J/ApJ/715/572 GOALS UV and FIR properties (Howell+, 2010)
The Great Observatories All-sky LIRG Survey: comparison of ultraviolet and
far-infrared properties.
Howell J.H., Armus L., Mazzarella J.M., Evans A.S., Surace J.A.,
Sanders D.B., Petric A., Appleton P., Bothun G., Bridge C., Chan B.H.P.,
Charmandaris V., Frayer D.T., Haan S., Inami H., Kim D.-C., Lord S.,
Madore B.F., Melbourne J., Schulz B., U V., Vavilkin T., Veilleux S., Xu K.
<Astrophys. J., 715, 572-588 (2010)>
=2010ApJ...715..572H 2010ApJ...715..572H
ADC_Keywords: Galaxies, IR ; Photometry, ultraviolet
Keywords: infrared: galaxies - ultraviolet: galaxies
Abstract:
The Great Observatories All-sky LIRG Survey (GOALS) consists of a
complete sample of 202 luminous infrared galaxies (LIRGs) selected
from the IRAS Revised Bright Galaxy Sample (RBGS; Sanders et al. 2003,
Cat. J/AJ/126/1607). The galaxies span the full range of interaction
stages, from isolated galaxies to interacting pairs to late stage
mergers. We present a comparison of the UV and infrared properties of
135 galaxies in GOALS observed by GALEX and Spitzer. For interacting
galaxies with separations greater than the resolution of GALEX and
Spitzer (∼2"-6"), we assess the UV and IR properties of each galaxy
individually. The contribution of the FUV to the measured star
formation rate (SFR) ranges from 0.2% to 17.9%, with a median of 2.8%
and a mean of 4.0±0.4%. The specific star formation rate (SSFR) of
the GOALS sample is extremely high, with a median value
(3.9x10-10/yr) that is comparable to the highest SSFRs seen in the
Spitzer Infrared Nearby Galaxies Survey sample. We examine the
position of each galaxy on the IR excess-UV slope (IRX-β) diagram
as a function of galaxy properties, including IR luminosity and
interaction stage.
Description:
The GOALS GALEX sample consists of 135 systems observed as part of
GALEX Cycle 1 program No. 13 (PI: Mazzarella), GALEX Cycle 5 program
No. 38 (PI: Howell), the Nearby Galaxy Survey (NGS), and the All Sky
Survey (AIS). All systems have been observed in both the FUV
(λeff=1528Å) and NUV (λeff=2271Å).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 135 GOALS GALEX photometry - integrated systems
table2.dat 108 93 GALEX photometry - resolved components
table3.dat 92 130 Derived quantities - integrated systems
table4.dat 84 93 Derived quantities - resolved components
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See also:
J/AJ/126/1607 : IRAS Revised Bright Galaxy Sample (Sanders+, 2003)
J/AJ/127/3235 : HIRES atlas of all RBGS galaxies (Surace+, 2004)
J/ApJS/164/38 : UV and FIR properties of nearby galaxies (Iglesias-Paramo+,
2006)
J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+, 2007)
J/ApJ/701/1398 : SFR for starburst galaxies (Sargsyan+, 2009)
J/ApJ/706/553 : Fluxes in nearby star-forming galaxies (Boquien+, 2009)
J/ApJS/193/30 : UV-to-FIR analysis of sources in the EGS. II. (Barro+, 2011)
J/ApJ/741/79 : The Spitzer-SDSS-GALEX Spectroscopic Survey (O'Dowd+, 2011)
J/ApJS/199/22 : UV to far-IR catalog of galaxies (Hernandez-Fernandez+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Sys System name (1)
18- 33 A16 --- AName Alternate system name
35- 36 I2 h RAh NED Hour of right ascension (J2000) (2)
38- 39 I2 min RAm NED Minute of right ascension (J2000)
41- 45 F5.2 s RAs NED Second of right ascension (J2000)
47 A1 --- DE- NED Sign of declination (J2000) (2)
48- 49 I2 deg DEd NED Degree of declination (J2000) (2)
51- 52 I2 arcmin DEm NED Arcminute of declination (J2000)
54- 57 F4.1 arcsec DEs NED Arcsecond of declination (J2000)
59- 63 F5.2 [Lsun] logLIR Total infrared luminosity (3)
65- 72 F8.2 s tFUV GALEX FUV integration time
74- 81 E8.3 cW/m2/nm fFUV ? GALEX FUV (1528Å) flux density in units
of erg/s/cm2/Å
83- 88 E6.1 cW/m2/nm e_fFUV ? GALEX FUV flux density uncertainty
90- 97 F8.2 s tNUV GALEX NUV integration time
99-106 E8.3 cW/m2/nm fNUV ? GALEX NUV (2271Å) flux density in units
of erg/s/cm2/Å
108-113 E6.1 cW/m2/nm e_fNUV ? GALEX NUV flux density uncertainty
-------------------------------------------------------------------------------
Note (1): System name, following the naming convention of Armus et al.
(2009PASP..121..559A 2009PASP..121..559A)
Note (2): The best available source right ascension (J2000) and declination
(J2000) in NED as of 2008 October.
Note (3): The total infrared luminosity in log10 Solar units computed using
the IRAS flux densities reported in the RBGS (Sanders et al. 2003,
Cat. J/AJ/126/1607) and the luminosity distances in Armus et al.
(2009PASP..121..559A 2009PASP..121..559A).
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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- 22 A22 --- Sys System name
24- 46 A23 --- Name Galaxy name
48- 49 I2 h RAh Hour of right ascension (J2000) (1)
51- 52 I2 min RAm Minute of right ascension (J2000)
54- 58 F5.2 s RAs Second of right ascension (J2000)
60 A1 --- DE- Sign of declination (J2000) (1)
61- 62 I2 deg DEd Degree of declination (J2000) (1)
64- 65 I2 arcmin DEm Arcminute of declination (J2000)
67- 70 F4.1 arcsec DEs Arcsecond of declination (J2000)
72- 76 F5.2 [Lsun] logLIR ? Infrared luminosity (2)
78- 85 E8.3 cW/m2/nm fFUV ? GALEX FUV (1528Å) flux density in units
of erg/s/cm2/Å
87- 92 E6.1 cW/m2/nm e_fFUV ? GALEX FUV flux density uncertainty
94-101 E8.3 cW/m2/nm fNUV ? GALEX NUV (2271Å) flux density in units
of erg/s/cm2/Å
103-108 E6.1 cW/m2/nm e_fNUV ? GALEX NUV flux density uncertainty
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Note (1): The right ascension (J2000) and the declination (J2000) of the IRAC
8um centroid in J. Mazzarella et al. (2010, in preparation).
Note (2): The infrared luminosity in log10 Solar units computed using the
MIPS flux densities reported in J. Mazzarella et al. (2010, in
preparation) and the luminosity distances in Armus et al.
(2009PASP..121..559A 2009PASP..121..559A); see the text for details.
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- Name System (in table3) or Galaxy (in table4) name
25- 29 F5.2 [Lsun] logLFUV ? Total FUV luminosity in log10 Solar units
31- 36 F6.3 --- beta ? The UV continuum slope β(GALEX) (4)
38- 44 F7.3 --- e_beta ? β(GALEX) uncertainty
46- 50 F5.3 --- IRX ? Ratio of IR to FUV flux (5)
52- 57 F6.3 --- e_IRX ? IRX uncertainty
59- 66 E8.3 Msun Mass ? Stellar mass (6)
68 A1 --- l_SFR [<] Limit flag on SFR (7)
69- 74 F6.2 Msun/yr SFR ? Star formation rate calculated as described
in section 3.2
76 A1 --- l_sSFR [<] Limit flag on sSFR (7)
77- 84 E8.3 yr-1 sSFR ? Specific star formation rate (SFR per unit
mass) calculated as described in section 3.2
86- 92 F7.1 --- IR/UV ? IR/UV ratio (only for table 3) (8)
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Note (4): The UV continuum slope β(GALEX) was calculated according to
the definition of Kong et al. (2004MNRAS.349..769K 2004MNRAS.349..769K):
β(GALEX)=(log(fFUV)-log(fNUV))/-0.182 where fFUV and fNUV
are the mean flux densities per unit wavelength. See section 3.1 for
further details.
Note (5): The infrared excess IRX is defined as the ratio of IR to FUV
flux, most commonly expressed in logarithmic units. When calculating
IRX we use LIR, the total IR luminosity from 8 to 1000um. LIR is
calculated using IRAS flux densities for integrated systems, and is
allocated among resolved galaxies using MIPS flux density ratios. See
section 3.1 for further details.
Note (6): The mass estimates derived from 2MASS K-band data were used where
possible. For the galaxies without reliable K-band photometry, the
masses estimated from IRAC 3.6um data were scaled by the median ratio
of mass(K)/mass(3.6) from galaxies measured at both wavelengths.
Note (7): Values indicated by limit flags should be considered upper limits
due to possible AGN contamination.
Note (8): The IR/UV ratio, a useful observational measure of dust
extinction, is defined as IR/UV=LIR/nuLnu(FUV)+nuLnu(NUV) and ranges
from 5.8 to 813, with a median of 39. See section 3.2 for further
details.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 16-May-2012