458.4512G 2016MNRAS.458.4512G (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Photometry, infrared ;
Photometry, millimetric/submm
Keywords: galaxies: active - infrared: galaxies
Abstract:
We present far-infrared (FIR) 70-500µm imaging observations
obtained with Herschel/Photodetector Array Camera (PACS) and Spectral
and Photometric Imaging REceiver (SPIRE) of 33 nearby (median distance
of 30Mpc) Seyfert galaxies from the Revised Shapley-Ames (RSA)
catalogue. We obtain the FIR nuclear (r=1kpc and r=2kpc) and
integrated spectral energy distributions (SEDs). We estimate the
unresolved nuclear emission at 70µm and we fit the nuclear and
integrated FIR SEDs with a grey body model. We find that the
integrated FIR emission of the RSA Seyferts in our sample is dominated
by emission from the host galaxy, with dust properties similar to
those of normal galaxies (non-AGN). We use four criteria to select
galaxies whose nuclear 70µm emission has a significant AGN
contribution: (1) elevated 70/160µm flux ratios, (2) spatially
resolved, high dust temperature gradient, (3) 70µm excess emission
with respect to the fit of the FIR SEDs with a grey body, and (4)
excess of nuclear SFR obtained from 70µm over SFR from
mid-infrared indicators. 16 galaxies (48 per cent of the initial
sample) satisfy at least one of these conditions, whereas 10 satisfy
half or more. After careful examination of these, we select six bona
fide candidates (18 per cent of the initial sample) and estimate that
∼40-70 per cent of their nuclear (r=1-2kpc) 70µm emission
is contributed by dust heated by the AGN.
Description:
We selected a sample of 33 nearby (distances DL<70Mpc, Table 1) Seyfert
galaxies from the RSA catalogue (Sandage & Tammann 1987, Cat. VII/51)
with Herschel/PACS imaging observations in at least two bands and
SPIRE imaging observations from our own programmes and from the
archive (see Table 3).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 94 33 Galaxy sample
table3.dat 62 155 Herschel/PACS and SPIRE observing programmes
table5.dat 78 33 Aperture photometry for r=1kpc
table6.dat 90 33 Aperture photometry for r=2kpc
table7.dat 90 33 Integrated photometry
table10.dat 84 33 Results from grey body fits
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq Sequential number
4- 15 A12 --- Name Galaxy name
17- 21 F5.2 Mpc DL Luminosity distance
23- 28 F6.3 mag BTmag BT magnitude from Maiolino & Rieke
(1995ApJ...454...95M 1995ApJ...454...95M)
30- 44 A15 --- MType Morphological type (1)
46- 51 A6 --- AType Activity type
53 A1 --- l_EW6.2 Limit flag on EW6.2
54- 58 F5.3 um EW6.2 ? Equivalent width of 6.2um PAH
60- 64 F5.3 um e_EW6.2 ? rms uncertainty on EW6.2
66- 70 F5.3 um EW11.3 ? Equivalent width of 11.3um PAH
72- 76 F5.3 um e_EW11.3 ? rms uncertainty on EW11.3
78- 81 F4.1 [10-7W] logLbol ? AGN bolometric luminosity from
Diamond-Stanic & Rieke (2012ApJ...746..168)
82 A1 --- r_logLbol [dn] Reference for logLbol (2)
84- 87 F4.2 Msun/yr SFR1 ? Star formation rate at r=1kpc
89- 92 F4.2 Msun/yr SFR2 ? Star formation rate at r=2kpc
94 A1 --- r_AType Reference for Activity type (2)
--------------------------------------------------------------------------------
Note (1): NED Homogenized from de Vaucouleurs et al. (1991, Cat. VII/155).
Note (2): Reference as follows:
d = Esquej et al. (2014ApJ...780...86E 2014ApJ...780...86E)
e = Veron-Cetty & Veron (2006A&A...455..773V 2006A&A...455..773V, Cat. VII/248)
f = Kewley et al. (2001, Cat. J/ApJS/132/37)
g = Contini, Considere & Davoust (1998, Cat. J/A+AS/130/285)
h = Osterbrock & Martel (1993ApJ...414..552O 1993ApJ...414..552O)
i = Reunanen, Kotilainen & Prieto (2002)
j = Brightman & Nandra (2011. Cat. J/MNRAS/413/1206)
k = Bradt et al. (1978ApJ...226L.111B 1978ApJ...226L.111B)
l = Phillips, Charles & Baldwin (1983ApJ...266..485P 1983ApJ...266..485P)
m = Trippe et al. (2010ApJ...725.1749T 2010ApJ...725.1749T)
n = Mason et al. (2012, Cat. J/AJ/144/11)
o = Malizia et al. (2012, Cat. J/MNRAS/426/1750)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Galaxy name
14- 23 I10 --- ObsID Observation ID
24 A1 --- n_ObsID [*] Note on ObsID (1)
26- 30 A5 --- Inst Instrument
32- 44 A13 --- Wave Wavelengths (um)
46- 62 A17 --- PI PI
--------------------------------------------------------------------------------
Note (1): * indicates that this observation is used for the mosaic of 160um
but not for the 100um.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat table6.dat table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Galaxy name
13- 18 F6.2 arcsec Rad Radius
20- 25 F6.2 Jy F70um ? Flux at 70um
27- 31 F5.2 Jy e_F70um ? rms uncertainty on F70um
32- 37 F6.2 Jy F100um ? Flux at 100um
39- 43 F5.2 Jy e_F100um ? rms uncertainty on F100um
46- 50 F5.1 Jy F160um ? Flux at 160um
52- 55 F4.1 Jy e_F160um ? rms uncertainty on F160um
57- 62 F6.2 Jy F250um ? Flux at 250um
64- 68 F5.2 Jy e_F250um ? rms uncertainty on F250um
70- 74 F5.2 Jy F350um ? Flux at 350um
76- 79 F4.2 Jy e_F350um ? rms uncertainty on F350um
81- 85 F5.2 Jy F500um ? Flux at 500um
87- 90 F4.2 Jy e_F500um ? rms uncertainty on F500um
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Name Galaxy name
14- 15 I2 K T1 ?=- Temperature for emission at 1kpc
17 I1 K e_T1 ? rms uncertainty on T1
19- 21 F3.1 --- beta1 ?=- beta index for emission at 1kpc
23- 25 F3.1 --- e_beta1 ? rms uncertainty on beta1
27- 30 F4.2 --- chi21 ?=- chi2 value for emission at 1kpc
32- 33 I2 K T2 ?=- Temperature for emission at 2kpc
35 I1 K e_T2 ? rms uncertainty on T2
37- 39 F3.1 --- beta2 ?=- beta index for emission at 2kpc
41- 43 F3.1 --- e_beta2 ? rms uncertainty on beta2
45- 48 F4.2 --- chi22 ?=- chi2 value for emission at 2kpc
50- 51 I2 K T ?=- Temperature for integrated emission
53 I1 K e_T ? rms uncertainty on T
55- 57 F3.1 --- beta ?=- beta index for integrated emission
59- 61 F3.1 --- e_beta ? rms uncertainty on beta
63- 66 F4.2 --- chi2 ?=- chi2 value for integrated emission
68- 71 F4.1 K Tb2 Temperature for integrated emission with
beta=2
73- 75 F3.1 K e_Tb2 rms uncertainty on Tb2
77- 80 F4.2 --- chi2b2 chi2 value for integrated emission with
beta=2
82- 84 I3 % E70um 70um excess
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Jun-2017