J/ApJ/878/66 Spectroscopic redshifts of gal. in SPT-CLJ0615-5746 (Connor+, 2019)
Assembling a RELIC at redshift 1: spectroscopic observations of galaxies in the
RELICS cluster SPT-CLJ0615-5746.
Connor T., Kelson D.D., Blanc G.A., Boutsia K.
<Astrophys. J., 878, 66 (2019)>
=2019ApJ...878...66C 2019ApJ...878...66C
ADC_Keywords: Clusters, galaxy; Spectra, optical; Redshifts
Keywords: galaxies: clusters: individual (SPT-CLJ0615-5746) ;
galaxies: distances and redshifts ; surveys
Abstract:
We present a catalog of spectroscopic redshifts for SPT-CLJ0615-5746,
the most distant cluster in the Reionization Lensing Cluster Survey.
Using Nod & Shuffle multislit observations with LDSS-3 on Magellan, we
identify ∼50 cluster members and derive a cluster redshift of
zc=0.972, with a velocity dispersion of σ=1244±162km/s. We
calculate a cluster mass using a σ200-M200 scaling relation
of M200=(9.6±3.5)x1014M☉, in agreement with previous,
independent mass measurements of this cluster. In addition, we examine
the kinematic state of SPT-CLJ0615-5746, taking into consideration
prior investigations of this system. With an elongated profile in
lensing mass and X-ray emission, a non-Gaussian velocity dispersion
that increases with clustercentric radius, and a brightest cluster
galaxy not at rest with the bulk of the system, there are multiple
cluster properties that, while not individually compelling, combine to
paint a picture that SPT-CLJ0615-5746 is currently being assembled.
Description:
The primary work of this survey was conducted with the Low Dispersion
Survey Spectrograph 3 (LDSS-3) on the Magellan Clay 6.5m telescope.
Masks cover the range 7200-9000Å with R∼1350 and dates spanning
2017 Nov 30 to 2019 Jan 13.
We also observed SPT-CL J0615-57 with the Gladders Image-Slicing
Multislit Option (GISMO) for the Inamori-Magellan Areal Camera and
Spectrograph (IMACS) on Magellan-Baade. Observations (R∼1280) were
conducted solely on 2018 January 13 and only for one mask.
This work is also based on observations taken by the Reionization
Lensing Cluster Survey (RELICS, Coe+ 2019, J/ApJ/884/85) Program
(GO 14096) with the NASA/ESA HST.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 40 13 Magellan observing log
table2.dat 61 58 Redshift catalog
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See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
J/ApJ/455/60 : CFRS II: 0000-00 and 1000+25 fields (Le Fevre+ 1995)
J/ApJS/150/1 : VV29 and NGC 4676 HST photometry (Benitez+, 2004)
J/AJ/132/926 : Galaxies in the Hubble Ultra Deep Field (Coe+, 2006)
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
J/ApJ/792/76 : Lensed z∼6-8 galaxies behind CLASH clusters (Bradley+, 2014)
J/ApJS/211/21 : Spectroscopic redshifts of galaxies in MACS (Ebeling+, 2014)
J/ApJS/216/27 : Galaxy clusters discovered in the SPT-SZ survey (Bleem+, 2015)
J/MNRAS/452/1437 : Abell 2744 strong-lensing analysis (Jauzac+, 2015)
J/ApJ/812/114 : Grism Lens-Amplified Survey from Space. I. (Treu+, 2015)
J/MNRAS/461/248 : 44 SZ-selected galaxy clusters ACT obs. (Sifon+, 2016)
J/ApJ/837/88 : SPT-GMOS sp. of galaxies in massive clusters (Bayliss+, 2017)
J/ApJ/848/37 : HST UV-IR photometry in CLASH galaxy clusters (Connor+, 2017)
J/ApJ/835/113 : Galaxies ≳6 from the Hubble Frontier Fields (Livermore+, 2017)
J/MNRAS/473/663 : MUSE and HFFs Photometry of A2744 (Mahler+, 2018)
J/ApJ/884/85 : RELICS: Reionization Lensing Cluster Survey (Coe+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 I1 --- Mask [0/9]? Mask number
3- 8 A6 --- Inst Instrument
10-20 A11 "date" Date Date of observation (UT) at start of the night
22-23 I2 s Time [45/90]? Dwell time
25-30 A6 s Exp Exposure time
32-34 F3.1 arcsec Seeing [0.8/1.1] Seeing (1)
36-37 I2 --- Nobs [12/34]? Number of objects on mask
39-40 I2 --- Nz [1/11]? Number of objects with measured redshifts
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Note (1): Worst seeing reported by the observer for those observations.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- ID [3044/20122] RELICS Catalog ID
(
in Simbad)
7- 15 F9.6 deg RAdeg [93.9/94.1] Right Ascension (J2000)
17- 26 F10.6 deg DEdeg [-57.82/-57.74] Declination (J2000)
28- 34 F7.5 --- z [0.124/1.205] Spectroscopic redshift
36 I1 --- Mask [0/9]? Mask target was observed on (1)
38 I1 --- q_z [2/3] Quality of z (3=good; 2=less certain)
40- 45 F6.3 mag F606Wmag [18.68/24.98] HST/ACS F606W AB magnitude (2)
47- 52 F6.3 mag F814Wmag [18.13/22.97] HST/ACS F814W AB magnitude (2)
54- 59 F6.3 mag F105Wmag [17.86/22.53]? HST/WFC3-IR F105W AB magnitude (2)
61 I1 --- Em [0/1] Binary emission line flag
(1=emission lines observed)
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Note (1): Masks are detailed in Table 1.
Note (2): From the Reionization Lensing Cluster Survey (RELICS) photometric
catalog. Median uncertainties are 0.026, 0.005, and 0.009 magnitudes
for F606W, F814W, and F105W, respectively.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 03-Dec-2020