THE UV-MID-IR SPECTRAL ENERGY DISTRIBUTION OF A z=1.7 QUASAR HOST GALAXY

被引：20

作者：

Ross, N. R. ^{[1
]}

Assef, R. J. ^{[1
]}

Kochanek, C. S. ^{[1
,2
]}

Falco, E. ^{[3
]}

Poindexter, S. D. ^{[1
]}

机构：

[1] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[2] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA

[3] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 702卷 / 01期

关键词：

galaxies: evolution; quasars: individual (SDSS J1004+4112); SUPERMASSIVE BLACK-HOLES; GRAVITATIONALLY LENSED QUASAR; TIME-DELAY; X-RAY; COSMOLOGICAL SIMULATIONS; INFRARED LUMINOSITY; EDDINGTON RATIOS; ACTIVE GALAXIES; SDSS J1004+4112; STAR-FORMATION;

D O I：

10.1088/0004-637X/702/1/472

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the spectral energy distribution (SED) of the host galaxy of the z(s) = 1.7 gravitationally lensed quasar SDSS J1004+4112 from 0.44-8.0 mu m (0.16-3.0 mu m in the rest frame). The large angular extent of the lensed images and their separation from the central galaxy of this cluster lens allows the images to be resolved even with the Spitzer Space Telescope. Based on the SED, the host galaxy is a mixture of relatively old and intermediate age stars with an inferred stellar mass of log(M-star/M-circle dot) = 11.09 +/- 0.28 and a star-formation rate of log((M) over dot/M-circle dot yr(-1)) = 1.21 +/- 0.26. Given the estimated black hole mass of M-BH similar or equal to 10(8.6) M-circle dot from locally calibrated correlations of black hole masses with line widths and luminosities, the black hole represents a fraction log(M-BH/M-star) = - 2.49 +/- 0.28 of the stellar mass and it is radiating at 0.24 +/- 0.05 of the Eddington limit. The ratio of the host stellar mass to the black hole mass is only marginally consistent with the locally observed ratio.

引用

页码：472 / 479

页数：8

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