TY - JOUR
T1 - Evolution of Elliptical Galaxies at z ≳ 1 Revealed from a Large, Multicolor Sample of Extremely Red Objects
AU - Miyazaki, Masayuki
AU - Shimasaku, Kazuhiro
AU - Kodama, Tadayuki
AU - Okamura, Sadanori
AU - Furusawa, Hisanori
AU - Ouchi, Masami
AU - Nakata, Fumiaki
AU - Doi, Mamoru
AU - Hamabe, Masaru
AU - Kimura, Masahiko
AU - Komiyama, Yutaka
AU - Miyazaki, Satoshi
AU - Nagashima, Chie
AU - Nagata, Tetsuya
AU - Nagayama, Takahiro
AU - Nakajima, Yasushi
AU - Nakaya, Hidehiko
AU - Pickles, Andrew J.
AU - Sato, Shuji
AU - Sekiguchi, Kazuhiro
AU - Sekiguchi, Maki
AU - Sugitani, Koji
AU - Takata, Tadafumi
AU - Tamura, Motohide
AU - Yagi, Masafumi
AU - Yasuda, Naoki
PY - 2003/1/1
Y1 - 2003/1/1
N2 - We studied the evolution of elliptical galaxies at z ≳ 1 using a sample of 247 Extremely Red Objects (EROs) with R - Ks ≥ 3.35 (AB) and Ks ≤ 22.1 (AB) constructed from B V R i′ z′ J H Ks multicolor data of a 114 arcmin2 area in the Subaru/XMM-Newton Deep Field taken with the Subaru Telescope and the UH 2.2 m telescope. By fitting template spectra of old galaxies (OGs) and young, dusty starbursts (DSs) to the multicolor data, we classified EROs into these two classes and estimated their redshifts. We found that 58% of the EROs in our sample belong to the OG class and that these OGs have a wide range of colors at any redshift. We derived rest-frame B-band luminosity functions of OGs in our sample at z = 1-1.5 and 1.5-2.5, and found that the number density of galaxies obeying passive evolution drops at z ≳ 1.5 by a factor of three or more. The spatial correlation length of OGs is estimated to be r0 ≳ 8 h-1 Mpc, which is comparable to, or larger than, those of present-day early-type galaxies of similar luminosities. We also discussed properties of DSs in our data.
AB - We studied the evolution of elliptical galaxies at z ≳ 1 using a sample of 247 Extremely Red Objects (EROs) with R - Ks ≥ 3.35 (AB) and Ks ≤ 22.1 (AB) constructed from B V R i′ z′ J H Ks multicolor data of a 114 arcmin2 area in the Subaru/XMM-Newton Deep Field taken with the Subaru Telescope and the UH 2.2 m telescope. By fitting template spectra of old galaxies (OGs) and young, dusty starbursts (DSs) to the multicolor data, we classified EROs into these two classes and estimated their redshifts. We found that 58% of the EROs in our sample belong to the OG class and that these OGs have a wide range of colors at any redshift. We derived rest-frame B-band luminosity functions of OGs in our sample at z = 1-1.5 and 1.5-2.5, and found that the number density of galaxies obeying passive evolution drops at z ≳ 1.5 by a factor of three or more. The spatial correlation length of OGs is estimated to be r0 ≳ 8 h-1 Mpc, which is comparable to, or larger than, those of present-day early-type galaxies of similar luminosities. We also discussed properties of DSs in our data.
KW - Galaxies: elliptical and lenticular, cD
KW - Galaxies: evolution
KW - Galaxies: photometry
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U2 - 10.1093/pasj/55.6.1079
DO - 10.1093/pasj/55.6.1079
M3 - Article
AN - SCOPUS:1442352571
VL - 55
SP - 1079
EP - 1103
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
SN - 0004-6264
IS - 6
ER -