J/AJ/132/2596 Spectroscopy of Ultraluminous IR galaxies (Darling+, 2006)
Optical spectral classification of major mergers: OH megamaser hosts versus
nonmasing (Ultra)Luminous Infrared Galaxies.
Darling J., Giovanelli R.
<Astron. J., 132, 2596-2617 (2006)>
=2006AJ....132.2596D 2006AJ....132.2596D
ADC_Keywords: Galaxies, IR ; Masers ; Redshifts ; Spectroscopy
Keywords: galaxies: interactions - galaxies: nuclei - galaxies: starburst -
masers - radio lines: galaxies
Abstract:
We investigate the types of nuclear environments that produce OH
megamasers (OHMs) with a study of the optical spectra of 40 OHM host
galaxies and a control sample of 30 non-masing (ultra)luminous
infrared galaxies ([U]LIRGs). The optical spectrophotometry provides
spatially resolved spectra of multiple nuclei in a few of these
merging systems. Of the 40 OHMs classified, 33% are starbursts, 42%
are LINERs, and 25% are Seyfert 2 galaxies; the classification of the
non-masing control sample is similar.
Description:
All of the spectroscopic data presented here were obtained at the
Palomar 5m telescope with the Double Spectrograph. Observations took
place in 2000 May and November.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 51 77 Optical Spectral Classification Sample
table2.dat 58 85 Redshifts
table4.dat 76 77 Optical Emission Line Fluxes
table5.dat 101 76 Observed and Dereddened Line Ratios and
Spectral Classification
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See also:
II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989)
J/AJ/124/100 : OH megamasers at z>0.1. III (Darling+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS Faint Source Catalog name (HHMMm+DDMM)
12- 13 A2 --- m_IRAS Multiplicity index on IRAS (G1)
15 A1 --- n_IRAS [a] Previously known OH megamaser (2)
17- 22 F6.4 --- z Optical heliocentric redshift from literature
24- 28 F5.2 [solLum] LFIR Log of the far-IR luminosity or lower limit
if interval (3)
30- 34 F5.2 [solLum] LFIRu ? If given indicates an upper limit on LFIR
36 A1 --- l_LOH Upper limit flag on LOH
38- 42 F5.2 [solLum] LOH ? Log of the isotropic OH luminosity (3)
44- 47 A4 --- Type Optical spectral classification (4)
49- 51 A3 --- r_Type Reference on Type (5)
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Note (2): a = Previously known OHM (see Paper III, Cat. J/AJ/124/100).
Note (3): In units of h-275 solar luminosities.
Note (4): Optical spectral classification as follows:
S2 = Seyfert type 2
A = active nucleus
H = HII region (starburst)
L = low-ionization emission region (LINER)
? = undetermined due to a missing emission line
Note (5): Reference on Type as follows:
1 = This work
2 = Veilleux, Kim, & Sanders (1999, Cat. J/ApJ/522/113)
3 = Strauss & Huchra (1988AJ.....95.1602S 1988AJ.....95.1602S)
4 = Frogel et al. (1989ApJ...343..672F 1989ApJ...343..672F)
5 = Veilleux et al. (1995ApJS...98..171V 1995ApJS...98..171V)
6 = Kim, Veilleux, & Sanders (1998ApJ...508..627K 1998ApJ...508..627K)
7 = Clowes et al. (1995MNRAS.275..819C 1995MNRAS.275..819C)
8 = Leech et al. (1994MNRAS.267..253L 1994MNRAS.267..253L)
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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- 10 A10 --- IRAS IRAS Faint Source Catalog name (HHMMm+DDMM)
12- 13 A2 --- m_IRAS Multiplicity index on IRAS (G1)
15- 21 F7.5 --- z Palomar optical heliocentric redshift
23- 24 I2 --- e_z The 1σ uncertainty in z
26- 30 I5 km/s cz Palomar optical heliocentric velocity
32- 34 I3 km/s e_cz The 1σ uncertainty in cz
36- 40 I5 km/s czL ? Optical heliocentric velocity assumed for
the Arecibo OHM survey
42- 44 I3 km/s e_czL ? The 1σ uncertainty in czL
46- 47 I2 --- r_czL ? Reference for czL (2)
49- 53 I5 km/s czOH ? Optical heliocentric velocity centroid of
the 1667 MHz OH line
55- 56 I2 km/s e_czOH ? The 1σ uncertainty in czOH
58 A1 --- n_czOH Note for 01364-1042 (3)
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Note (2): Redshifts references as follow:
1 = Saunders et al. (2000, Cat. VII/221)
2 = Kim & Sanders (1998ApJS..119...41K 1998ApJS..119...41K)
3 = Lawrence et al. (1999, Cat. J/MNRAS/308/897)
4 = Fisher et al. (1995, Cat. VII/185)
5 = Strauss & Huchra (1988AJ.....95.1602S 1988AJ.....95.1602S)
6 = Strauss et al. (1992, Cat. II/174)
7 = Dey, Strauss, & Huchra (1990AJ.....99..463D 1990AJ.....99..463D)
8 = Leech et al. (1994MNRAS.267..253L 1994MNRAS.267..253L)
9 = Klaas & Elsasser (1991A&AS...90...33K 1991A&AS...90...33K)
10 = Beers et al. (1995, Cat. J/AJ/109/874)
11 = Kim et al. (1995ApJS...98..129K 1995ApJS...98..129K)
12 = Vader et al. (1993AJ....106.1743V 1993AJ....106.1743V)
13 = Lu & Freudling (1995, Cat. J/ApJ/449/527)
Note (3): a = 01364-1042 is an OH megamaser (Bottinelli et al.
1989IAUC.4928....0B 1989IAUC.4928....0B), but no OH line redshift has been published.
Bottinelli et al. (1989IAUC.4928....0B 1989IAUC.4928....0B) report that there are two
1667MHz OH line components separated by roughly 200km/s.
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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- 10 A10 --- IRAS IRAS Faint Source Catalog name (HHMMm+DDMM)
12- 13 A2 --- m_IRAS Multiplicity index on IRAS (G1)
15- 20 F6.2 aW/m2 FHa Hα flux in units of 10-15erg/cm2/s
22- 24 I3 0.1nm EWHa Hα equivalent width (2)
26- 30 F5.2 [solLum] LHa Log of the Hα luminosity (3)
32- 35 F4.2 --- OII ? The [OII] (3727) to Hα flux ratio
37 A1 --- l_Hb Limit flag on Hb
38- 41 F4.2 --- Hb ? The Hβ to Hα flux ratio
43 A1 --- l_OIII Limit flag on OIII
44- 47 F4.2 --- OIII The [OIII] (5007) to Hα flux ratio
49- 52 F4.2 --- OI The [OI] (6300) to Hα flux ratio
54- 57 F4.2 --- N6548 The [NII] (6548) to Hα flux ratio
59- 62 F4.2 --- N6583 The [NII] (6583) to Hα flux ratio
64- 67 F4.2 --- S6716 ? The [SII] (6716) to Hα flux ratio
69- 72 F4.2 --- S6731 ? The [SII] (6731) to Hα flux ratio
74- 76 A3 --- OH The OH Type (G2)
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Note (2): In the object rest frame
(Δλo=Δλ/[1+z]) and in units of Angstroms.
Note (3): Corrected for reddening. The reddening correction follows the
methods described in Section 5.3.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS Faint Source Catalog name (HHMMm+DDMM)
12- 13 A2 --- m_IRAS Multiplicity index on IRAS (G1)
15- 18 F4.2 [-] Ha/Hb Log of the Hα/Hβ ratio
20- 24 F5.3 --- Ha/Hbd Dereddened value of Ha/Hb (2)
26- 29 F4.2 --- c Reddening parameter
31- 34 F4.2 mag E(B-V) E(B-V) color excess from the Balmer decrement
36 A1 --- l_OIII Limit flag on OIII
37- 41 F5.2 [-] OIII Log of the [OIII] (5007)/Hβ ratio
43 A1 --- l_OIIId Limit flag on OIIId
44- 48 F5.2 [-] OIIId Dereddened value of OIII (2)
50- 54 F5.2 [-] NII Log of the [NII] (6583)/Hα ratio
56- 60 F5.2 [-] NIId Dereddened value of NII (2)
62- 66 F5.2 [-] SII ? Log of the [SII] (6716+6731)/Hα ratio
68- 72 F5.2 [-] SIId ? Dereddened value of SII (2)
74- 78 F5.2 [-] OI Log of the [OI] (6300)/Hα ratio
80- 84 F5.2 [-] OId Dereddened value of OI (2)
86- 87 A2 --- cl1 Classification from [OIII]/Hβ versus
[NII]/Hα diagnostic diagram; Fig. 2 (3)
89- 90 A2 --- cl2 Classification from [OIII]/Hβ versus
[SII]/Hα diagnostic diagram; Fig. 2 (3)
92- 93 A2 --- cl3 Classification from [OIII]/Hβ versus
[OI]/Hα diagnostic diagram; Fig. 2 (3)
95- 97 A3 --- cl Adopted classification (3)
99-101 A3 --- OH The OH type (G2)
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Note (2): For HII regions (2.85) or AGN including LINERs (3.10).
Note (3): Classes are as follows:
S2 = Seyfert type 2
A = active nucleus
H = HII region (starburst)
L = low-ionization emission region (LINER)
If only two out of the three diagnostics agree, classifications are
followed by a colon to indicate some uncertainty in the adopted type.
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Global notes:
Note (G1): Components in multi-nucleus systems are indicated by rough
cardinal directions, although only one of the nuclei may have adequate
signal to noise to be classified.
Note (G2): OH type as follows:
OHM = OH megamaser
non = OH non-detection
? = unknown
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History:
From electronic version of the journal
References:
Darling & Giovanelli, Paper I 2000AJ....119.3003D 2000AJ....119.3003D
Darling & Giovanelli, Paper II 2001AJ....121.1278D 2001AJ....121.1278D
Darling & Giovanelli, Paper III 2002AJ....124..100D 2002AJ....124..100D, Cat. J/AJ/124/100
Darling & Giovanelli, Paper IV 2002ApJ...569L..87D 2002ApJ...569L..87D
Darling & Giovanelli, Paper V 2002ApJ...572..810D 2002ApJ...572..810D
Darling et al., Paper VI 2003AJ....125.1177D 2003AJ....125.1177D
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Jul-2008