FIBRE-Pac: FMOS Image-Based Reduction Package

Iwamuro, Fumihide; Moritani, Yuki; Yabe, Kiyoto; Sumiyoshi, Masanao; Kawate, Kaori; Tamura, Naoyuki; Akiyama, Masayuki; Kimura, Masahiko; Takato, Naruhisa; Tait, Philip J.; Ohta, Kouji; Totani, Tomonori; Suzuki, Yuji; Tonegawa, Motonari

doi:10.1093/pasj/64.3.59

Cited by 41 publications

(32 citation statements)

References 4 publications

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“…Details of the FMOS observations and data reduction are given in K. Nakajima et al in Figure 2. The flux errors are estimated in the same manner as Section 2.1, but with a 1-dimensional pixel-noise spectrum produced with the FMOS pipeline FIBRE-pac (FMOS Image-Based Reduction Package; Iwamuro et al 2012 In the observations for these optical emission lines, the FMOS fiber has covered only one of the three subcomponents in the COSMOS 12805 system. To obtain the total flux for all the three subcomponents, we estimate the flux loss correction factor, FFMOS, for the FMOS 1.…”

Section: Fmos Datamentioning

confidence: 99%

Evolution of N/O abundance ratios and ionization parameters from z ∼ 0 to 2 investigated by the direct temperature method

Kojima

Ouchi

Nakajima

et al. 2017

Publications of the Astronomical Society of Japan

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We present N/O abundance ratios, ionization parameters q ion , and oxygen abundance O/H for a total of 41 galaxies (11 individual galaxies and a 30-galaxy stack) including Lyα emitters and Lyman break galaxies at z ∼ 2, and investigate galaxy evolution from z ∼ 0 to 2 in conjunction with 208,529 local SDSS galaxies and 9 green pea galaxies (GPs). In contrast with most of the recent studies, we obtain the N/O ratio, q ion , and O/H measurements by direct T e methods with [O III] λ4363 and O III] λ1665 lines. Based on these reliable measurements, we find that there exist z ∼ 2 galaxies with an excess of N/O falling beyond the local average of N/O-O/H relation, while the majority of the z ∼ 2 galaxies have the N/O ratios nearly comparable with z ∼ 0 galaxies in the N/O-stellar mass relation. Our galaxies place the upper limit of N/O ratio log(N/O) ≤ −1.26 on average, suggesting that the N/O ratio evolves, if at all, by < 0.17 dex. Exploiting our reliable measurements free from the N/O-q ion -O/H degeneracies, we identify, for the first time, that z ∼ 2 galaxies with offsets in the BPT diagram indicate either 1) only an N/O excess, 2) only a q ion excess, or 3) both N/O and q ion excesses. We argue that the BPT offsets at z ∼ 2 are not made by one of 1)-3) galaxy populations alone, but the composite of 1)-3) populations. We confirm that these 1)-3) populations also exist at z ∼ 0, such as GPs and SDSS low-mass and high-SFR galaxies (LMHSs).

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Section: Fmos Datamentioning

confidence: 99%

Evolution of N/O abundance ratios and ionization parameters from z ∼ 0 to 2 investigated by the direct temperature method

Kojima

Ouchi

Nakajima

et al. 2017

Publications of the Astronomical Society of Japan

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“…Observations in both LR and HR mode were carried out in crossbeam switching mode. We performed data reduction, wavelength and flux calibration using the publicly available pipeline FIBRE-pac (FMOS Image-Based REduction package; Iwamuro et al 2012), providing 1D and 2D reduced spectra and their error spectra.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

An FMOS Survey of Moderate-luminosity, Broad-line AGNs in COSMOS, SXDS, and E-CDF-S

Schulze

Silverman

Kashino

et al. 2018

ApJS

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We present near-IR spectroscopy in J-and H-band for a large sample of 243 X-ray selected moderate-luminosity type-1 AGN in the COSMOS, SXDS and E-CDF-S survey fields using the multiobject spectrograph Subaru/FMOS. Our sample covers the redshift range 0.5 z 3.0 and an X-ray luminosity range of 10 43 L [2−10keV] 10 45 erg s −1 . We provide emission-line properties and derived virial black hole mass estimates, bolometric luminosities and Eddington ratios, based on Hα (211), Hβ (63) and Mg II (4). We compare line widths, luminosities and black hole mass estimates from Hα and Hβ and augment these with commensurate measurements of Mg II and C IV detected in optical spectra. We demonstrate the robustness of using Hα, Hβ and Mg II as reliable black hole mass estimators for high-z moderate-luminosity AGN, while the use of C IV is prone to large uncertainties ( 0.4 dex). We extend a recently proposed correction based on the C IV blueshift to lower luminosities and black hole masses. While our sample shows an improvement in their C IV black hole mass estimates, the deficit of high blueshift sources reduces its overall importance for moderate-luminosity AGN, compared to the most luminous quasars. In addition, we revisit luminosity correlations between L bol , L [2−10keV] , L [OIII] , L 5100 and L Hα and find them to be consistent with a simple empirical model, based on a small number of well-established scaling relations. We finally highlight our highest redshift AGN, CID 781, at z = 4.6 which shows the lowest black hole mass (∼ 10 8 M ⊙ ) among current near-IR samples at this redshift, and is in a state of fast growth.

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“…We observed in cross-beam switching mode, with two fibers assigned to each target -one for the target and the other for sky -and dithered between the two for optimum sky subtraction. The observations were reduced, wavelength, and flux-calibrated using the publicly available pipeline FIBRE-pac (FMOS Image-Based REduction package; Iwamuro et al 2012). We visually inspected the 1D and 2D reduced spectra from all 19 pointings and measured redshifts using SPECpro (Masters & Capak 2011).…”

Section: Fmos Observationsmentioning

confidence: 99%

REST-FRAME OPTICAL EMISSION LINES IN FAR-INFRARED-SELECTED GALAXIES AT z < 1.7 FROM THE FMOS-COSMOS SURVEY

Kartaltepe

Sanders

Silverman

et al. 2015

ApJ

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We have used FMOS on Subaru to obtain near-infrared spectroscopy of 123 far-infrared selected galaxies in COSMOS and obtain the key rest-frame optical emission lines. This is the largest sample of infrared galaxies with near-infrared spectroscopy at these redshifts. The far-infrared selection results in a sample of galaxies that are massive systems that span a range of metallicities in comparison with previous optically selected surveys, and thus has a higher AGN fraction and better samples the AGN branch. We establish the presence of AGN and starbursts in this sample of (U)LIRGs selected as Herschel-PACS and Spitzer-MIPS detections in two redshift bins (z ∼ 0.7 and z ∼ 1.5) and test the redshift dependence of diagnostics used to separate AGN from star-formation dominated galaxies. In addition, we construct a low redshift (z ∼ 0.1) comparison sample of infrared selected galaxies and find that the evolution from z ∼ 1.5 to today is consistent with an evolving AGN selection line and a range of ISM conditions and metallicities from the models of Kewley et al. (2013b). We find that a large fraction of (U)LIRGs are BPT-selected AGN using their new, redshift-dependent classification line. We compare the position of known X-ray detected AGN (67 in total) with the BPT selection and find that the new classification line accurately selects most of these objects (> 70%). Furthermore, we identify 35 new (likely obscured) AGN not selected as such by their X-ray emission. Our results have direct implications for AGN selection at higher redshift with either current (MOSFIRE, KMOS) or future (PFS, MOONS) spectroscopic efforts with near-infrared spectral coverage.

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FIBRE-Pac: FMOS Image-Based Reduction Package

Cited by 41 publications

References 4 publications

Evolution of N/O abundance ratios and ionization parameters from z ∼ 0 to 2 investigated by the direct temperature method

Evolution of N/O abundance ratios and ionization parameters from z ∼ 0 to 2 investigated by the direct temperature method

An FMOS Survey of Moderate-luminosity, Broad-line AGNs in COSMOS, SXDS, and E-CDF-S

REST-FRAME OPTICAL EMISSION LINES IN FAR-INFRARED-SELECTED GALAXIES AT z < 1.7 FROM THE FMOS-COSMOS SURVEY

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