J/ApJ/730/19 IR spectra and SEDs for starbursts and AGNs (Sargsyan+, 2011)
Infrared spectra and spectral energy distributions for dusty starbursts and active galactic nuclei. Sargsyan L., Weedman D., Lebouteiller V., Houck J., Barry D., Hovhannisyan A., Mickaelian A. <Astrophys. J., 730, 19 (2011)> =2011ApJ...730...19S
ADC_Keywords: Active gal. nuclei ; Spectra, infrared ; Galaxies, IR ; Equivalent widths ; Photometry, infrared Keywords: galaxies: active - galaxies: distances and redshifts - galaxies: evolution - galaxies: starburst - infrared: galaxies Abstract: We present spectroscopic results for all galaxies observed with the Spitzer Infrared Spectrograph (IRS) that also have total infrared fluxes fIR measured with the Infrared Astronomical Satellite (IRAS), also using AKARI photometry when available. Infrared luminosities and spectral energy distributions (SEDs) from 8um to 160um are compared to polycyclic aromatic hydrocarbon emission from starburst galaxies or mid-infrared dust continuum from active galactic nuclei (AGNs) at rest-frame wavelengths ∼8um. A total of 301 spectra are analyzed for which IRS and IRAS include the same unresolved source, as measured by the ratio fν(IRAS 25um)/fν(IRS 25um). Sources have 0.004<z<0.34 and 42.5<logLIR<46.8(erg/s) and cover the full range of starburst galaxy and AGN classifications. Description: All sources were observed with the Spitzer/IRS using the low-resolution modules short low 1 (SL1), short low 2 (SL2), long low 1 (LL1), and long low 2 (LL2), giving spectral coverage from ∼5um to ∼35um. We assemble and analyze a collection of 301 sources which have both IRS spectra and IRAS photometry; when available, photometry extending to 160um is also used from the AKARI mission (Murakami et al. 2007PASJ...59S.369M; Onaka et al. 2007PASJ...59S.401O; Kawada et al. 2007PASJ...59S.389K; Kaneda et al. 2007PASJ...59S.423K). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 121 51 Spectroscopic properties of starbursts table2.dat 124 51 SEDs and total luminosities of starbursts table3.dat 121 79 Spectroscopic properties of composite sources table4.dat 124 79 SEDs and total luminosities of composite sources table5.dat 121 171 Spectroscopic properties of AGN table6.dat 124 171 SEDs and total luminosities of AGN
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989) J/MNRAS/414/500 : Spitzer/IRS ATLAS project source (Hernan-Caballero+, 2011) J/MNRAS/409/2 : Herschel sources SED model parameters (Rowan-Robinson+, 2011) J/ApJ/713/970 : SED templates for AGNs and galaxies (Assef+, 2010) J/ApJS/187/64 : The simultaneous optical-to-X-ray SED of AGNs (Grupe+, 2010) J/ApJ/709/884 : Starburst-AGN composites in LIRG mergers (Yuan+, 2010) J/ApJ/719/1191 : Mid-IR indicators of SF and AGN in galaxies (Treyer+, 2010) J/ApJ/697/182 : Dust emission from unobscured AGN (Thompson+, 2009) J/ApJ/684/136 : SEDs of ELAIS-S1 mid-IR sources (Gruppioni+, 2008) J/ApJ/683/114 : IRS spectra of faint IRAS sources (Sargsyan+, 2008) J/ApJ/663/81 : SED of hard X-ray selected AGN in XMDS (Polletta+, 2007) J/ApJ/619/755 : Modeling starburst SEDs (Dopita+, 2005) J/ApJS/158/139 : Atlas of warm AGN and starbursts (Keel+, 2005) http://www.sdss.org/ : SDSS home page Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Source number 5- 28 A24 --- Name Source name (G1) 30- 41 A12 --- IRAS IRAS FSC catalog name (FHHMMm+DDMMA; B1950; Cat. II/156) 43- 44 I2 h RAh Hour of Right Ascension (J2000) 46- 47 I2 min RAm Minute of Right Ascension (J2000) 49- 53 F5.2 s RAs Second of Right Ascension (J2000) 55 A1 --- DE- Sign of the Declination (J2000) 56- 57 I2 deg DEd Degree of Declination (J2000) 59- 60 I2 arcmin DEm Arcminute of Declination (J2000) 62- 65 F4.1 arcsec DEs Arcsecond of Declination (J2000) 67- 72 F6.4 --- z NED optical redshift 74 A1 --- f_z [a] a: from Spitzer/IRS spectrum 76- 81 A6 --- SDSS Optical classification from SDSS spectra (agn, comp, sb or em+abs) (1) 83 A1 --- l_EW6.2 Limit flag on EW6.2 85- 89 F5.3 um EW6.2 PAH 6.2µm feature rest frame equivalent width (2) 91 A1 --- l_F6.2 Limit flag on F6.2 92- 97 F6.2 10-16W/m2 F6.2 Total PAH 6.2µm feature flux (2) 99 A1 --- l_F11.3 Limit flag on F11.3 100-105 F6.2 10-16W/m2 F11.3 ? Total PAH 11.3µm feature flux (2) 107-112 F6.1 mJy F7.7 Flux density at 7.7µm 114 A1 --- f_F7.7 [f] F7.7 measured at 7.9µm (3) 116-119 F4.2 --- SStr ? Silicate feature strength, only for AGNs (4) 121 A1 --- f_SStr [P] PAH emission + silicate absorption (5)
Note (1): Determined from presence of broad hydrogen emission lines or ratios among [OIII] (5007), Hβ, [NII] (6584), and Hα. Note (2): Fit with single gaussian on a linear continuum within rest wavelength range 5.5µm to 6.9µm and 10.5µm to 12.0µm for the 6.2µm and 11.3µm features, respectively. Note (3): f = fν(7.9µm) measured because continuum stronger than PAH peak fν(7.7µm). Note (4): Strength of silicate feature defined as fν(10µm,observed)/fν(10µm,continuum), for fν(10µm,continuum) extrapolated linearly between fν(7.9µm) and fν(13µm). Values >1 correspond to silicate emission and values <1 to silicate absorption. Note (5): P = Both PAH emission and silicate absorption are present; Absorption strength is not measured because continuum level at 7.9µm cannot be reliably determined.
Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Source number 5- 16 A12 --- IRAS IRAS FSC name (FHHMMm+DDMMA; B1950) (G1) 19- 24 F6.3 Jy F25-S Spitzer/IRS 25µm flux density 26- 30 F5.3 Jy F8 ? AKARI 8µm flux density 32- 36 F5.3 Jy F12 IRAS 12µm flux density 38- 42 F5.3 Jy F18 ? AKARI 18µm flux density 44- 49 F6.3 Jy F25-I IRAS 25µm flux density 51- 57 F7.3 Jy F60 IRAS 60µm flux density 59- 65 F7.3 Jy F65 ? AKARI 65µm flux density 67- 73 F7.3 Jy F90 ? AKARI 90µm flux density 75- 81 F7.3 Jy F100 IRAS 100µm flux density 83- 88 F6.3 Jy F140 ? AKARI 140µm flux density 90- 96 F7.3 Jy F160 ? AKARI 160µm flux density 98-103 F6.2 mJy F1.25 ? 2MASS 1.25µm (J) flux density 105-110 F6.2 mJy F1.66 ? 2MASS 1.66µm (H) flux density 112-116 F5.2 --- Ratio Ratio of far-IR to 7.7µm (6) 118 A1 --- f_Ratio [fg] 7.9µm used (7) 120-124 F5.2 [10-7W] logL Log of total IR luminosity; erg/s (8)
Note (6): Where R=fIR/νfν(7.7microns), for f(IR)=1.8e-11*[13.48fν(12)+5.16fν(25)+2.58fν(60) + fν(100)] in erg/cm2/s. Note (7): f = fν(7.9microns) measured because continuum stronger than PAH peak fν(7.7microns). g = Unique object, having highest value of R accompanied by unusually low LIR; no SDSS spectrum but optical image resembles a Blue Compact Dwarf (BCD). See also Bite (G1) below. Note (8): Where LIR=4πD2fIR for D the luminosity distance determined for H0=71km/s/Mpc, ΩM=0.27 and ΩΛ=0.73, from Wright (2006PASP..118.1711W): http://www.astro.ucla.edu/~wright/CosmoCalc.html.
Global notes: Note (G1): In table 5 and 6, source #139 (IRASF17341+5704) is a unique object having optical classification like Blue Compact Dwarf (BCD) with narrow optical emission lines, strong [OIII]/Hβ and very strong Hα/[NII]. Also it has a weak PAH and optical spectrum like low luminosity BCD (e.g. Hunt et al. 2010ApJ...712..164H), but LIR compares to normal starburst and AGN.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 14-Sep-2012
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