J/MNRAS/492/4599 Star formation in Abell 1758 with LoCuSS (Bianconi+, 2020)
LoCuSS: exploring the connection between local environment, star formation, and
dust mass in Abell 1758.
Bianconi M., Smith G.P., Haines C.P., McGee S.L., Finoguenov A., Egami E.
<Mon. Not. R. Astron. Soc., 492, 4599-4612 (2020)>
=2020MNRAS.492.4599B 2020MNRAS.492.4599B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Star Forming Region ; Redshifts ; Photometry ;
Spectroscopy ; Optical ; Ultraviolet ; Infrared
Keywords: galaxies: clusters: individual: Abell 1758 - galaxies: evolution -
galaxies: star formation
Abstract:
We explore the connection between dust and star formation, in the
context of environmental effects on galaxy evolution. In particular,
we exploit the susceptibility of dust to external processes to assess
the influence of dense environment on star-forming galaxies. We have
selected cluster Abell 1758 from the Local Cluster Substructure Survey
(LoCuSS). Its complex dynamical state is an ideal test-bench to track
dust removal and destruction in galaxies due to merger and accretion
shocks. We present a systematic panchromatic study (from 0.15µm
with GALEX to 500µm with Herschel) of spectroscopically confirmed
star-forming cluster galaxies at intermediate redshift. We observe
that the main subclusters (A1758N and A1758S) belong to two separate
large-scale structures, with no overlapping galaxy members.
Star-forming cluster members are found preferentially outside cluster
central regions, and are not isotropically distributed. Rather, these
galaxies appear being funneled towards the main subclusters along
separate accretion paths. Additionally, we present the first study of
dust-to-stellar (DTS) mass ratio used as an indicator for local
environmental influence on galaxy evolution. Star-forming cluster
members show lower mean values (32 per cent at 2.4σ) of DTS mass
ratio and lower levels of infrared emission from birth clouds with
respect to coeval star-forming field galaxies. This picture is
consistent with the majority of star-forming cluster members infalling
in isolation. Upon accretion, star formation is observed to decrease
and warm dust is destroyed due to heating from the intracluster medium
radiation, ram-pressure stripping, and merger shocks.
Description:
Abell 1758 is among the clusters selected for the Local Cluster
Substructure Survey (LoCuSS) survey (Smith et al.
2010A&A...518L..18S 2010A&A...518L..18S). As a result, it benefits from the extensive
coverage in both wavelength and area with GALEX (far-UV and near-UV),
Subaru/Suprime-Cam (g+ and R bands), UKIRT/WFCAM (J and K band),
mid-infrared 24µm with Spitzer/MIPS (reaching 90 per cent
completeness at 400µJy) and far-infrared with Herschel (Haines et
al. 2010A&A...518L..19H 2010A&A...518L..19H; Pereira et al. 2010A&A...518L..40P 2010A&A...518L..40P; Smith et
al. 2010A&A...518L..18S 2010A&A...518L..18S).
In particular, as part of the LoCuSS Open Time Key Program on Herschel
A1758 was observed at 100 and 160µm with PACS and at 250, 350, and
500µm with SPIRE. Additionally, A1758 is part of the the
volume-limited high-Lx LoCuSS subsample of 50 clusters and has
XMM-Newton imaging (see Martino et al. 2014MNRAS.443.2342M 2014MNRAS.443.2342M for further
observational details). Furthermore, wide-field (∼1deg diameter)
optical spectroscopy with MMT/Hectospec was performed, as part of the
Arizona Cluster Redshift Survey (ACReS; Haines et al.
2013ApJ...775..126H 2013ApJ...775..126H). ACReS observations provide spectroscopic
redshifts for 96 per cent of the sources detected at 24µm with
Spitzer down to 400µJy. Archival SDSS and WISE photometry were
added to the data pool. In particular, we used the AllWISE Source
Catalog, reaching flux limits (at SNR 5) of 54, 71, and 730µJy for
3.4, 4.6, and 12µm, respectively.
Objects:
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RA (ICRS) DE Designation(s)
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13 32 32.10 +50 30 36.9 Abell 1758 = 1RXS J133243.3+503256
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 53 90 Star-forming cluster galaxies' properties from
SED fitting
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right ascension (J2000)
11- 18 F8.5 deg DEdeg Declination (J2000)
20- 26 F7.5 --- z Redshift
28- 33 F6.3 [Msun] logM* Logarithm of the stellar mass
35- 40 F6.3 [Lsun] logLIR Logarithm of the total 3-1000um IR
luminosity
42- 46 F5.3 [Msun] logMdust Logarithm of the dust mass
48- 53 F6.3 [Msun/yr] logSFR Logarithm of the star formation rate
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 29-Mar-2023