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J/ApJ/703/1672   Far-IR and Hα fluxes in galaxies   (Kennicutt+, 2009)

Dust-corrected star formation rates of galaxies. I. Combinations of Hα and infrared tracers. Kennicutt R.C., Hao C.-N., Calzetti D., Moustakas J., Dale D.A., Bendo G., Engelbracht C.W., Johnson B.D., Lee J.C. <Astrophys. J., 703, 1672-1695 (2009)> =2009ApJ...703.1672K
ADC_Keywords: Galaxies, nearby ; Photometry, infrared Keywords: dust, extinction - galaxies: evolution - galaxies: ISM - H II regions - stars: formation Abstract: We combine Hα emission-line and infrared (IR) continuum measurements of two samples of nearby galaxies to derive dust attenuation-corrected star formation rates (SFRs). We use a simple energy balance based method that has been applied previously to HII regions in the Spitzer Infrared Nearby Galaxies Survey, and extend the methodology to integrated measurements of galaxies. We find that our composite Hα+IR based SFRs are in excellent agreement with attenuation-corrected SFRs derived from integrated spectrophotometry, over the full range of SFRs (0.01-80M/yr) and attenuations (0-2.5mag) studied. The calibrations differ significantly from those obtained for HII regions, with the difference attributable to a more evolved population of stars heating the dust. Our results are consistent with a significant component of diffuse dust (the "IR cirrus" component) that is heated by a non-star-forming population. Description: Our samples are drawn from two surveys of nearby galaxies, the SINGS survey (Kennicutt et al. 2003PASP..115..928K) and a survey of integrated spectrophotometry of 417 galaxies by Moustakas & Kennicutt (2006, Cat. J/ApJS/164/81). Integrated Hα fluxes and Hα/Hβ flux ratios for the MK06 sample were taken directly from the integrated spectra. The galaxies were observed with the B&C Spectrograph on the Steward Observatory Bok 2.3m telescope. Drift-scanned spectra were also obtained for the SINGS sample, using the same instrument and setup as MK06 for northern galaxies, and the R-C spectrograph on the Cerro Tololo Inter-American Observatory (CTIO) 1.5m telescope for a handful of galaxies that could not be reached from Kitt Peak. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 123 58 Integrated measurements of SINGS galaxies table2.dat 103 113 Integrated measurements of Moustakas & Kennicutt (2006, Cat. J/ApJS/164/81) sample refs.dat 94 29 References
See also: VII/161 : Nearby Galaxies (Schmidt+ 1993) II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989) VII/109 : IRAS Observations of Large Optical Galaxies (Rice+, 1988) VII/75 : IR photometry and 21cm data for nearby galaxies (Aaronson+, 1982) J/ApJS/190/233 : Spectroscopy and abundances of SINGS galaxies (Moustakas+, 2010) J/ApJ/701/1965 : Radial dust properties of SINGS galaxies (Munoz-Mateos+, 2009) J/ApJ/703/1569 : Radial distribution in SINGS galaxies. I. (Munoz-Mateos+, 2009) J/ApJS/178/247 : Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008) J/ApJ/669/959 : Warm molecular hydrogen in SINGS galaxies (Roussel+, 2007) J/ApJS/164/81 : Spectrophotometry of nearby galaxies (Moustakas+, 2006) J/AJ/126/1607 : IRAS Revised Bright Galaxy Sample (Sanders+, 2003) J/ApJS/146/353 : Circumnuclear dust in galaxies (Martini+, 2003) J/ApJ/513/168 : HST observations of carbon in spiral galaxies (Garnett+, 1999) J/ApJ/510/104 : Ionizing Stars of Extragalactic H II Regions (Bresolin+ 1999) J/AJ/116/2805 : H II regions in spiral galaxies (Van Zee+, 1998) J/A+AS/91/285 : HII galaxies spectrophotometric catalogue (Terlevich+, 1991) J/ApJS/65/485 : 1.49GHz Atlas of Spiral Galaxies (Condon, 1987) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Galaxy name 10- 15 F6.3 Mpc Dist Distance from SINGS (Kennicutt et al. 2003PASP..115..928K) 17- 22 F6.2 [mW/m2] log(Ha+N) Hα+[NII] flux (in erg/s/cm2) 24- 27 F4.2 [mW/m2] e_log(Ha+N) ? 1σ uncertainty in log(Ha+NII) 28 A1 --- n_log(Ha+N) [ab] why e_log(Ha+NII) is missing (1) 30- 34 F5.3 --- Ha/Hb Hα/Hβ flux ratio 36- 40 F5.3 --- e_Ha/Hb The 1σ uncertainty in Ha/Hb 41 A1 --- f_Ha/Hb [c] Assumed value of Ha/Hb (2) 43- 47 F5.3 --- NII/Ha NII/Hα flux ratio 49- 53 F5.3 --- e_NII/Ha 1σ uncertainty in NII/Ha 55- 59 F5.2 Jy S25 ? 25 micron flux density 61- 65 F5.3 Jy e_S25 ? 1σ uncertainty in S25 67- 72 F6.2 Jy S60 ? 60 micron flux density 74- 78 F5.3 Jy e_S60 ? 1σ uncertainty in S60 80- 85 F6.2 Jy S100 ? 100 micron flux density 87- 92 F6.3 Jy e_S100 ? 1σ uncertainty in S100 94-102 A9 --- r_Ha/Hb Reference(s) on Ha/Hb flux ratio (see refs.dat file; 'a' = assumed value 105-115 A11 --- r_NII/Ha Reference(s) on NII/Ha flux ratio (see refs.dat file) 117-123 A7 --- Ref Reference(s) on IRAS fluxes (see refs.dat file)
Note (1): Flag as follows: a = No error was given in the original paper. b = This value is from R. C. Kennicutt et al. 2009 (in preparation). No error was given. Note (2): c= They are low metallicity galaxies. The Hα/Hβ ratio is assumed to be 2.86 so that the estimated extinction is zero under the Case B assumption made in this paper. The error is the median error of the remaining galaxies.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Name Galaxy name 16- 20 F5.1 Mpc Dist Distance from Moustakas & Kennicutt (2006, Cat. J/ApJS/164/81) 22- 28 F7.1
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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