Quiescent galaxies in a virialized cluster at redshift 2: evidence for accelerated size growth
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Quiescent galaxies in a virialized cluster at redshift 2 : evidence for accelerated size growth. / Noordeh, E.; Canning, R. E. A.; Willis, J. P.; Allen, S. W.; Mantz, A.; Stanford, S. A.; Brammer, G.
I: Monthly Notices of the Royal Astronomical Society, Bind 507, Nr. 4, 11.2021, s. 5272-5280.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Quiescent galaxies in a virialized cluster at redshift 2
T2 - evidence for accelerated size growth
AU - Noordeh, E.
AU - Canning, R. E. A.
AU - Willis, J. P.
AU - Allen, S. W.
AU - Mantz, A.
AU - Stanford, S. A.
AU - Brammer, G.
PY - 2021/11
Y1 - 2021/11
N2 - We present an analysis of the galaxy population in XLSSC 122, an X-ray-selected, virialized cluster at redshift z = 1.98. We utilize Hubble Space Telescope (HST)Wide Field Camera 3 (WFC3) photometry to characterize the activity and morphology of spectroscopically confirmed cluster members. The quiescent fraction is found to be 88(-20)(+4) percent within 0.5r(500), significantly enhanced over the field value of 20(-2)(+2) percent at z similar to 2. We find an excess of 'bulge-like' quiescent cluster members with Sersic index n > 2 relative to the field. These galaxies are found to be larger than their field counterparts at 99.6 percent confidence, being on average 63(-24)(+31) percent larger at a fixed mass of M-* = 5 x 10(10) M-circle dot . This suggests that these cluster member galaxies have experienced an accelerated size evolution relative to the field at z > 2. We discuss minor mergers as a possible mechanism underlying this disproportionate size growth.
AB - We present an analysis of the galaxy population in XLSSC 122, an X-ray-selected, virialized cluster at redshift z = 1.98. We utilize Hubble Space Telescope (HST)Wide Field Camera 3 (WFC3) photometry to characterize the activity and morphology of spectroscopically confirmed cluster members. The quiescent fraction is found to be 88(-20)(+4) percent within 0.5r(500), significantly enhanced over the field value of 20(-2)(+2) percent at z similar to 2. We find an excess of 'bulge-like' quiescent cluster members with Sersic index n > 2 relative to the field. These galaxies are found to be larger than their field counterparts at 99.6 percent confidence, being on average 63(-24)(+31) percent larger at a fixed mass of M-* = 5 x 10(10) M-circle dot . This suggests that these cluster member galaxies have experienced an accelerated size evolution relative to the field at z > 2. We discuss minor mergers as a possible mechanism underlying this disproportionate size growth.
KW - galaxies: clusters: general
KW - galaxies: evolution
KW - galaxies: fundamental parameters
KW - galaxies: high-redshift
KW - galaxies: stellar content
KW - galaxies: structure
KW - SIMILAR-TO 1
KW - COLOR-MAGNITUDE RELATION
KW - STAR-FORMATION
KW - STELLAR-MASS
KW - SPIRAL GALAXIES
KW - DISK GALAXIES
KW - EVOLUTION
KW - FIELD
KW - MERGERS
KW - TRANSFORMATION
U2 - 10.1093/mnras/stab2459
DO - 10.1093/mnras/stab2459
M3 - Journal article
VL - 507
SP - 5272
EP - 5280
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 281983872