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J/MNRAS/398/1165    AGN in nearby galaxies                   (Goulding+, 2009)
Towards a complete census of AGN in nearby galaxies:
a large population of optically unidentified AGN.
    Goulding A.D., Alexander D.M.
   <Mon. Not. R. Astron. Soc., 398, 1165-1193 (2009)>
   =2009MNRAS.398.1165G
ADC_Keywords: Galaxies, nearby ; Active gal. nuclei ; Spectra, infrared

Keywords: galaxies: active - galaxies: evolution - galaxies: nuclei -
          infrared: galaxies

Abstract:
    Using Spitzer-infrared spectrograph (IRS) spectroscopy, we investigate
    the ubiquity of active galactic nuclei (AGN) in a complete (∼94%),
    volume-limited sample of the most bolometrically luminous galaxies
    [LIR,8-1000um≥(0.3-20)x1010L☉] to D<15Mpc. Our analyses 
    are based on the detection of the high-excitation emission line
    [NeV](λ14.32µm) (97.1eV) to unambiguously identify AGN
    activity. We find that 17 of the 64 infrared (IR) bright galaxies in
    our sample host AGN activity (∼27+86%), ≥50t of which are not
    identified as AGN using optical spectroscopy.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       112       64   Catalogue of sources and derived quantities
table3.dat       138       64   Mid-IR spectral emission lines


See also:
   J/AJ/114/2353 : AGNs and QSOs behind nearby galaxies (Crampton+, 1997)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units    Label     Explanations

   1- 12  A12   ---      Galaxy    Common galaxy name
  14- 15  I2    h        RAh       Right ascension (J2000) (1)
  17- 18  I2    min      RAm       Right ascension (J2000) (1)
  20- 23  F4.1  s        RAs       Right ascension (J2000) (1)
      25  A1    ---      DE-       Declination sign (J2000) (1)
  26- 27  I2    deg      DEd       Declination (J2000) (1)
  29- 30  I2    arcmin   DEm       Declination (J2000) (1)
  32- 33  I2    arcsec   DEs       Declination (J2000) (1)
  35- 38  F4.1  Mpc      Dist      Luminosity distance to source from the RBGS
                                    (Sanders et al., 2003, Cat. J/AJ/126/1607)
  40- 43  F4.2  kpc      SH1       Projected spectral aperture in short-high (4)
      44  A1    ---      ---       [x]
  45- 48  F4.2  kpc      SH2       Projected spectral aperture in short-high (4)
  50- 53  F4.2  kpc      LH1       Projected spectral aperture in long-high (4)
      54  A1    ---      ---       [x]
  55- 58  F4.2  kpc      LH2       Projected spectral aperture in long-high (4)
  60- 62  A3    ---      MType     Morphological classification from RC3 (de
                                    Vaucouleurs et al., 1991, Cat. VII/155)
  64- 68  F5.2  [solLum] logLIR    logarithm of IR luminosity (8-1000um) from
                                    RBGS (Cat. J/AJ/126/1607)
  70- 77  A8    ---      Class     Optical spectral class from BPT
                                    diagnostics (2)
      78  A1    ---      l_Ha/Hb   Limit flag on Ha/Hb
  79- 83  F5.2  ---      Ha/Hb     ? Halpha-to-Hbeta optical emission line ratio
      85  A1    ---   l_[OIII]/Hb  Limit flag on [OIII]/Hb
  86- 90  F5.2  ---     [OIII]/Hb  ? [OIII]-to-Hbeta optical emission line ratio
  92- 95  F4.2  ---      [SII]/Ha  ? [SII]-to-Halpha optical emission line ratio
  97-100  F4.2  ---      [NII]/Ha  ? [NII]-to-Halpha optical emission line ratio
     102  A1    ---     l_F[OIII]  Limit flag on F[OIII]
 103-110  F8.2  aW/m2    F[OIII]   ? Observed [O III] flux (10-15erg/cm2/s)
     112  I1    ---      Ref       ? References for published optical data (3)

Note (1): 2MASS near-IR position of galactic nucleus

Note (2): Optical spectral class as follows:
    S2  = Seyfert 2; broad-line subclass in parentheses
    HII = star-forming galaxy and
    L   = LINER
Note (3): References as follows:
      1 = Ho et al. (1997, Cat. J/ApJS/112/315
      2 = Kewley et al. (2001, Cat. J/ApJS/132/37)
      3 = Veilleux et al. (1995ApJS...98..171V)
      4 = Veron-Cetty et al. (1986A&AS...66..335V)
      5 = Moorwood et al. (1996A&A...308L...1M)
      6 = Moustakas & Kennicutt (2006, Cat. J/ApJS/164/81)
      7 = Kirhakos & Steiner (1990AJ.....99.1722K)
      8 = Ganda et al. (2006MNRAS.367...46G)
      9 = Barth et al. (2009ApJ...690.1031B)
Note (4): short-high (SH) is the wavelength range 9.9-19.6µm,
       and long-high (LH) is the wavelength range 18.7-32µm.


Byte-by-byte Description of file: table3.dat

   Bytes Format Units      Label     Explanations

   1- 12  A12   ---        Galaxy    Common galaxy name
  14- 19  F6.3  um         EWPAH     Equivalent widths the 11.3um PAH feature
  21- 27  F7.2  10-17W/m2  F[NeII]   Flux of [NeII] 12.81um, 21.6eV (6)
  29- 34  F6.2  10-17W/m2 e_F[NeII]  ? rms uncertainty on e_F[NeII] (6)
      36  A1    ---        l_F[NeV]  Limit flag on F[NeV] (5)
  37- 42  F6.2  10-17W/m2  F[NeV]    Flux at [NeV] 14.32um, 97.1eV (6)
  44- 48  F5.2  10-17W/m2  e_F[NeV]  ? rms uncertainty on F[NeV] (6)
      50  A1    ---      l_F[NeIII]  Limit flag on F[NeIII] (5)
  51- 57  F7.2  10-17W/m2  F[NeIII]  Flux at [NeIII] 15.56um, 41.0eV (6)
  59- 63  F5.2  10-17W/m2 e_F[NeIII]  ? rms uncertainty on F[NeIII] (6)
      65  A1    ---       l_F[NeV]2  Limit flag on F[NeV]2 (5)
  66- 71  F6.2  10-17W/m2  F[NeV]2   Flux at [NeV] 24.32um, 97.1eV (6)
  73- 77  F5.2  10-17W/m2 e_F[NeV]2  ? rms uncertainty on F[NeV]2 (6)
      79  A1    ---        l_F[OIV]  Limit flag on [OIV] (5)
  80- 86  F7.2  10-17W/m2  F[OIV]    Flux at [O IV] 25.89um, 54.9eV (6)
  88- 93  F6.2  10-17W/m2  e_F[OIV]  ? rms uncertainty on F[OIV] (6)
      95  A1    ---       l_F[FeII]  Limit flag on F[FeII] (5)
  96-101  F6.2  10-17W/m2  F[FeII]   Flux at [Fe II] 25.99um, 7.9eV (6)
 103-107  F5.2  10-17W/m2 e_F[FeII]  ? rms uncertainty on [FeII] (6)
     109  A1    ---       l_F[SIII]  Limit flag on F[SIII] (5)
 110-116  F7.2  10-17W/m2  F[SIII]   Flux at [S III] 33.48um. 23.3eV (6)
 118-122  F5.2  10-17W/m2 e_F[SIII]  ? rms uncertainty on F[SIII] (6)
 124-130  F7.2  10-17W/m2  F[SIII]2  Flux at [S III]   34.82um, 8.2eV (6)
 132-136  F5.2  10-17W/m2 e_F[SIII]2  ? rms uncertainty on F[SIII]2 (6)
     138  A1    ---        IRAGN?    [Y] Mid-IR AGN? on the basis of
                                         [NeV] 14.32um emission

Note (5): 3σ upper limits are quoted for non-detections.

Note (6): in 10-14erg/cm2/s



History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    21-Jan-2010