J/ApJS/220/12 FMOS-COSMOS survey III. 0.7 =2015ApJS..220...12S (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Galaxies, spectra ; Spectra, infrared ; Redshifts ; Surveys Keywords: galaxies: general; galaxies: high-redshift; galaxies: ISM; surveys; techniques: spectroscopic Abstract: We present a spectroscopic survey of galaxies in the COSMOS field using the Fiber Multi-object Spectrograph (FMOS), a near-infrared instrument on the Subaru Telescope. Our survey is specifically designed to detect the H{alpha} emission line that falls within the H-band (1.6-1.8{mu}m) spectroscopic window from star-forming galaxies with 1.4~10^10^M_{sun}_. With the high multiplex capability of FMOS, it is now feasible to construct samples of over 1000 galaxies having spectroscopic redshifts at epochs that were previously challenging. The high-resolution mode (R~2600) effectively separates H{alpha} and [NII]{lambda}6585, thus enabling studies of the gas-phase metallicity and photoionization state of the interstellar medium. The primary aim of our program is to establish how star formation depends on stellar mass and environment, both recognized as drivers of galaxy evolution at lower redshifts. In addition to the main galaxy sample, our target selection places priority on those detected in the far-infrared by Herschel/PACS to assess the level of obscured star formation and investigate, in detail, outliers from the star formation rate (SFR)--stellar mass relation. Galaxies with H{alpha} detections are followed up with FMOS observations at shorter wavelengths using the J-long (1.11-1.35{mu}m) grating to detect H{beta} and [OIII]{lambda}5008 which provides an assessment of the extinction required to measure SFRs not hampered by dust, and an indication of embedded active galactic nuclei. With 460 redshifts measured from 1153 spectra, we assess the performance of the instrument with respect to achieving our goals, discuss inherent biases in the sample, and detail the emission-line properties. Our higher-level data products, including catalogs and spectra, are available to the community. Description: We report on observations carried out between 2012 March and 2013 January with Subaru/FMOS. The central square degree of COSMOS is effectively covered with four FMOS footprints, designated as HR1-HR4 (Figure 1), using both the high-resolution H-long (1.60-1.80um; R~2600) and J-long (1.11-1.35um) gratings. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table6.dat 156 1153 Observed Subaru/FMOS-COSMOS galaxies and measurements -------------------------------------------------------------------------------- See also: II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007) J/ApJ/806/L35 : NIR spectroscopy of COSMOS FIR galaxies (Kartaltepe+, 2015) J/ApJ/775/106 : CANDELS passive & massive early-type galaxies (Cassata+, 2013) J/A+A/556/A55 : Multi-color phot. of star-forming galaxies (Ilbert+, 2013) J/ApJ/761/143 : Black hole masses of z~1.4 AGNs from SXDS (Nobuta+, 2012) J/ApJS/201/30 : The Chandra COSMOS survey. III. (Civano+, 2012) J/A+A/544/A156 : UltraVISTA Catalogue Release DR1 (McCracken+, 2012) J/ApJ/751/50 : Cat. of galaxy groups from DEEP2 Redshift Survey (Gerke+ 2012) J/A+A/532/A90 : PACS Evolutionary Probe (PEP-DR1) catalogs (Lutz+, 2011) J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009) J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007) J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007) http://member.ipmu.jp/fmos-cosmos/FMOS-COSMOS.html : FMOS-COSMOS home page Byte-by-byte Description of file: table6.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 A5 --- --- [FMOS_] 6- 21 A16 --- FMOS FMOS unique identifier (JHHMMSS.s+DDMMSS) 23- 31 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000) 33- 39 F7.5 deg DEdeg Declination in decimal degrees (J2000) 41- 47 F7.3 --- z [0.7/2.5]?=-99 Best measurement of redshift 49 I1 --- q_z [0/4] Quality flag for z (z>=2: highly reliable; 0=no emission line detected) (1) 51 A1 --- l_FHa Limit flag on FHa (2) 52- 58 F7.3 10-17mW/m2 FHa [0.3/23.3]?=-99 Observed H{alpha} flux (3) 60- 65 F6.2 --- SNHa [1.5/37.1]?=-99 S/N of observed H{alpha} flux 67- 73 F7.2 km/s FWHMHa [42/1099]?=-99 Velocity FWHM of H{alpha} line (4) 75- 80 F6.2 km/s e_FWHMHa ?=-99 The 1{sigma} error in FWHMHa 82 A1 --- l_FNII Limit flag on FNII (2) 83- 89 F7.3 10-17mW/m2 FNII [0.2/24]?=-99 Observed [NII] (6584A) flux (3) 91- 96 F6.2 --- SNNII [1.5/18.1]?=-99 S/N of observed [NII](6584{AA}) flux 98-103 F6.2 --- ApCor1 [1.1/5.6]?=-99 Aperture correction factor (5) 105 A1 --- l_FHb Limit flag on FHb (2) 106-112 F7.3 10-17mW/m2 FHb [0.3/19.8]?=-99 Observed H{beta} flux (3) 114-119 F6.2 --- SNHb [1.5/14]?=-99 S/N of observed H{beta} flux 121 A1 --- l_FOIII Limit flag on FOIII (2) 122-128 F7.3 10-17mW/m2 FOIII [0.3/36]?=-99 Observed [OIII](5007A) flux (3) 130-135 F6.2 --- SNOIII [1.6/46]?=-99 S/N of observed [OIII](5007{AA}) flux 137-142 F6.2 --- ApCor2 [1.4/6.3]?=-99 Aperture correction factor (6) 144-150 F7.3 --- zCOS [0/3.4]?=-99 Redshift measurement from zCOSMOS-deep 152-156 F5.1 --- q_zCOS [0/22.5]?=-99 Quality flag for zCOS (7) -------------------------------------------------------------------------------- Note (1): Based on the S/N of the H{alpha} detection and corroborative information as described in Section 9. If detected then a value between 1 and 4, otherwise 0; as follows: 1 = Presence of a single emission line with S/N between 1.5 and 3. 2 = One emission line having S/N greater than 3 and less than 5. 3 = One emission line having S/N greater than 5. 4 = One emission line having S/N greater than 5 (usually H{alpha}) and a second line that both confirms the redshift and has S/N greater than 1.5. Note (2): Upper limits (non-detections) on the fluxes are given at a level of 2{sigma} and described in Section 8.2. Note (3): Not corrected for aperture loss. In units of 1e-17erg/s/cm^2^. A -99.0 indicate a NULL detection. Note (4): Not deconvolved with spectral resolution. Note (5): For H{alpha} and [NII](6584{AA}) fluxes to compensate for the effect of the aperture size and should be multiplied to the flux measurements. Note (6): For H{beta} and [OIII](5007{AA}) fluxes to compensate for the effect of the aperture size and should be multiplied to the flux measurements. Note (7): If observed a value of 0 or higher (with 0 being undetected). -------------------------------------------------------------------------------- History: From electronic version of the journal References: Kashino et al. Paper I. 2013ApJ...777L...8K zahid et al. Paper II. 2014ApJ...792...75Z ================================================================================ (End) Prepared by [AAS], Emmanuelle Perret [CDS] 06-Nov-2015