J/ApJ/777/156 Spitzer/IRS spectra of GOALS luminous IR galaxies (Inami+, 2013)
Mid-infrared atomic fine-structure emission-line spectra of luminous infrared
galaxies: Spitzer/IRS spectra of the GOALS sample.
Inami H., Armus L., Charmandaris V., Groves B., Kewley L., Petric A.,
Stierwalt S., Diaz-Santos T., Surace J., Rich J., Haan S., Howell J.,
Evans A.S., Mazzarella J., Marshall J., Appleton P., Lord S., Spoon H.,
Frayer D., Matsuhara H., Veilleux S.
<Astrophys. J., 777, 156 (2013)>
=2013ApJ...777..156I 2013ApJ...777..156I
ADC_Keywords: Galaxies, IR ; Spectra, infrared
Keywords: galaxies: ISM; galaxies: starburst; infrared: galaxies
Abstract:
We present the data and our analysis of mid-infrared atomic
fine-structure emission lines detected in Spitzer/Infrared
Spectrograph high-resolution spectra of 202 local Luminous Infrared
Galaxies (LIRGs) observed as part of the Great Observatories All-sky
LIRG Survey (GOALS). We readily detect emission lines of [SIV],
[NeII], [NeV], [NeIII], [SIII]18.7µm, [OIV], [FeII],
[SIII]33.5µm, and [SiII]. More than 75% of these galaxies are
classified as starburst-dominated sources in the mid-infrared, based
on the [NeV]/[NeII] line flux ratios and equivalent width of the
6.2µm polycyclic aromatic hydrocarbon feature. We compare ratios of
the emission-line fluxes to those predicted from stellar
photo-ionization and shock-ionization models to constrain the physical
and chemical properties of the gas in the starburst LIRG nuclei.
Comparing the [SIV]/[NeII] and [NeIII]/[NeII] line ratios to the
Starburst99-Mappings III models with an instantaneous burst history,
the emission-line ratios suggest that the nuclear starbursts in our
LIRGs have ages of 1-4.5 Myr, metallicities of 1-2Z☉, and
ionization parameters of 2-8x107cm/s. Based on the
[SIII]33.5µm/[SIII]18.7µm ratios, the electron density in
LIRG nuclei is typically one to a few hundred/cm3, with a median
electron density of ∼300/cm3, for those sources above the low density
limit for these lines.
Description:
The high-resolution spectra of the Great Observatories All-sky LIRG
Survey (GOALS; Armus et al. 2009PASP..121..559A 2009PASP..121..559A) sources were obtained
with Spitzer/IRS. The Short-High (SH) and Long-High (LH) spectra cover
a range of 10-20um and 19-38um, respectively. The bulk of the IRS
observations (152/246) were carried out under program 30323 (PI:
Armus), with the remainder of the data retrieved from the Spitzer
archive.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 126 243 *Spitzer/IRS Short-High line fluxes (10-20um)
table2.dat 144 245 *Spitzer/IRS Long-High line fluxes (19-38um)
table3.dat 40 80 Neon emission line widths for the sources showing
resolved lines
--------------------------------------------------------------------------------
Note on table1.dat and table2.dat: The other parameters used in this paper and
their references are:
LIR (Armus et al. 2009PASP..121..559A 2009PASP..121..559A, Table 1),
6.2µm PAH EQW and merger stages (Stierwalt et al. 2013, J/ApJS/206/1,
and IR8 (Ratio of total infrared luminosity to rest-frame 8um luminosity;
Diaz-Santos et al. in prep.).
--------------------------------------------------------------------------------
See also:
J/ApJS/206/1 : Mid-IR properties of GOALS nearby LIRGs (Stierwalt+, 2013)
J/ApJ/774/68 : [CII]157.7um spectroscopic obs. of LIRGs (Diaz-Santos+, 2013)
J/ApJS/203/3 : Spectroscopy of 39 IRAS 1Jy sample ULIRG (Soto+, 2012)
J/ApJ/741/32 : Spatial extent of LIRGs in the MIR. II. (Diaz-Santos+, 2011)
J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)
J/ApJ/725/2270 : Mid-IR emission lines in AGNs (Pereira-Santaella+, 2010)
J/ApJ/723/993 : Spatial extent of (U)LIRGs in the MIR. I. (Diaz-Santos+, 2010)
J/ApJS/190/233 : Spectroscopy & abundances of SINGS galaxies (Moustakas+, 2010)
J/ApJ/715/572 : GOALS UV and FIR properties (Howell+, 2010)
J/ApJ/709/1257 : Spitzer-IRS spectra of Seyfert galaxies. II. (Tommasin+, 2010)
J/ApJ/709/884 : Role of starburst-AGN composites in LIRG mergers (Yuan+, 2010)
J/ApJS/184/230 : Spitzer high-res. MIR spectral atlas (Bernard-Salas+, 2009)
J/ApJS/182/628 : Spitzer quasar and ULIRG evolution study (Veilleux+, 2009)
J/ApJ/693/1821 : The Spitzer infrared nearby galaxies survey (Dale+, 2009)
J/ApJ/674/172 : Oxygen abundances of LIRGs and ULIRGs (Rupke+, 2008)
J/ApJ/658/778 : Spitzer mid-IR spectroscopy of z∼2 ULIRGs (Yan+, 2007)
J/ApJ/656/770 : Mid-IR spectrum of star-forming galaxies (Smith+, 2007)
J/A+A/467/565 : z=1-3 ULIRGs from the Spitzer SWIRE survey (Berta+, 2007)
J/ApJ/646/161 : Classification of IR galaxies (Dale+, 2006)
J/AJ/132/2596 : Spectroscopy of Ultraluminous IR galaxies (Darling+, 2006)
J/AJ/126/1607 : IRAS Revised Bright Galaxy Sample (Sanders+, 2003)
J/ApJS/143/315 : IRAS 1Jy sample of ULIRGs. II. (Veilleux+, 2002)
J/AJ/109/960 : Young star clusters in The Antennae (Whitmore+ 1995)
http://goals.ipac.caltech.edu/ : GOALS home page
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name Object name
19- 20 I2 h RA1h Hour of Right Ascension (J2000) (G1)
22- 23 I2 min RA1m Minute of Right Ascension (J2000) (G1)
25- 30 F6.3 s RA1s Second of Right Ascension (J2000) (G1)
32 A1 --- DE1- Sign of the Declination (J2000)(G1)
33- 34 I2 deg DE1d Degree of Declination (J2000) (G1)
36- 37 I2 arcmin DE1m Arcminute of Declination (J2000) (G1)
39- 44 F6.3 arcsec DE1s Arcsecond of Declination (J2000) (G1)
46- 55 F10.5 deg PA1 [-176/180] Short-High Position Angle
57 A1 --- l_[SIV] Limit flag on [SIV]
58- 63 F6.2 10-17W/m2 [SIV] The [S IV] 10.5µm line flux (G2)
65- 69 F5.2 10-17W/m2 e_[SIV] ? Uncertainty in [SIV]
71 A1 --- l_[NeII] Limit flag on [Ne II]
72- 77 F6.2 10-17W/m2 [NeII] [0.6/682] The [NeII] 12.8um line flux (G2)
79- 83 F5.2 10-17W/m2 e_[NeII] [0.03/14]? Uncertainty in [NeII]
85 A1 --- l_[NeV] Limit flag on [NeV]
86- 91 F6.2 10-17W/m2 [NeV] [0.1/899] The [NeV] 14.3um line flux (G2)
93- 97 F5.2 10-17W/m2 e_[NeV] [0.06/13]? Uncertainty in [NeV]
99 A1 --- l_[NeIII] Limit flag on [NeIII]
100-106 F7.2 10-17W/m2 [NeIII] [0.2/1371] The [NeIII] 15.6um line flux (G2)
108-112 F5.2 10-17W/m2 e_[NeIII] [0.04/11]? Uncertainty in [NeIII]
114 A1 --- l_[SIII] Limit flag on [SIII]
115-120 F6.2 10-17W/m2 [SIII] [0.6/241]? The [SIII] 18.7um line flux (G2)
122-126 F5.2 10-17W/m2 e_[SIII] [0.07/14]? Uncertainty in [SIII]
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name Object name
19- 20 I2 h RA2h Hour of Right Ascension (J2000) (G1)
22- 23 I2 min RA2m Minute of Right Ascension (J2000) (G1)
25- 30 F6.3 s RA2s Second of Right Ascension (J2000) (G1)
32 A1 --- DE2- Sign of the Declination (J2000)(G1)
33- 34 I2 deg DE2d Degree of Declination (J2000) (G1)
36- 37 I2 arcmin DE2m Arcminute of Declination (J2000) (G1)
39- 44 F6.3 arcsec DE2s Arcsecond of Declination (J2000) (G1)
46- 55 F10.5 deg PA2 [-180/176] Long-High Position Angle
57 A1 --- l_[SIII]a Limit flag on [SIII]a
58- 64 F7.2 10-17W/m2 [SIII]a [0.3/111]? The [SIII] 18.7um line flux (G2)
66- 70 F5.2 10-17W/m2 e_[SIII]a [0.1/11]? Uncertainty in [SIII]a
72 A1 --- l_[OIV] Limit flag on [OIV]
73- 79 F7.2 10-17W/m2 [OIV] The [O IV] 25.9µm line flux (G2)
81- 85 F5.2 10-17W/m2 e_[OIV] ? Uncertainty in [OIV]
87 A1 --- l_[FeII] Limit flag on [FeII]
88- 96 F9.2 10-17W/m2 [FeII] The [Fe II] 26.0µm line flux (G2)
98-102 F5.2 10-17W/m2 e_[FeII] ? Uncertainty in [FeII]
104 A1 --- l_[SIII]b Limit flag on [SIII]b
105-111 F7.2 10-17W/m2 [SIII]b [0.9/774] The [SIII] 33.48um line flux (G2)
113-117 F5.2 10-17W/m2 e_[SIII]b [0.2/26.2]? Uncertainty in [SIII]b
119 A1 --- l_[SiII] Limit flag on [SiII]
120-126 F7.2 10-17W/m2 [SiII] ? The [Si II] 34.8µm line flux (G2)
128-132 F5.2 10-17W/m2 e_[SiII] ? Uncertainty in [SiII]
134-139 F6.2 10+10Lsun L24 [0.02/110]? The 24µm luminosity (G2)
141-144 F4.2 10+10Lsun e_L24 [0.01/3.2]? Uncertainty in L24
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name Object name
19- 21 I3 km/s [NeII] [336/797]? The [Ne II] 12.8um line width (1)
23- 24 I2 km/s e_[NeII] [24/80]? Uncertainty in [NeII]
26- 28 I3 km/s [NeIII] [325/794]? The [Ne III] 15.6um line width (1)
30- 32 I3 km/s e_[NeIII] [23/139]? Uncertainty in [NeIII]
34- 36 I3 km/s [NeV] [314/785]? The [Ne V] 14.3um line width (1)
38- 40 I3 km/s e_[NeV] [41/134]? Uncertainty in [NeV]
--------------------------------------------------------------------------------
Note (1): Resolved neon emission line widths for the 80 sources which show at
least one resolved neon emission line features. Intrinsic linewidths
are corrected for instrumental broadening. See text for a full
description.
--------------------------------------------------------------------------------
Global notes:
Note (G1): Of the center of the slit (Short-High or Long-High spectra).
Note (G2): Sources without line fluxes or upper limits were either not observed
with the Short-High/Long-High module, or they have lines that fall
outside the Short-High/Long-High bandpass.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Apr-2015