Extremely compact massive galaxies at z ∼ 1.4

被引：219
作者：
Trujillo, I.
Feulner, G.
Goranova, Y.
Hopp, U.
Longhetti, M.
Saracco, P.
Bender, R.
Braito, V.
Della Ceca, R.
Drory, N.
Mannucci, F.
Severgnini, P.
机构：
[1] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
[2] Univ Sternwarte Munchen, D-81679 Munich, Germany
[3] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[4] Potsdam Inst Klimafolgenforsch, D-14412 Potsdam, Germany
[5] Osserv Astron Brera, INAF, I-20121 Milan, Italy
[6] NASA, Goddard Space Flight Ctr, Explorat Universe Div, Greenbelt, MD 20771 USA
[7] Univ Texas, Austin, TX 78712 USA
[8] CNR, Ist Radioastron, I-50125 Florence, Italy
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2006年 / 373卷 / 01期
关键词：
galaxies : elliptical and lenticular; cD; galaxies : evolution; galaxies : formation; galaxies : fundamental parameters; galaxies : high-redshift; galaxies : structure;
D O I：
10.1111/j.1745-3933.2006.00238.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The optical rest-frame sizes of 10 of the most massive (similar to 5 x 10(11) h(70)(-2) M circle dot) galaxies found in the near-infrared MUNICS survey at 1.2 < z < 1.7 are analysed. Sizes are estimated in both the J and K' filters. These massive galaxies are at least a factor of 4(-)(1.0)(+)(1.9) (+/- 1 alpha) smaller in the rest-frame V-band than local counterparts of the same stellar mass. Consequently, the stellar mass density of these objects is ( at least) 60 times larger than that of massive ellipticals today. Although the stellar populations of these objects are passively fading, their structural properties are rapidly changing since that redshift. This observational fact disagrees with a scenario where the more massive and passive galaxies are fully assembled at z similar to 1.4 (i.e. a monolithic scenario) and points towards a dry merger scenario as the responsible mechanism for the subsequent evolution of these galaxies.
引用
收藏
页码：L36 / L40
页数：5
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共 50 条
[11]   Passively evolving early-type galaxies at 1.4 ≲ z ≲ 2.5 in the Hubble Ultra Deep Field [J].
Daddi, E ;
Renzini, A ;
Pirzkal, N ;
Cimatti, A ;
Malhotra, S ;
Stiavelli, M ;
Xu, C ;
Pasquali, A ;
Rhoads, JE ;
Brusa, M ;
Alighieri, SD ;
Ferguson, HC ;
Koekemoer, AM ;
Moustakas, LA ;
Panagia, N ;
Windhorst, RA .
ASTROPHYSICAL JOURNAL, 2005, 626 (02) :680-697
[12]  
Daddi E, 2000, ASTRON ASTROPHYS, V362, pL45
[13]   The formation history of elliptical galaxies [J].
De Lucia, G ;
Springel, V ;
White, SDM ;
Croton, D ;
Kauffmann, G .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 366 (02) :499-509
[14]   The dissipative merger progenitors of elliptical galaxies [J].
Dekel, Avishai ;
Cox, Thomas J. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 370 (03) :1445-1453
[15]   The lack of structural and dynamical evolution of elliptical galaxies since z∼1.5:: Clues from self-consistent hydrodynamic simulations [J].
Domínguez-Tenreiro, R ;
Oñorbe, J ;
Sáiz, A ;
Artal, H ;
Serna, A .
ASTROPHYSICAL JOURNAL, 2006, 636 (02) :L77-L80
[16]   The stellar mass function of galaxies to z ∼ 5 in the FORS deep and GOODs-South Fields [J].
Drory, N ;
Salvato, M ;
Gabasch, A ;
Bender, R ;
Hopp, U ;
Feulner, G ;
Pannella, M .
ASTROPHYSICAL JOURNAL, 2005, 619 (02) :L131-L134
[17]   The Munich Near-Infrared Cluster Survey (munics).: VI.: The stellar masses of K-band-selected field galaxies to z∼1.2 [J].
Drory, N ;
Bender, R ;
Feulner, G ;
Hopp, U ;
Maraston, C ;
Snigula, J ;
Hill, GJ .
ASTROPHYSICAL JOURNAL, 2004, 608 (02) :742-751
[18]   The Munich near-infrared cluster survey - I. Field selection, object extraction and photometry [J].
Drory, N ;
Feulner, G ;
Bender, R ;
Botzler, CS ;
Hopp, U ;
Maraston, C ;
de Oliveira, CM ;
Snigula, J .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 325 (02) :550-562
[19]   EVIDENCE FROM MOTIONS OF OLD STARS THAT GALAXY COLLAPSED [J].
EGGEN, OJ ;
LYNDENBELL, D ;
SANDAGE, AR .
ASTROPHYSICAL JOURNAL, 1962, 136 (03) :748-&
[20]  
FABER SM, 2005, ASTROPH0506044
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