J/ApJS/256/4 Catalogue of galaxies observed with Hectospec (Cheng+, 2021)
Searching for low-redshift faint galaxies with MMT/Hectospec.
Cheng C., Huang J.-S., Willmer C.N.A., Zhang H.-X., Ashby M.L.N., Xu H.,
Sawicki M., Arnouts S., Gwyn S., Desprez G., Coupon J., Golob A., Liang P.,
Cao T., Shi Y., Jin G., He C., Wu S., Li Z., Dai Y.S., Xu C.K., Shao X.,
Musin M.
<Astrophys. J. Suppl. Ser. 256, 4 (2021)>
=2021ApJS..256....4C 2021ApJS..256....4C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Redshifts ; Photometry, SDSS
Keywords: redshift surveys - post-starburst galaxies - galaxy formation -
quenched galaxies - dwarf galaxies - spectroscopy
Abstract:
We present redshifts for 2753 low-redshift (0.05~<zspec~<0.5)
galaxies with 18≤r≤22 obtained with Hectospec at the Multi-Mirror
Telescope (MMT). The observations targeted the XMM-LSS, ELAIS-N1 and
DEEP2-3 fields, each of which covers ∼1deg2. These fields are also
part of the recently completed CFHT Large Area U-band Deep Survey
(CLAUDS) and on-going Hyper Suprime-Cam deep fields surveys. The
efficiency of our technique for selecting low-redshift galaxies is
confirmed by the redshift distribution of our sources. In addition to
redshifts, these high S/N spectra are used to measure ages,
metallicities, and nuclear activity levels. In combination with the
photometric catalogue in u, g, r, i, z, y down to 27 AB mag, we are
able to study the galaxy population down to stellar masses of
∼108M☉ . This paper presents the observation strategy, the
reduction procedure and properties of the galaxy sample.
The catalog can be accessed through the webpage of this survey
http://mips.as.arizona.edu/~cnaw/Faint_Low_z/.
Description:
To study the galaxy population especially the low-redshift faint field
galaxies, we performed a redshift survey in the HSC-survey deep fields
by MMT/Hectospec. Previous low-redshift redshift surveys such as
Satellites Around Galactic Analogs (SAGA, Geha et al.,
2017ApJ...847....4G 2017ApJ...847....4G; Mao et al., 2021ApJ...907...85M 2021ApJ...907...85M) and Southern
Stellar Stream Spectroscopic Survey (S5, Li et al.,
2019MNRAS.490.3508L 2019MNRAS.490.3508L) focused on the satellite galaxies and stellar
streams at zspec≲0.02, the properties of which would be affected by
the environment.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 87 2753 Catalogue of galaxies observed with Hectospec
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- ID Target ID, JHHMMSs.s+DDMMSS.s
22- 33 F12.8 deg RAdeg Right ascension (J2000)
38- 48 F11.8 deg DEdeg Declination (J2000)
50- 54 F5.2 mag rmagaper 1 arcsec aperture r magnitude (AB)
63- 70 F8.6 --- zsp Spectroscopic redshift
73- 80 F8.6 --- e_zsp Spectroscopic redshift error
87 I1 --- q_zsp [3/4] Redshft quality (1)
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Note (1): quality flag of the spectroscopic z with the same criterion as the
DEEP2 survey (Willmer et al. 2006ApJ...647..853W 2006ApJ...647..853W;
Newman et al. 2013ApJS..208....5N 2013ApJS..208....5N). 3-4 for high quality.
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Acknowledgements:
Cheng Cheng, chengcheng(at)nao.cas.cn
(End) Patricia Vannier [CDS] 16-Sep-2021