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 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 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 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 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 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 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 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 2009ApJ...703..517D) to extract photometry from Spitzer IRAC and MIPS
imaging, reproduced from Dale et al. (2009ApJ...703..517D 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 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 2008ApJS..178..247K Cat. J/ApJS/178/247
Lee et al. Paper III. 2009ApJ...706..599L 2009ApJ...706..599L Cat. J/ApJ/706/599
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-Mar-2011