J/ApJ/725/2270 Mid-IR emission lines in AGNs (Pereira-Santaella+, 2010)
The mid-infrared high-ionization lines from active galactic nuclei and
star-forming galaxies.
Pereira-Santaella M., Diamond-Stanic A.M., Alonso-Herrero A., Rieke G.H.
<Astrophys. J., 725, 2270-2280 (2010)>
=2010ApJ...725.2270P 2010ApJ...725.2270P
ADC_Keywords: Active gal. nuclei ; Galaxies, IR ; Galaxies, spectra ;
Spectra, infrared
Keywords: galaxies: active - galaxies: nuclei - galaxies: starburst -
infrared: galaxies
Abstract:
We used Spitzer/Infrared Spectrograph spectroscopic data on 426
galaxies including quasars, Seyferts, LINERs, and HII galaxies to
investigate the relationship among the mid-IR emission lines. There is
a tight linear correlation between the [NeV]14.3um and 24.3um (97.1eV)
and the [OIV]25.9um (54.9eV) high-ionization emission lines. The
correlation also holds for these high-ionization emission lines and
the [NeIII]15.56um (41eV) emission line, although only for active
galaxies. We used these correlations to calculate the [NeIII] excess
due to star formation in Seyfert galaxies. We also estimated the [OIV]
luminosity due to star formation in active galaxies and determined
that it dominates the [OIV] emission only if the contribution of the
active nucleus to the total luminosity is below 5%. We find that the
active galactic nucleus dominates the [OIV] emission in most Seyfert
galaxies, whereas star formation adequately explains the observed
[OIV] emission in optically classified HII galaxies. Finally, we
computed photoionization models to determine the physical conditions
of the narrow-line region where these high-ionization lines originate.
The estimated ionization parameter range is -2.8<logU←2.5 and the
total hydrogen column density range is 20<lognH(cm-2)<21.
Description:
The sample contains 426 galaxies for which high spectral resolution
(R∼600) Spitzer/IRS spectra were available, either in the literature,
in the Spitzer archive, or observed through the programs 40936 and
50597 (PI: G. H. Rieke).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 106 426 Sample and mid-infrared emission line fluxes
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See also:
VII/157 : The Extended 12um galaxy sample (Rush+ 1993)
J/MNRAS/414/500 : Spitzer/IRS ATLAS project source (Hernan-Caballero+, 2011)
J/ApJ/719/1191 : Mid-IR indicators of SF and AGN in galaxies (Treyer+, 2010)
J/ApJ/723/895 : IR luminosities and aromatic features of 5MUSES (Wu+, 2010)
J/ApJ/709/1257 : Spitzer-IRS spectra of Seyfert galaxies (Tommasin+, 2010)
J/ApJ/693/1821 : The Spitzer infrared nearby galaxies survey (Dale+, 2009)
J/ApJS/182/628 : Spitzer quasar and ULIRG evolution study (Veilleux+, 2009)
J/MNRAS/398/1165 : AGN in nearby galaxies (Goulding+, 2009)
J/ApJS/184/230 : Spitzer high-resolution MIR spectral atlas (Bernard-Salas+,
2009)
J/ApJ/701/1123 : MIR spectroscopic catalog of 150 galaxies (Dasyra+, 2009)
J/ApJ/705/14 : Seyfert galaxies in the mid-IR (Deo+, 2009)
J/ApJ/658/778 : Spitzer mid-IR spectroscopy of z∼2 ULIRGs (Yan+, 2007)
J/ApJS/112/315 : Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Name Object name
21- 22 A2 --- f_Name [cd ] Member of other samples (1)
24- 25 I2 h RAh NED Hour of Right Ascension (J2000)
27- 28 I2 min RAm NED Minute of Right Ascension (J2000)
30- 33 F4.1 s RAs NED Second of Right Ascension (J2000)
35 A1 --- DE- Sign of the NED Declination (J2000)
36- 37 I2 deg DEd NED Degree of Declination (J2000)
39- 40 I2 arcmin DEm NED Arcminute of Declination (J2000)
42- 43 I2 arcsec DEs NED Arcsecond of Declination (J2000)
45- 51 F7.2 Mpc Dist Distance (2)
53- 57 A5 --- Class NED spectral classification (H2, LINER, QSO,
Sy1 or Sy2)
59- 66 F8.3 10-17W/m2 NeII ? The [NeII] 12.81 micron line flux (3)
68 A1 --- l_NeV-14 Limit flag on NeV-14
69- 76 F8.4 10-17W/m2 NeV-14 The [NeV] 14.32 micron line flux (3)
78- 85 F8.3 10-17W/m2 NeIII ? The [NeIII] 15.56 micron line flux (3)
87 A1 --- l_NeV-24 Limit flag on NeV-24
88- 94 F7.3 10-17W/m2 NeV-24 ? The [NeV] 24.32 micron line flux (3)
96 A1 --- l_OIV Limit flag OIV
97-104 F8.3 10-17W/m2 OIV ? The [OIV] 25.89 micron line flux (3)
106 I1 --- Ref Reference (4)
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Note (1): Flag as follows:
c = Member of the RSA sample (relatively low-luminosity Seyferts; Maiolino &
Rieke 1995ApJ...454...95M 1995ApJ...454...95M; Ho et al. 1997, Cat. J/ApJS/112/315;
Diamond-Stanic et al. 2009ApJ...698..623D 2009ApJ...698..623D).
d = Member of the 12 micron sample (typical Seyfert galaxies; Rush et al.
1993, Cat. VII/157; Tommasin et al. 2010, Cat. J/ApJ/709/1257).
Note (2): We calculated the distance from the redshift assuming a flat
cosmology with H0=70km/s/Mpc, ΩM=0.3, and ΩΛ=0.7.
Except for the galaxies from Dale et al. (2009, Cat. J/ApJ/693/1821),
Bernard-Salas et al. (2009, Cat. J/ApJS/184/230) and Goulding &
Alexander (2009, Cat. J/MNRAS/398/1165) for which we used the
distances adopted by these authors.
Note (3): In units of 10-14erg/s/cm2.
Note (4): Reference as follows:
1 = Veilleux et al. (2009, Cat. J/ApJS/182/628; QUEST sample);
2 = This work;
3 = Farrah et al. (2007ApJ...667..149F 2007ApJ...667..149F)
4 = Tommasin et al. (2008ApJ...676..836T 2008ApJ...676..836T, 2010, Cat. J/ApJ/709/1257);
5 = Dale et al. (2009, Cat. J/ApJ/693/1821)
6 = Gorjian et al. (2007ApJ...655L..73G 2007ApJ...655L..73G);
7 = Goulding & Alexander (2009, Cat. J/MNRAS/398/1165);
8 = Bernard-Salas et al. (2009, Cat. J/ApJS/184/230).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Aug-2012