J/ApJ/872/91 SHELS galaxy sizes using Subaru/HSC imaging (Damjanov+, 2019)
Quiescent galaxy size and spectroscopic evolution: combining HSC imaging and
Hectospec spectroscopy.
Damjanov I., Zahid H.J., Geller M.J., Utsumi Y., Sohn J., Souchereau H.
<Astrophys. J., 872, 91 (2019)>
=2019ApJ...872...91D 2019ApJ...872...91D
ADC_Keywords: Galaxies, spectra; Morphology; Photometry, RI; Redshifts
Keywords: galaxies: evolution; galaxies: fundamental parameters;
galaxies: statistics; galaxies: stellar content; galaxies: structure
Abstract:
We explore the relationships between size, stellar mass, and average
stellar population age (indicated by Dn4000 indices) for a sample of
∼11000 intermediate-redshift galaxies from the SHELS spectroscopic
survey (Geller+ 2014, J/ApJS/213/35) augmented by high-resolution
Subaru Telescope Hyper Suprime-Cam imaging. In the redshift interval
0.1<z<0.6, star-forming galaxies are on average larger than their
quiescent counterparts. The mass-complete sample of
∼3500M*>1010M☉ quiescent galaxies shows that the average
size of a 1011M☉ quiescent galaxy increases by ≲25% from
z∼0.6 to z∼0.1. This growth rate is a function of stellar mass: the
most massive (M*>1010M☉) galaxies grow significantly more
slowly in size than quiescent systems an order of magnitude less
massive that grow by 70% in the 0.1≲z≲0.3 redshift interval. For
M*<1011M☉ galaxies, age and size are anticorrelated at fixed
mass; more massive quiescent systems show no significant trend in size
with average stellar population age. The evolution in absolute and
fractional abundances of quiescent systems at intermediate redshift
are also a function of galaxy stellar mass. The suite of evolutionary
trends suggests that galaxies more massive than ∼1011M☉ have
mostly assembled their mass by z∼0.6. Quiescent galaxies with lower
stellar masses show more complex evolution that is characterized by a
combination of individual quiescent galaxy size growth (through
mergers) and an increase in the size of newly quenched galaxies
joining the population at later times (progenitor bias). The low-mass
population (M*∼1010M☉) grows predominantly as a result of
progenitor bias. For more massive (M*∼5x1010M☉) quiescent
galaxies, (predominantly minor) mergers and progenitor bias make more
comparable contributions to the size growth. At intermediate redshift,
quiescent size growth is mass-dependent; the most massive
(M*>1010M☉) galaxies experience the least rapid increase in
size from z∼0.6 to z∼0.1.
Description:
We measure galaxy sizes using Subaru Hyper Suprime-Cam (HSC) i-band
images of the 2x2deg2 region covering the Deep Lens Survey (DLS;
Wittman+ 2002SPIE.4836...73W 2002SPIE.4836...73W) field F2: RAJ2000=09:18:00,DEJ2000=+30:00:00.
The F2-HSC image includes 18 pointings, each with a 240s exposure.
Galaxy number counts show that the HSC F2 image provides a complete
catalog of extended sources to a limiting i-band magnitude of i∼25.
The typical seeing FWHM is ∼0.6".
DLS imaging provided the photometric catalog for the complete redshift
survey of the F2 field (SHELS; Geller+ 2014, J/ApJS/213/35) carried
out with the Hectospec wide-field multiobject spectrograph mounted on
the MMT.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 12842 Structural properties of F2 DLS field
Subaru-HSC galaxies
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See also:
VII/86 : Groups of Galaxies. I. Nearby Groups (Huchra+ 1982)
VII/84 : Groups of Galaxies. III. The CfA Survey (Geller+ 1983)
II/344 : KiDS-ESO-DR2 multi-band source catalog (de Jong+, 2015)
J/ApJ/604/521 : Luminosities & masses of gal. out to z∼3 (Trujillo+, 2004)
J/MNRAS/382/109 : Massive galaxies in Extended Groth Strip (Trujillo+, 2007)
J/MNRAS/398/1129 : Central galaxies in groups and clusters (Guo+, 2009)
J/ApJ/720/723 : Compact galaxies in the local universe (Taylor+, 2010)
J/AJ/139/1857 : Sample of major galaxy pairs at z=0.08-0.38 (Woods+, 2010)
J/ApJ/739/L44 : Structural data for gal. between 0.2<z<2.7 (Damjanov+, 2011)
J/ApJ/775/106 : CANDELS passive and massive early-type gal. (Cassata+, 2013)
J/A+A/556/A55 : Multi-color photometry of star-forming gal. (Ilbert+, 2013)
J/ApJ/777/18 : Stellar mass functions of galaxies to z=4 (Muzzin+, 2013)
J/ApJ/762/77 : PM2GC mass-limited sample surface photom. (Poggianti+, 2013)
J/ApJ/771/85 : Dynamical masses of z∼2 quiescent gal. (van de Sande+, 2013)
J/ApJS/213/35 : SHELS: galaxy redshift survey for R≤20.6 (Geller+, 2014)
J/ApJS/224/11 : SHELS: redshift survey of the F1 DLS field (Geller+, 2016)
J/ApJS/225/27 : 3D-HST Survey: grism spectra master cat. (Momcheva+, 2016)
J/ApJ/821/101 : Stellar MFP for massive quiescent z<0.7 gal. (Zahid+, 2016)
J/ApJS/234/21 : Hectospec survey of gal. in COSMOS (Damjanov+, 2018)
J/ApJ/855/100 : HectoMAP cluster survey. II. X-ray clusters (Sohn+, 2018)
J/ApJ/856/172 : The HectoMAP cluster survey. I. (Sohn+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- SHELS SHELS Identifier, DDD.ddddddd+DD.ddddddd (1)
24- 29 F6.3 mag Rmag [13.19/20.6] Deep Lens Survey (DLS) R-band
magnitude (1)
31- 35 F5.3 mag e_Rmag [0/9.99] Uncertainty in Rmag
37- 43 F7.5 --- zspec [0.005/3.41] Spectroscopic redshift (1)
45- 51 F7.5 --- e_zspec [0/0.002] Uncertainty in zspec
53- 59 F7.4 arcsec re [0.005/14] Half-light radii
61- 66 F6.4 arcsec e_re [0.0002/0.8] Uncertainty in re
68- 73 F6.4 --- b/a [0.0029/1] Axial ratios b/a
75- 80 F6.4 --- e_b/a [0/0.82] Uncertainty in b/a
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Note (1): From Geller et al. (2014, J/ApJS/213/35)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 04-Aug-2020