J/A+A/642/A192 C3R2-KMOS zsp & galaxy physical properties (Euclid Coll., 2020)
Euclid preparation: VIII. The Complete Calibration of the Colour-Redshift
Relation survey: VLT/KMOS observations and data release.
Euclid Collaboration, Guglielmo V., Saglia R., Castander F.J., Galametz A.,
Paltani S., Bender R., Bolzonella M., Capak P., Ilbert O., Masters D.C.,
Stern D., Andreon S., Auricchio N., Balaguera-Antolinez A., Baldi M.,
Bardelli S., Biviano A., Bodendorf C., Bonino D., Bozzo E., Branchini E.,
Brau-Nogue S., Brescia M., Burigana C., Cabanac R.A., Camera S.,
Capobianco V., Cappi A., Carbone C., Carretero J., Carvalho C.S., Casas R.,
Casas S., Castellano M., Castignani G., Cavuoti S., Cimatti A.,
Cledassou R., Colodro-Conde C., Congedo G., Conselice C.J., Conversi L.,
Copin Y., Corcione L., Costille A., Coupon J., Courtois H.M., Cropper M.,
Da Silva A., de la Torre S., Di Ferdinando D., Dubath F., Duncan C.A.J.,
Dupac X., Dusini S., Fabricius M., Farrens S., Ferreira P.G., Fotopoulou S.,
Frailis M., Franceschi E., Fumana M., Galeotta S., Garilli B., Gillis B.,
Giocoli C., Gozaliasl G., Gracia-Carpio J., Grupp F., Guzzo L.,
Hildebrandt H., Hoekstra H., Hormuth F., Israel H., Jahnke K., Keihanen E.,
Kermiche S., Kilbinger M., Kirkpatrick C.C., Kitching T., Kubik B., Kunz M.,
Kurki-Suonio H., Laureijs R., Ligori S., Lilje P.B., Lloro I., Maino D.,
Maiorano E., Maraston C., Marggraf O., Martinet N., Marulli F., Massey R.,
Maurogordato S., Medinaceli E., Mei S., Meneghetti M., Benton Metcalf R.,
Meylan G., Moresco M., Moscardini L., Munari E., Nakajima R., Neissner C.,
Niemi S., Nucita A.A., Padilla C., Pasian F., Patrizii L., Pocino A.,
Poncet M., Pozzetti L., Raison F., Renzi A., Rhodes J., Riccio G.,
Romelli E., Roncarelli M., Rossetti E., Sanchez A.G., Sapone D.,
Schneider P., Scottez V., Secroun A., Serrano S., Sirignano C., Sirri G.,
Sureau F., Tallada-Crespi P., Tavagnacco D., Taylor A.N., Tenti M.,
Tereno I., Toledo-Moreo R., Torradeflot F., Tramacere A., Valenziano L.,
Vassallo T., Wang Y., Welikala N., Wetzstein M., Whittaker L., Zacchei A.,
Zamorani G., Zoubian J., Zucca E.
<Astron. Astrophys. 642, A192 (2020)>
=2020A&A...642A.192E 2020A&A...642A.192E (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Galaxies, spectra ; Redshifts ; Galaxies, IR
Keywords: catalogs - surveys - cosmology: observations -
galaxies: distances and redshifts
Abstract:
The Complete Calibration of the Colour-Redshift Relation survey
(C3R2) is a spectroscopic effort involving ESO and Keck facilities
designed specifically to empirically calibrate the galaxy
colour-redshift relation - P(zjC) to the Euclid depth (iAB=24.5)
and is intimately linked to the success of upcoming Stage IV dark
energy missions based on weak lensing cosmology. The aim is to build a
spectroscopic calibration sample that is as representative as possible
of the galaxies of the Euclid weak lensing sample. In order to
minimise the number of spectroscopic observations necessary to fill
the gaps in current knowledge of the P(zjC), self-organising map (SOM)
representations of the galaxy colour space have been constructed. Here
we present the first results of an ESO@VLT Large Programme approved in
the context of C3R2, which makes use of the two VLT optical and
near-infrared multi-object spectrographs, FORS2 and KMOS. This data
release paper focuses on high-quality spectroscopic redshifts of
high-redshift galaxies observed with the KMOS spectrograph in the
near-infrared H- and K-bands. A total of 424 highly-reliable redshifts
are measured in the 1.3≤z≤2.5 range, with total success rates of
60.7% in the H-band and 32.8% in the K-band. The newly determined
redshifts fill 55% of high (mainly regions with no spectroscopic
measurements) and 35% of lower (regions with
low-resolution/low-quality spectroscopic measurements) priority empty
SOMgrid cells.We measured H fluxes in a 1.2" radius aperture from the
spectra of the spectroscopically confirmed galaxies and converted them
into star formation rates. In addition, we performed an SED fitting
analysis on the same sample in order to derive stellar masses, E(B-V),
total magnitudes, and SFRs. We combine the results obtained from the
spectra with those derived via SED fitting, and we show that the
spectroscopic failures come from either weakly star-forming galaxies
(at z<1.7, i.e. in the H-band) or low S/N spectra (in the K-band) of
z>2 galaxies.
Description:
Spectroscopic redshifts assigned during a VLT/KMOS Large Programme
(88h) in three extragalactic fields (COSMOS, VVDS, SXDF) as part of
the spectroscopic calibration survey for weak lensing cosmological
analysis (C3R2); the catalogue also contains relevant physical
information regarding the observed targets, derived either using SED
fitting analysis and spectral line analysis. The released catalogue
collects 424 high-quality (Q≥3) redshift measurements.
The properties of a sub-sample of galaxies are given in Table 5 of the
related manuscript.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 127 413 Spectroscopic redshifts and physical parameters
of the spectroscopically confirmed galaxies
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- objID Galaxy identification number
8- 16 F9.5 deg RAdeg Right ascension (J2000.0)
18- 25 F8.5 deg DEdeg Declinationn (J2000.0)
27- 52 A26 --- Pointing KMOS OB where the galaxy was observed
54- 59 F6.4 --- zsp Spectroscopic redshift assigned and
validated
61- 63 F3.1 --- q_zsp Quality flag of the redshift
measurement (1)
65- 70 F6.4 --- zph Photometric redshift in parent survey
72- 75 I4 --- Priority Observational priority of target (M17)
77- 79 F3.1 mag E(B-V) Best E(B-V) from LePhare
81- 86 F6.2 [Msun] b_logMass ?=-99 16th percentile of the stellar mass
88- 93 F6.2 [Msun] logMass ?=-99 Median value of the stellar mass
95-100 F6.2 [Msun] B_logMass ?=-99 84th percentile of the stellar mass
102-107 F6.2 [Msun/yr] b_SFR ?=-99 16th percentile of the SFR
109-114 F6.2 [Msun/yr] SFR ?=-99 Median value of the SFR
116-121 F6.2 [Msun/yr] B_SFR ?=-99 84th percentile of the SFR
123-127 F5.2 10-20W/m2 FHa Hα flux within 1.2" aperture
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Note (1): Quality flag as follows:
4.0 = indicates a secure redshift measurement based on the identification of
more than one emission line. Specifically, the Hα line is
associated with the NII doublet at λ6549.84Å,
λ6585.23Å. In one case, the OII doublet (λ3727.09Å
and λ3729.88Å) was identified rather than the Hα line.
3.5 = indicates a secure redshift measurement based on a single emission
line (usually Hα)
3.0 = indicates a likely secure redshift determination, but with a low
probability of an incorrect identification or an uncertain redshift
due to low signal-to-noise data or sky-line contamination affecting
the Gaussian fit
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Acknowledgements:
Valentina Guglielmo, gglvnt(at)mpe.mpg.de
References:
Euclid Coll., Paper II 2019MNRAS.484.5509E 2019MNRAS.484.5509E
Euclid Coll., Paper III 2019A&A...627A..23E 2019A&A...627A..23E
Euclid Coll., Paper IV 2019A&A...627A..59E 2019A&A...627A..59E
Euclid Coll., Paper V 2019A&A...631A..85E 2019A&A...631A..85E
Euclid Coll., Paper VI 2020A&A...635A.139E 2020A&A...635A.139E
(End) Valentina Guglielmo [MPE, Germany], Patricia Vannier [CDS] 08-Jul-2020