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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
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:
FileName Lrecl Records Explanations
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
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
Bytes Format Units Label Explanations
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)
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) 4 = Frogel et al. (1989ApJ...343..672F) 5 = Veilleux et al. (1995ApJS...98..171V) 6 = Kim, Veilleux, & Sanders (1998ApJ...508..627K) 7 = Clowes et al. (1995MNRAS.275..819C) 8 = Leech et al. (1994MNRAS.267..253L)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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)
Note (2): Redshifts references as follow: 1 = Saunders et al. (2000, Cat. VII/221) 2 = Kim & Sanders (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) 6 = Strauss et al. (1992, Cat. II/174) 7 = Dey, Strauss, & Huchra (1990AJ.....99..463D) 8 = Leech et al. (1994MNRAS.267..253L) 9 = Klaas & Elsasser (1991A&AS...90...33K) 10 = Beers et al. (1995, Cat. J/AJ/109/874) 11 = Kim et al. (1995ApJS...98..129K) 12 = Vader et al. (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), but no OH line redshift has been published. Bottinelli et al. (1989IAUC.4928....0B) report that there are two 1667MHz OH line components separated by roughly 200km/s.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
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 Halpha equivalent width (2) 26- 30 F5.2 [solLum] LHa Log of the Halpha 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)
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.
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
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]/Hbeta versus [NII]/Hα diagnostic diagram; Fig. 2 (3) 89- 90 A2 --- cl2 Classification from [OIII]/Hbeta versus [SII]/Hα diagnostic diagram; Fig. 2 (3) 92- 93 A2 --- cl3 Classification from [OIII]/Hbeta versus [OI]/Hα diagnostic diagram; Fig. 2 (3) 95- 97 A3 --- cl Adopted classification (3) 99-101 A3 --- OH The OH type (G2)
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.
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
History: From electronic version of the journal References: Darling & Giovanelli, Paper I 2000AJ....119.3003D Darling & Giovanelli, Paper II 2001AJ....121.1278D Darling & Giovanelli, Paper III 2002AJ....124..100D, Cat. J/AJ/124/100 Darling & Giovanelli, Paper IV 2002ApJ...569L..87D Darling & Giovanelli, Paper V 2002ApJ...572..810D Darling et al., Paper VI 2003AJ....125.1177D
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Jul-2008
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