J/ApJ/846/159 Interferometric CO obs. of 126 CALIFA galaxies (Bolatto+, 2017)
The EDGE-CALIFA survey: interferometric observations of 126 galaxies with CARMA. Bolatto A.D., Wong T., Utomo D., Blitz L., Vogel S.N., Sanchez S.F., Barrera-Ballesteros J., Cao Y., Colombo D., Dannerbauer H., Garcia-Benito R., Herrera-Camus R., Husemann B., Kalinova V., Leroy A.K., Leung G., Levy R.C., Mast D., Ostriker E., Rosolowsky E., Sandstrom K.M., Teuben P., van de Ven G., Walter F. <Astrophys. J., 846, 159 (2017)> =2017ApJ...846..159B
ADC_Keywords: Galaxies, nearby ; Interferometry ; Carbon monoxide ; Photometry, SDSS ; Photometry, infrared Keywords: galaxies: evolution ; galaxies: ISM ; ISM: molecules Abstract: We present interferometric CO observations, made with the Combined Array for Millimeter-wave Astronomy (CARMA) interferometer, of galaxies from the Extragalactic Database for Galaxy Evolution survey (EDGE). These galaxies are selected from the Calar Alto Legacy Integral Field Area (CALIFA) sample, mapped with optical integral field spectroscopy. EDGE provides good-quality CO data (3σ sensitivity Σmol∼11M_☉/pc2 before inclination correction, resolution ∼1.4kpc) for 126 galaxies, constituting the largest interferometric CO survey of galaxies in the nearby universe. We describe the survey and data characteristics and products, then present initial science results. We find that the exponential scale lengths of the molecular, stellar, and star-forming disks are approximately equal, and galaxies that are more compact in molecular gas than in stars tend to show signs of interaction. We characterize the molecular-to-stellar ratio as a function of Hubble type and stellar mass and present preliminary results on the resolved relations between the molecular gas, stars, and star-formation rate. We then discuss the dependence of the resolved molecular depletion time on stellar surface density, nebular extinction, and gas metallicity. EDGE provides a key data set to address outstanding topics regarding gas and its role in star formation and galaxy evolution, which will be publicly available on completion of the quality assessment. Description: Observations of the original 177 CALIFA galaxies sample were conducted by CARMA's E-array in late 2014, integrating 40 minutes per galaxy. 125 galaxies were subsequently (from 2014 December to 2015 March) observed in the more extended D configuration, with an additional ∼3.5hr of integration per target. The CARMA correlator was configured with five 250MHz windows covering the 12CO line with 3.4km/s resolution and a 3000km/s velocity range, and three 500MHz windows covering the 13CO line with 14.3km/s resolution and a 3800km/s velocity range. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 67 126 EDGE survey galaxy properties table2.dat 70 126 EDGE survey observations and photometry table3.dat 88 126 EDGE survey galaxy parameters and scale lengths
See also: J/AJ/136/2782 : Star formation efficiency in nearby galaxies (Leroy+, 2008) J/AJ/136/2563 : HI Nearby Galaxy Survey, THINGS (Walter+, 2008) J/ApJS/184/1 : Molecular clouds in the LMC by NANTEN. II. (Kawamura+, 2009) J/MNRAS/413/813 : ATLAS3D project. I. (Cappellari+, 2011) J/MNRAS/415/32 : COLD GASS survey (Saintonge+, 2011) J/ApJS/196/11 : Bulge+disk decompositions of SDSS galaxies (Simard+, 2011) J/A+A/542/A108 : Giant molecular clouds in M33 (Gratier+, 2012) J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013) J/ApJ/768/74 : PHIBSS: CO obs. of star-forming galaxies (Tacconi+, 2013) J/A+A/576/A135 : CALIFA DR2 (Garcia-Benito+, 2015) J/A+A/587/A70 : CALIFA face-on spiral gal. oxygen (Sanchez-Menguiano+, 2016) J/A+A/597/A48 : Stellar kinematics in CALIFA survey (Falcon-Barroso+, 2017) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Galaxy name 15- 16 I2 h RAh [0/23] Hour of Right Ascension (
J2000) (1) 18- 19 I2 min RAm Minute of Right Ascension ( J2000) (1) 21- 24 F4.1 s RAs Second of Right Ascension ( J2000) (1) 26 A1 --- DE- [+] Sign of the Declination ( J2000)(1) 27- 28 I2 deg DEd [0/84] Degree of Declination ( J2000) (1) 30- 31 I2 arcmin DEm Arcminute of Declination ( J2000) (1) 33- 36 F4.1 arcsec DEs Arcsecond of Declination ( J2000) (1) 38- 41 A4 --- MType Mophological type 43- 45 A3 --- n_Name Galaxy notes (2) 47- 50 I4 km/s VLSR [1530/8693] Local Standard of Rest systemic velocity (3) 52- 54 I3 arcsec D25 [37/202] Optical diameter (4) 56- 57 I2 deg Inc [17/90] Inclination (5) 59- 61 I3 deg PA Position angle (5) 63- 67 F5.1 Mpc Dist [22.7/130.1] Distance (6)
Note (1): According to Hyper-LEDA (Makarov+ 2014A&A...570A..13M). Note (2): Note (according to HyperLEDA) as follows: B = has a bar; R = has a ring; M = is part of a multiple. Note (3): As determined (in order of preference) from CO rotation curve fitting, CALIFA observations, or failing those the LEDA catalog. The velocity is expressed in the relativistic convention (v = c(ν02-ν2)/(ν02+ν2)). Note (4): The optical size of the galaxy as the 25th magnitude isophotal diameter, according to HyperLEDA. Note (5): Derived from CO rotation curve fitting where that is possible (Levy+, in prep.; Leung+, submitted), or determined from the shape of the outer isophotes (Falcon-Barroso+ 2017, J/A+A/597/A48), or failing that taken from HyperLEDA. Note (6): The distance is determined from the redshift z obtained by CALIFA for emission lines, and is computed as the luminosity distance in a flat cosmology with H0=70km/s, Ωm=0.27, and ΩΛ=0.73.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Galaxy name 15 A1 --- l_IFlux Limit flag on IFlux 16- 20 F5.1 Jy.km/s IFlux [2.5/456] Velocity integrated CO flux (7) 22- 24 F3.1 Jy.km/s e_IFlux [0/8.1]? Uncertainty in IFlux 26- 28 F3.1 arcsec theta [3/6] Equivalent round synthesized beam (8) 30- 33 F4.1 mJy/beam RMS [5.9/19] Noise in central region of cube (9) 35 A1 --- l_logMmol Limit flag on logMmol 36- 40 F5.2 [Msun] logMmol [7.9/10.2] Log molecular mass (10) 42- 45 F4.2 [Msun] e_logMmol [0/0.3]? Uncertainty in logMmol 47 A1 --- f_logMmol [e] Flag on logMmol (11) 49- 53 F5.2 mag gmag [11.9/15.5] SDSS g band apparent mag (12) 55- 59 F5.2 mag rmag [11/15] SDSS r band apparent magnitude (12) 61- 65 F5.2 mag W1mag [8/11.7] WISE 3.4um band apparent mag (12) 67- 70 F4.2 mag W4mag [0.5/8.5] WISE 22um band apparent mag (12)
Note (7): Measured in the smooth masking approach described in Section 3.1.1. Note (8): Computed as the geometric mean of the major and minor beam sizes. Note (9): Calculated as the RMS in 10km/s channels. Note (10): Calculated using Eq. 3 in Bolatto et al. (2013ARA&A..51..207B) assuming a Galactic CO-to-H2 conversion factor of XCO = 2e20 cm-2(K.km/s)-1 and including the correction for the contribution from Helium to the mass (i.e., using αCO = 4.36MSun(K.km/s.pc2)-1. Note (11): e = αCO = 0.8MSun(K.km/s.pc2)-1, appropriate for ULIRGs. Note (12): SDSS magnitudes are computed from CALIFA synthetic photometry while the WISE magnitudes are computed from integrated photometry in the images (Bitsakis et al., in prep.). These are integrated magnitudes corrected by Galactic extinction.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Galaxy name 15- 19 F5.2 [Msun] logM* [9.5/11.8]? log galaxy stellar mass; Salpeter IMF 21- 24 F4.2 [Msun] e_logM* [0.08/0.2]? Uncertainty in logM* 26- 30 F5.2 [Msun/yr] logSFR [-2.3/1.6]? log total SFR at the equivalent radius (13) 32- 35 F4.2 [Msun/yr] e_logSFR [0.05/0.7]? Uncertainty in logSFR 37- 40 F4.2 [Sun] log[O/H] [8.3/8.7]? log gas metallicity at the equivalent radius (14) 42- 45 F4.2 [Sun] e_log[O/H] [0.02/0.2]? Uncertainty in log[O/H] 47- 50 F4.2 kpc Rhmol [1.2/9.8]? Radius enclosing 50% of CO flux 52- 55 F4.2 kpc e_Rhmol [0.04/0.3]? Uncertainty in Rhmol 57- 61 F5.2 kpc lmol [0.8/15]? Molecular gas scale length (15) 63- 67 F5.2 kpc e_lmol [0.2/12.5]? Uncertainty in lmol 69- 72 F4.2 kpc l* [1/7.2]? Stellar mass scale length (15) 74- 77 F4.2 kpc e_l* [0.02/1.5]? Uncertainty in l* 79- 83 F5.2 kpc lSFR [0.5/16]? Star formation rate scale length (15) 85- 88 F4.2 kpc e_lSFR [0.06/4.2]? Uncertainty in lSFR
Note (13): Log of total SFR from Hα corrected by Balmer-decrement inferred extinction. Note (14): Computed from CALIFA observations by PIPE3D (as 12+log[O/H]). Note (15): Resulting from fitting exponential disk profiles as described in Sections 4.1.2 and 4.1.3.
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 25-May-2018
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