J/ApJS/112/315 Spectroscopic parameters of Seyfert nuclei (Ho+ 1997)
A search for "Dwarf" Seyfert nuclei.
III. Spectroscopic parameters and properties of the host galaxies.
Ho L.C., Filippenko A.V., Sargent W.L.W.
<Astrophys. J. Suppl. Ser. 112, 315 (1997)>
=1997ApJS..112..315H 1997ApJS..112..315H
ADC_Keywords: Galaxies, Seyfert ; Active gal. nuclei ; Spectroscopy
Keywords: galaxies: active - galaxies: fundamental parameters - galaxies: ISM -
galaxies: nuclei - galaxies: Seyfert
Abstract:
We have completed an optical spectroscopic survey of the nuclear
regions (r≤200pc) of a large sample of nearby galaxies. Although the
main objectives of the survey are to search for low-luminosity active
galactic nuclei and to quantify their luminosity function, the
database can be used for a variety of other purposes. This paper
presents measurements of the spectroscopic parameters for the 418
emission-line nuclei, along with a compilation of the global
properties of all 486 galaxies in the survey. Stellar absorption
generally poses a serious obstacle to obtaining accurate measurement
of emission lines in nearby galactic nuclei. We describe a procedure
for removing the starlight from the observed spectra in an efficient
and objective manner. The main parameters of the emission lines
(intensity ratios, fluxes, profile widths, and equivalent widths) are
measured and tabulated, as are several stellar absorption-line and
continuum indices useful for studying the stellar population. Using
standard nebular diagnostics, we determine the probable ionization
mechanisms of the emission-line objects. The resulting spectral
classifications provide extensive information on the demographics of
emission-line nuclei in the nearby regions of the universe. This new
catalog contains over 200 objects showing spectroscopic evidence for
recent star formation and an equally large number of active galactic
nuclei, including 46 that show broad Hα emission. These samples
will serve as the basis of future studies of nuclear activity in
nearby galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 12 79 List of template galaxies
table2.dat 98 418 Parameters of strong emission lines
table3.dat 58 116 Intensities of weak emission lines
table4.dat 70 418 Emission-line intensity ratios and spectral
classification
table7.dat 54 486 Stellar continuum magnitudes and colors
table9.dat 60 486 Equivalent widths of stellar absorption lines
table10.dat 88 486 General properties of the host galaxies
table11.dat 73 486 Photometric properties of the host galaxies
table12.dat 67 10 Summary of the morphological types in the
Palomar survey
table13.dat 102 486 IRAS measurements of the host galaxies
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See also:
VII/155 : 3rd Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991)
J/ApJS/98/477 : Optical spectral atlas of Seyfert nuclei (Ho+ 1995)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
10- 11 I2 --- Template Template number
12 A1 --- n_Template [a] a: Only blue spectrum used as template;
red spectrum contains weak emission lines
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicity index on Name
11- 14 F4.2 --- Hgamma ? Hγ line-intensity ratio (1)
15 A1 --- n_Hgamma [bc] Note on Hgamma (G1)
17- 20 F4.2 --- Hbeta ? Hβ line-intensity ratio (1)
21- 22 A2 --- n_Hbeta [bcsu ] Note on Hbeta (G1)
24- 27 F4.2 --- [OIII] ? [O III]lambda5007 line-intensity ratio (1)
28 A1 --- n_[OIII] [Lbcu] Note on [OIII] (G1)
30- 34 F5.3 --- [OI] ? [O I]lambda6300 line-intensity ratio (1)
35 A1 --- n_[OI] [bcu] Note on [OI] (G1)
37- 40 F4.2 --- [NII] ? [N II]lambda6583 line-intensity ratio (1)
41 A1 --- n_[NII] [Lbcu] Note on [NII] (G1)
43- 46 F4.2 --- [SII]a ? [S II]lambda6716 line-intensity ratio (1)
47 A1 --- n_[SII]a [Lbcsu] Note on [SII]a (G1)
49- 52 F4.2 --- [SII]b ? [S II]lambda6731 line-intensity ratio (1)
53 A1 --- n_[SII]b [Lbcsu] Note on [SII]b (G1)
55- 60 F6.2 [mW/m2] logF(Ha) Observed flux of the narrow component of
Hα
61- 62 A2 --- n_logF(Ha) [Lbcu ] Note on logF(Halpha)
64- 68 F5.2 [10-7W] logL(Ha) ? Luminosity of the narrow component of
Hα using distances adopted in Table 10
69- 70 A2 --- n_logL(Ha) [Lbcu ] Note on logL(Halpha)
72- 78 F7.2 0.1nm EW(Ha) ? Equivalent width of the narrow component
of Hα
79 A1 --- n_EW(Ha) [bcu] Note on EW(Halpha) (G1)
81- 83 I3 km/s FWHM ? FWHM of [N II] λ6583,
corrected for instrumental resolution
84 A1 --- n_FWHM [ucb] Note on FWHM (G1)
86- 98 A13 --- Template Template galaxies used for starlight
subtraction, numbered as in table1.dat (3)
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Note (1): Line-intensity ratios of the indicated lines relative to the
narrow component of Hα; Hγ and Hβ refer only to the
narrow component.
Note (3): 0 alone implies that no starlight subtraction was necessary.
The emission-line intensity ratios, fluxes, and luminosities are the
observed values (not corrected for reddening).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicity index on Name
11- 16 F6.4 --- [OIII] ? [O III]lambda4363 line-intensity ratio (1)
17 A1 --- n_[OIII] [bc] Note on [OIII] (G1)
19- 24 F6.4 --- HeI ? He I lambda4471 line-intensity ratio (1)
27- 32 F6.4 --- HeII ? He II lambda4686 line-intensity ratio (1)
33 A1 --- n_HeII [bc] Note on HeII (G1)
35- 40 F6.4 --- [SIII] ? [S III]lambda6312 line-intensity ratio (1)
41 A1 --- n_[SIII] [b] Note on [SIII] (G1)
43- 48 F6.4 --- [FeX] ? [Fe X]lambda6374 line-intensity ratio (1)
49 A1 --- n_[FeX] [bc] Note on [FeX] (G1)
52- 57 F6.4 --- HeIb ? He I lambda6678 line-intensity ratio (1)
58 A1 --- n_HeIb [b] Note on HeIb (G1)
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Note (1): Line intensities normalized to the intensity of Hα;
the values have not been corrected for reddening.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicity index on name
11- 15 F5.2 --- Ha/Hb ? Hα/Hβ intensity ratio (1)
16 A1 --- n_Ha/Hb [bcL] Note on Ha/Hb (G1)
18- 21 F4.2 mag E(B-V)int ? Internal reddening derived from Ha/Hb
23- 26 F4.2 --- R([SII]) ? [S II]lambda6716/[S II]lambda6731
intensity ratio
27 A1 --- n_R([SII]) [bc] Note on R([SII]) (G1)
29- 32 I4 --- Ne ? Electronic density derived from R([SII])
33 A1 --- n_Ne [bc] Note on Ne (G1)
35- 39 F5.2 --- [OIII]/Hb ? Derredenned [O III]/Hβ intensity ratio
40 A1 --- n_[OIII]/Hb [Lbcu] Note on [OIII]/Hb
42- 46 F5.3 --- [OI]/Ha Derredenned [O I]/Hα intensity ratio
47 A1 --- n_[OI]/Ha [ubc] Note on [OI]/Ha (G1)
49- 52 F4.2 --- [NII]/Ha Derredenned [N II]/Hα intensity ratio
53 A1 --- n_[NII]/Ha [Lubc] Note on [NII]/Ha (G1)
55- 58 F4.2 --- [SII]/Ha ? Derredenned [S II]/Hα intensity ratio
59 A1 --- n_[SII]/Ha [Lubc] Note on [SII]/Ha (G1)
61- 69 A9 --- Class Classification of nebular spectrum (3)
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Note (1): Corrrected for Galactic reddening
Note (3): The classifications are:
H = H II nucleus
S = Seyfert galaxy
L = LINER
T = Transition object
The number attached to the class letter designates the type (1.0, 1.2,
1.5, 1.8, 1.9 and 2); quality ratings are given by ":" and "::" for
uncertain and highly uncertain classification, respectively.
Two classifications are given for ambiguous cases, where the first
entry corresponding to the adopted choice.
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Table 5: Criteria for spectral classification
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[O III]/Hβ [O I]/Hα [N II]/Hα [S II]/Hα
Class lambda5007 lambda6300 lambda6583 lambdalambda
6716,6731
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H II nuclei Any <0.08 <0.6 <0.4
Seyfert nuclei ≥3 ≥0.08 ≥0.6 ≥0.4
LINERs <3 ≥0.17 ≥0.6 ≥0.4
Transition nuclei <3 ≥0.08, <0.17 ≥0.6 ≥0.4
--------------------------------------------------------------------------------
Note: Line ratios are dereddened values. Hα and Hβ indicate
the narrow component of those lines.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicity index on name
11- 15 F5.2 mag m44 ? m44 magnitude (1)
17- 21 F5.2 mag m49 ? m49 magnitude (1)
23- 27 F5.2 mag m66 ? m66 magnitude (1)
29- 33 F5.2 mag c(44-49) ? m44-m49 colour index (1)
35- 39 F5.2 mag c(44-66) ? m49-m66 colour index (1)
41- 45 F5.2 mag c(49-66) ? m49-m66 colour index (1)
47- 52 F6.2 mag M44 ? Absolute M44 magnitude
53 A1 --- n_M44 [a] Assumption on M44 (2)
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Note (1): Definition of continuum bands
----------------------------------------------------
Band λc Region 1 Region 2
0.1nm 0.1nm 0.1nm
----------------------------------------------------
m44 4340 4262-4281 4360-4375
m49 4861 4828-4848 4880-4900
m66 6563 6518-6538 6595-6620
----------------------------------------------------
The continuum magnitudes and colors have not been corrected for reddening.
Note (2): 'a' when assuming c(44-66)=1.48mag, the median value for
the elliptical galaxies in our sample.
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Table 8: Definitions of stellar absorption-line indices
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Index Continuum 1 Feature Continuum 2 Ref
0.1nm 0.1nm 0.1nm
--------------------------------------------------------------------------------
W(G band) 4267.6-4282.6 4282.6-4317.6 4320.1-4336.4 1
W(Hγ) 4316.0-4321.0 4333.0-4348.0 4360.0-4370.0 2
W(Fe4383) 4360.4-4370.4 4370.4-4421.6 4444.1-4456.6 1
W(Ca4455) 4444.0-4448.5 4453.4-4475.9 4478.0-4486.0 1
W(Fe4531) 4504.5-4515.5 4515.5-4560.5 4561.8-4580.5 1
W(Fe4668) 4612.8-4631.5 4635.3-4721.5 4744.0-4757.8 1
W(Hβ) 4828.9-4848.9 4848.9-4877.6 4877.6-4892.6 1
W(Ca+Fe) 6462.0-6475.0 6475.0-6515.0 6515.0-6530.0 3
W(Hα) 6515.0-6530.0 6535.0-6585.0 6585.0-6600.0 3
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References:
(1) Worthey 1992, Ph.D. thesis, Univ. of California, Santa Cruz
(2) Held & Mould, 1994AJ....107.1307H 1994AJ....107.1307H
(3) this paper
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicity index on Name
11- 14 F4.2 0.1nm W(G) ? G band equivalent width
16- 19 F4.2 0.1nm W(Hg) ? Hγ equivalent width
21- 24 F4.2 0.1nm W(Hb) ? Hβ equivalent width
26- 29 F4.2 0.1nm W(Ha) ? Hα equivalent width
31- 34 F4.2 0.1nm W(Fe4383) ? Fe 4383 equivalent width
36- 39 F4.2 0.1nm W(Fe4531) ? Fe 4531 equivalent width
41- 45 F5.2 0.1nm W(Fe4668) ? Fe 4668 equivalent width
47- 50 F4.2 0.1nm <W(Fe)> ? Average Fe equivalent width
52- 55 F4.2 0.1nm W(Ca4455) ? Ca 4455 equivalent width
57- 60 F4.2 0.1nm W(Ca+Fe) ? Ca + Fe equivalent width
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicty index on Name
11- 25 A15 --- MType Hubble type
27- 30 F4.1 --- T ? Numerical Hubble type index
32- 35 I4 km/s HRV Heliocentric radial velocity
37- 41 F5.1 Mpc Dist Distance
43- 46 I4 km/s DVHI ? Velocity width at 20% of the peak of the
H I profile
47 A1 --- n_DVHI [abcd] Note on DVHI (1)
49- 52 I4 km/s DVrot ? Rotational amplitude corrected for
inclination, as given in Table 11
53 A1 --- n_DVrot [abcd] Note on DVrot (1)
55- 60 F6.4 Sun MHI/LB ? H I mass normalized to the
extinction-corrected B-band luminosity by
adopting M0BT from Table 11
61 A1 --- n_MHI/LB [uc] Note on MHI/LB (2)
63- 66 F4.2 Mpc-3 rhoGal ? Local galaxy density
68- 72 F5.1 --- thetap ? Projected angular separation (3)
73 A1 --- n_thetap [Lps] Note on thetap (4)
75- 81 A7 --- Group Group membership in the catalog of Garcia 1993
83- 85 A3 --- Virgo Membership in the Virgo Cluster
87- 88 I2 --- Ref ? References Source of the H I data shown in
DVHI, DVrot and MHI/LB if not taken from
the RC3 (5)
--------------------------------------------------------------------------------
Note (1): the symbols have the following meaning:
a: The velocity is a lower limit because the inclination is not available
b: Inclination correction uncertain; inclination set to 30°
c: Possibly confused by an other galaxy
d: The velocity width was measured at 50% of the peak of the HI profile
Note (2):
u: implies an upper limit
c: indicates that the measurement is possibly confused by another
nearby galaxy
Note (3): the projected angular separation (in units of the angular
diameter D25) to the nearest neighboring galaxy having an apparent
magnitude brighter than BT+1.5mag and a systemic velocity equal to
HRV±500km/s.
Note (4): the symbols have the following meaning:
p: for pair, it means that the galaxy is a recognized member of a
close galaxy pair
L: lower limits
s: unexplained
Note (5): References:
1: Kamphuis, Sijbring, & van Albada, 1996, Cat J/A+AS/116/15
2: Roberts et al., 1991ApJS...75..751R 1991ApJS...75..751R
3: Huchtmeier & Richter, 1989, A General Catalog of HI Observations of
Galaxies (New York: Springer)
4: Knapp, Turner, & Cunniffe, 1985AJ.....90..454K 1985AJ.....90..454K
5: Huchtmeier, 1994A&A...286..389H 1994A&A...286..389H
6: Haynes et al., 1990AJ.....99.1740H 1990AJ.....99.1740H
7: Huchtmeier, Sage, & Henkel, 1995A&A...300..675H 1995A&A...300..675H
8: Wardle & Knapp, 1986AJ.....91...23W 1986AJ.....91...23W
9: Huchtmeier & Richter, 1986A&AS...64..111H 1986A&AS...64..111H
10: Garcia-Barreto, Downes, & Huchtmeier, 1994A&A...288..705G 1994A&A...288..705G
11: Richter & Huchtmeier, 1991A&AS...87..425R 1991A&AS...87..425R
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicity index on Name
11- 15 F5.2 mag BT Total (asymptotic) apparent B magnitude
17- 20 F4.2 mag Ag Galactic extinction
22- 25 F4.2 mag Ai Internal extinction
27- 31 F5.2 mag BT0 Total apparent B magnitude corrected
for Ag, Ai and redshift
33- 36 F4.2 mag (B-V)T0 ? Total, corrected B-V color
38- 42 F5.2 mag (U-B)T0 ? Total, corrected U-B color
44- 49 F6.2 mag MBT0 Total, corrected absolute B magnitude assuming
the distances adopted in Table 10
51- 56 F6.2 mag MBbul ? Statistical estimate of the absolute B
magnitude of the bulge
58- 59 I2 deg i ? Inclination of the disk to the line of sight
61- 66 F6.2 arcmin D25 Isophotal major axis diameter (measured at
µ_B=25mag/arcsec2)
68- 73 F6.2 arcmin D250 D25 corrected to face-on orientation
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Mtype Hubble type
11- 19 A9 --- T Numerical Hubble type index interval
21- 23 I3 --- Ntot Total galaxies number
25- 29 F5.1 % Ptot Percentage of the total galaxies
31- 33 I3 --- Nunb Unbarred galaxies number
35- 39 F5.1 % Punb Percentage of the unbarred galaxies
41- 43 I3 --- Nb Barred (B+AB in RC3) galaxies number
46- 49 F4.1 % Pb Percentage of the barred galaxies
51- 53 I3 --- Nwb Weakly barred (AB in RC3) galaxies number
55- 58 F4.1 % Pwb Percentage of the weakly barred galaxies
60- 62 I3 --- Nsb Strongly barred (B in RC3) galaxies number
64- 67 F4.1 % Psb Percentage of the strongly barred galaxies
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Byte-by-byte Description of file: table13.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Galaxy name
9 A1 --- m_Name Multiplicity index on Name
11- 16 F6.2 Jy S12um ? Flux density in the 12µm band
17 A1 --- n_S12um [uL] Note on S12um (G1)
19- 24 F6.3 Jy e_S12um ? rms uncertainty on S12um
26- 31 F6.2 Jy S25um ? Flux density in the 25µm band
32 A1 --- n_S25um [uL] Note on S25um (G1)
34- 39 F6.3 Jy e_S25um ? rms uncertainty on S25um
41- 46 F6.2 Jy S60um ? Flux density in the 60µm band
47- 48 A2 --- n_S60um [uL E3] Note on S60um (G1)
50- 56 F7.3 Jy e_S60um ? rms uncertainty on S60um
58- 63 F6.2 Jy S100um ? Flux density in the 100µm band
64- 65 A2 --- n_S100um [uL E3] Note on S100um (G1)
67- 73 F7.3 Jy e_S100um ? rms uncertainty on S100um
75- 80 F6.2 [W/m2] logFIR ? Logarithm of the FIR parameter
81 A1 --- n_logFIR [uL] Note on logFIR (G1)
83- 86 F4.2 --- S12/S25 ? Ratios of flux densities at 12um to 25um
87 A1 --- n_S12/S25 [uL] Note on S12/S25 (G1)
89- 92 F4.2 --- S25/S60 ? Ratios of flux densities at 25um to 60um
93 A1 --- n_S25/S60 [uL] Note on S25/S60 (G1)
95- 98 F4.2 --- S60/S100 ? Ratios of flux densities at 60um to 100um
99 A1 --- n_S60/S100 [uL] Note on S60/S100 (G1)
101-102 I2 --- Ref References (2)
--------------------------------------------------------------------------------
Note (2): Reference numbers are:
1: Rice et al., 1988, Cat. VII/109
2: Helou et al., 1988ApJS...68..151H 1988ApJS...68..151H
3: Soifer et al., 1989AJ.....98..766S 1989AJ.....98..766S
4: Knapp et al., 1989, Cat. J/ApJS/70/329
5: Rush, Malkan, & Spinoglio, 1993, Cat. VII/157
6: Moshir et al., 1990, Cat. II/156
7: Melisse & Israel, 1994A&AS..103..391M 1994A&AS..103..391M
8: Rodriguez-Espinosa, Rudy, & Jones, 1987ApJ...312..555R 1987ApJ...312..555R
9: van Driel et al., 1993A&AS..101..207V 1993A&AS..101..207V
10: Sanders et al., 1995, Cat. J/AJ/110/1993
11: Bushouse, Lamb, & Werner, 1988ApJ...335...74B 1988ApJ...335...74B
12: Surace et al., 1993AJ....105..864S 1993AJ....105..864S
13: Roberts et al., 1991ApJS...75..751R 1991ApJS...75..751R
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Global Notes:
Note (G1): the quality indicators have the following meaning:
L = 3σ lower limit;
u = 3σ upper limit, except for FWHM([NII]), where the symbol
denotes the upper limit to the line width and the value given is
the observed FWHM (not corrected for instrumental resolution);
s = line strength obtained by scaling the intensity of another line
([O III] λ5007 from [O III] λ4959, and also Hβ
from Hα and vice versa, assuming
Hα = 2.86 Hβ for H II nuclei and
Hα = 3.1 Hβ for all others).
In addition, quality ratings are assigned where appropriate.
b = Values with uncertainties of ±30%-50%
c = highly uncertain values with probable errors of ±100%
History: From ApJS electronic version
References:
Filippenko et al., Paper I. 1985ApJS...57..503F 1985ApJS...57..503F
Ho et al., Paper II. 1995ApJS...98..477H 1995ApJS...98..477H, Cat. J/ApJS/98/477
Ho et al., Paper IV. 1997ApJS..112..391H 1997ApJS..112..391H
Ho et al., Paper V. 1997ApJ...487..568H 1997ApJ...487..568H
(End) Patricia Bauer [CDS] 03-Apr-1998