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 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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
10- 15 F6.3 Mpc Dist Distance from SINGS (Kennicutt et al.
2003PASP..115..928K 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)
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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.
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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- 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 aW/m2 F(Ha) Hα flux (in 10-15arg/cm2/s = aW/m2)
30- 34 F5.1 aW/m2 e_F(Ha) 1σ uncertainty in F(Ha)
36- 43 F8.2 aW/m2 F(Hb) Hβ flux
45- 49 F5.2 aW/m2 e_F(Hb) 1σ uncertainty in F(Hb)
51- 55 F5.2 Jy S25 IRAS 25 micron flux density
57- 61 F5.3 Jy e_S25 1σ uncertainty in S25
63- 67 F5.2 Jy S60 IRAS 60 micron flux density
69- 73 F5.3 Jy e_S60 1σ uncertainty in S60
75- 80 F6.2 Jy S100 IRAS 100 micron flux density
82- 86 F5.3 Jy e_S100 1σ uncertainty in S100
88- 93 F6.1 mJy S1.4 ? The 1.4GHz flux density
95- 99 F5.1 mJy e_S1.4 ? The 1σ uncertainty in S1.4 (1)
101-103 I3 --- Ref Reference on IRAS fluxes (see refs.dat file)
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Note (1): Source with a 1.4GHz flux density but no uncertainty are taken
from Condon (1987, Cat. J/ApJS/65/485). No uncertainties were given in
that paper.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Ref Reference number
5- 23 A19 --- BibCode Bibcode
25- 45 A21 --- Aut Auhtor's name(s)
48- 94 A47 --- Comm Comment
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 27-Oct-2011