J/MNRAS/475/5133 3DHST CANDELS redshift compilation (Rodrigues+, 2018)
Testing the hierarchical assembly of massive galaxies using accurate merger
rates out to z ∼ 1.5.
Rodrigues M., Puech M., Flores H., Hammer F., Pirzkal N.
<Mon. Not. R. Astron. Soc., 475, 5133-5143 (2018)>
=2018MNRAS.475.5133R 2018MNRAS.475.5133R (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Redshifts
Keywords: galaxies: evolution - galaxies: formation - galaxies: high-redshift -
galaxies: interactions
Abstract:
We established an accurate comparison between observationally and
theoretically estimated major merger rates over a large range of mass
(logMbar/M☉=9.9-11.4) and redshift (z=0.7-1.6). For this,
we combined a new estimate of the merger rate from an exhaustive count
of pairs within the virial radius of massive galaxies at z∼1.265 and
cross-validated with their morphology, with estimates from the
morpho-kinematic analysis of two other samples. Theoretical
predictions were estimated using semi-empirical models with inputs
matching the properties of the observed samples, while specific
visibility time-scales scaled to the observed samples were used. Both
theory and observations are found to agree within 30 per cent of the
observed value, which provides strong support to the hierarchical
assembly of galaxies over the probed ranges of mass and redshift.
Here, we find that ∼60 per cent of population of local massive
(Mstellar=1010.3-11.6M☉) galaxies would have undergone a
wet major merger since z=1.5, consistently with previous studies.
Such recent mergers are expected to result in the (re-)formation of a
significant fraction of local disc galaxies.
Description:
We collected all zspec measurements available in GOODS-S and
constructed an updated catalogue of the most accurate redshift
measurements for 3D-HST sources in this field.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 56 13984 3DHST CANDELS redshift compilation
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See also:
J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+ 2016)
J/MNRAS/475/5133 : 3D-HST CANDELS redshift compilation (Rodrigues+, 2018)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ID [1/50502] Identification number,
[SWM2014] GOODS-S NN in Simbad
7- 17 F11.8 deg RAdeg Right ascension (J2000)
19- 30 F12.8 deg DEdeg declination (J2000)
32- 38 F7.4 mag Jmag ?=- J magnitude
40- 46 F7.4 --- z ?=-1 Spectroscopic or photometric redshift
51 I1 --- q_z [0/3] Redshift quality flag (1)
55- 56 I2 --- Flag [-1/4] Flag type (2)
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Note (1): Redshift quality flag as follows:
3 = secure (99% sure)
2 = likely (95% sure, including spectrum with a single line)
1 = insecure
Note (2): Flag type as follows:
1 = single zspec match
2 = multiple zspec matches for a single photometric source. If all zspec
measurements agreed within 0.001, the zspec with higher spectroscopic
QF was considered and we then set QF=3. If the disagreement between
the different zspec was larger than 0.001, all spectra were checked
visually to determine the final zspec and associated QF.
3 = multiple zspec matches for multiple photometric sources within the
cross-correlation radius of 0.5 arcsec. All spectra and astrometry were
checked to determine the final zspec and associated QF for all sources
4 = no zspec match. The zgrism estimate from Momcheva et al. (2016,
Cat. J/ApJS/225/27) was adopted.
-1 = neither zspec nor zgrism match. The zphot estimate from Momcheva et al.
(2016, Cat. J/ApJS/225/27) was adopted.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Apr-2021