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
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:
FileName Lrecl Records Explanations
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 92 93 Derived quantities - resolved components
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
Bytes Format Units Label Explanations
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) 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).
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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
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); see the text for details.
Byte-by-byte Description of file: table.dat
Bytes Format Units Label Explanations
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)
Note (4): The UV continuum slope β(GALEX) was calculated according to the definition of Kong et al. (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.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 16-May-2012
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