J/ApJS/192/6 A GALEX UV imaging survey of nearby galaxies (Lee+, 2011)
A GALEX ultraviolet imaging survey of galaxies in the local volume. Lee J.C., Gil de Paz A., Kennicutt R.C.Jr, Bothwell M., Dalcanton J., Funes S.J.J.G., Johnson B.D., Sakai S., Skillman E., Tremonti C., van Zee L. <Astrophys. J. Suppl. Ser., 192, 6 (2011)> =2011ApJS..192....6L
ADC_Keywords: Galaxies, nearby ; Ultraviolet ; Surveys ; Magnitudes Keywords: catalogs - galaxies: dwarf - galaxies: evolution - stars: formation - surveys - ultraviolet: galaxies Abstract: We present results from a GALEX ultraviolet (UV) survey of a complete sample of 390 galaxies within ∼11Mpc of the Milky Way. The UV data are a key component of the composite Local Volume Legacy, an ultraviolet-to-infrared imaging program designed to provide an inventory of dust and star formation in nearby spiral and irregular galaxies. The ensemble data set is an especially valuable resource for studying star formation in dwarf galaxies, which comprise over 80% of the sample. We describe the GALEX survey programs that obtained the data and provide a catalog of far-UV (∼1500Å) and near-UV (∼2200Å) integrated photometry. General UV properties of the sample are briefly discussed. We compute two measures of the global star formation efficiency, the star formation rate (SFR) per unit HI gas mass, and the SFR per unit stellar mass, to illustrate the significant differences that can arise in our understanding of dwarf galaxies when the FUV is used to measure the SFR instead of Hα. Description: The Local Volume galaxies that were targeted for GALEX imaging were mainly selected from the sample given in Kennicutt et al. (Paper I, 2008, Cat. J/ApJS/178/247). The ACS Nearby Galaxy Survey Treasury (ANGST) program (Dalcanton et al. 2009ApJS..183...67D), which has obtained HST ACS and WFPC2 imaging for a ∼4Mpc volume-limited sample, contains about 20 low-luminosity and/or early-type galaxies that were not already included in Paper I, and GALEX data were also obtained for these objects. Observations of the 11HUGS GALEX Legacy program (GI1_047, GI4_095) galaxies have also been extended into the infrared using the Spitzer Space Telescope as part of the Local Volume Legacy survey (Dale et al. 2009ApJ...703..517D). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 135 463 GALEX observations of local volume galaxies table2.dat 97 463 GALEX aperture and asymptotic magnitudes table3.dat 56 258 GALEX photometry in Spitzer Local Volume Legacy survey (LVL) apertures
See also: J/ApJS/178/247 : Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008) J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+, 2007) J/ApJS/173/441 : UV-Luminous galaxies discovered by GALEX (Hoopes+, 2007) J/MNRAS/300/303 : UV-selected galaxy redshift survey (Treyer+, 1998) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1 A1 --- S [S] Supplement galaxy (G1) 2- 4 I03 --- Seq Running index number (G1) 6- 19 A14 --- Name Galaxy name 21- 22 I2 h RAh NED Hour of Right Ascension (J2000) 24- 25 I2 min RAm NED Minute of Right Ascension (J2000) 27- 30 F4.1 s RAs NED Second of Right Ascension (J2000) 32 A1 --- DE- Sign of the Declination (J2000) 33- 34 I2 deg DEd NED Degree of Declination (J2000) 36- 37 I2 arcmin DEm NED Arcminute of Declinaiton (J2000) 39- 40 I2 arcsec DEs NED Arcsecond of Declination (J2000) 42- 47 F6.2 deg GLAT NED Galactic latitude 49- 53 F5.2 Mpc Dist Adopted distance (1) 55- 61 A7 --- n_Dist Determination method for Dist (2) 63- 67 F5.2 mag Bmag B band magnitude 69- 70 I2 --- TT RC3 morphology type 72 I1 --- LVL [0/1] in Spitzer Local Volume Legacy program (1=yes, 0=no) 74- 78 I5 s tFUV ? GALEX/FUV cumulative exposure time 80- 84 I5 s tNUV ? GALEX/NUV cumulative exposure time 86-135 A50 --- Tname GALEX tile name
Note (1): Measurements based on standard candles or secondary distance indicators were compiled from the literature when available, otherwise distances computed from recessional velocities corrected to the centroid of the Local Group (following Karachentsev & Makarov 1996AJ....111..794K, as reported in NED) and adopting H0=75km/s/Mpc are listed. Original references for the direct distances are given in Paper I, Table 1 (Kennicutt et al., 2008, Cat. J/ApJS/178/247), with the exception of galaxies targeted by the ANGST program, for which non-Cepheid distances have been updated to be consistent with the tip of the red giant branch measurements reported in Dalcanton et al. (2009ApJS..183...67D). Note (2): Methods as follows: ceph = Cepheid variables; trgb = tip of the red giant branch; sbf = surface brightness fluctuations; mem = membership in a group with measured distance; bs = brightest blue stars; tf = Tully-Fisher relation; flow = Local Group corrected recessional velocity distances.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1 A1 --- S [S] Supplement galaxy (G1) 2- 4 I03 --- Seq Running index number (G1) 6- 19 A14 --- Name Galaxy name 21- 24 F4.2 mag E(B-V) Schlegel et al. 1998 E(B-V) value 26- 29 I4 arcsec MajAxis ? Major axis (3) 31- 34 I4 arcsec MinAxis ? Minor axis (3) 36- 38 I3 deg PA [-90/90]? Position angle (3) 40 A1 --- l_FUV The 3σ upper-limit flag on FUV 42- 46 F5.2 mag FUV ? GALEX/FUV band aperture magnitude (4) 48- 51 F4.2 mag e_FUV ? Uncertainty in FUV (5) 53 A1 --- l_NUV The 3σ upper-limit flag on NUV 55- 59 F5.2 mag NUV ? GALEX/NUV band aperture magnitude (4) 61- 64 F4.2 mag e_NUV ? Uncertainty in NUV (5) 66- 70 F5.2 mag F-N ? Milky Way extinction corrected (FUV-NUV) color index 72- 75 F4.2 mag e_F-N ? Uncertainty in F-N 77- 81 F5.2 mag FUVas ? GALEX/FUV band asymptotic magnitude (6) 83- 86 F4.2 mag e_FUVas ? Uncertainty in FUVasg (7) 88- 92 F5.2 mag NUVas ? GALEX/FUV band asymptotic magnitude (6) 94- 97 F4.2 mag e_NUVas ? Uncertainty in NUVasg (7)
Note (3): Of the outermost elliptical annulus where both FUV and NUV surface photometry can be performed. We define this as the distance beyond which the annular flux error becomes larger than 0.8mag, or where the intensity falls below that of the sky background in both FUV and NUV bands, which ever occurs first. Note (4): Measured in the common elliptical aperture described by the preceding columns. Corrections for Milky Way foreground extinction have been applied using the E(B-V) values listed here, and the Cardelli et al. (1989ApJ...345..245C) extinction law with RV=3.1. Note (5): Errors include the photometric uncertainty within the aperture and the error in the zeropoint (0.05 and 0.03mAB in the FUV and NUV, respectively; Morrissey et al. 2007ApJS..173..682M). Note (6): Measured from a growth curve which is computed using fixed central coordinates, ellipticity and position angle as described above, and corrected for Milky Way extinction. Note (7): The quoted errors include the photometric uncertainty within the aperture, the error in the zeropoint, as well as the the uncertainty due to the error-weighted fit of the growth curve.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 A1 --- S [S] Supplement galaxy (G1) 2- 4 I03 --- Seq Running index number (G1) 6- 18 A13 --- Name Galaxy name 20- 23 I4 arcsec MajAxis ? Semi-major axis (1) 25- 28 I4 arcsec MinAxis ? Semi-minor axis (1) 30- 32 I3 deg PosAng ? Position angle (1) 34 A1 --- l_FUVlvl The 3σ upper-limit flag on FUVlvl 35- 39 F5.2 mag FUVlvl ? GALEX/FUV band LVL magnitude (2) 41- 44 F4.2 mag e_FUVlvl ? Uncertainty in FUVlvl (3) 46 A1 --- l_NUVlvl The 3σ upper-limit flag on NUVlvl 47- 51 F5.2 mag NUVlvl ? GALEX/NUV band LVL magnitude (2) 53- 56 F4.2 mag e_NUVlvl ? Uncertainty in NUVlvl (3)
Note (1): Of the elliptical annulus used by Dale et al. (2009ApJ...703..517D) to extract photometry from Spitzer IRAC and MIPS imaging, reproduced from Dale et al. (2009ApJ...703..517D) Table 1. Note (2): Measured in the common elliptical aperture described by the preceding columns. Corrections for Milky Way foreground extinction have been applied using the E(B-V) values listed here, and the Cardelli et al. (1989) extinction law with RV=3.1. That is, AFUV=7.9E(B-V) and AFUV=8.0E(B-V). Note (3): Includes the photometric uncertainty within the aperture and the error in the zeropoint (0.05 and 0.03magAB in the FUV and NUV, respectively; Morrissey et al. 2007ApJS..173..682M).
Global notes: Note (G1): Galaxies in the composite LVL sample which are not included in Paper I (generally targets drawn from the ANGST sample) are listed separately at the end of the table with the "Seq" index number restarting at 1. The letter "S" was added at CDS for these objects (between S001 and S027.)
History: From electronic version of the journal References: Kennicutt et al. Paper I. 2008ApJS..178..247K Cat. J/ApJS/178/247 Lee et al. Paper III. 2009ApJ...706..599L Cat. J/ApJ/706/599
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-Mar-2011
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