Detecting high-redshift evolved galaxies as the hosts of optically faint hard X-ray sources

被引：36

作者：

Cowie, LL

Barger, AJ

Bautz, MW

Capak, P

Crawford, CS

Fabian, AC

Hu, EM

Iwamuro, F

Kneib, JP

Maihara, T

Motohara, K

机构：

[1] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

[2] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

[3] MIT, Ctr Space Res, Cambridge, MA 02139 USA

[4] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[5] Kyoto Univ, Fac Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

[6] Observ Midi Pyrenees, F-31400 Toulouse, France

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 551卷 / 01期

关键词：

cosmology : observations; galaxies : active; galaxies : distances and redshifts galaxies : evolution; galaxies : formation; galaxies : starburst;

D O I：

10.1086/319839

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We combine deep Subaru near-infrared images of the massive lensing clusters A2390 and A370 with Keck optical data to map the spectral energy distributions (SEDs) of Chandra X-ray sources lying behind the clusters. The three sources behind A2390 are found to have extremely red colors with SEDs consistent with evolved galaxies at redshifts z > 1.4. One source has extremely anomalous colors, which we interpret as evidence for a type Sa SED at a redshift around 2.5. The photometric redshift of another source has been confirmed at z = 1.467 from near-infrared spectroscopy using the Cooled Infrared Spectrograph and Camera for OHS on Subaru. Mapping of optically faint hard X-ray sources may prove to be an extremely efficient way to locate luminous evolved galaxies at high redshifts.

引用

页码：L9 / L12

页数：4

共 21 条

[1]

ALTIERI B, 1999, A A, V343, P665

[2]

[Anonymous], JCMT UKIRT NEWSLETTE

[3] The nature of the hard X-ray background sources: Optical, near-infrared, submillimeter, and radio properties [J].