THE EXTRAORDINARY MID-INFRARED SPECTRAL PROPERTIES OF FeLoBAL QUASARS

被引：27

作者：

Farrah, D. ^{[1
]}

Urrutia, T. ^{[2
]}

Lacy, M. ^{[3
]}

Lebouteiller, V. ^{[4
]}

Spoon, H. W. W. ^{[4
]}

Bernard-Salas, J. ^{[4
]}

Connolly, N. ^{[5
]}

Afonso, J. ^{[6
,7
]}

Connolly, B. ^{[8
]}

Houck, J. ^{[4
]}

机构：

[1] Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England

[2] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA

[3] Natl Radio Astron Observ, Charlottesville, VA USA

[4] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[5] Hamilton Coll, Dept Phys, Clinton, NY 13323 USA

[6] Univ Lisbon, Fac Ciencias, Observ Astron Lisboa, P-1349018 Lisbon, Portugal

[7] Univ Lisbon, Ctr Astron & Astrofis, P-1349018 Lisbon, Portugal

[8] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 717卷 / 02期

基金：

美国国家科学基金会;

关键词：

galaxies: active; galaxies: evolution; infrared: galaxies; quasars: absorption lines; BROAD ABSORPTION-LINE; ULTRALUMINOUS INFRARED GALAXIES; ACTIVE GALACTIC NUCLEI; SPITZER-SPACE-TELESCOPE; STAR-FORMING GALAXIES; X-RAY; SUBMILLIMETER GALAXIES; BLACK-HOLES; LUMINOSITY FUNCTIONS; VELOCITY DISPERSION;

D O I：

10.1088/0004-637X/717/2/868

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present mid-infrared (mid-IR) spectra of six FeLoBAL quasi-stellar objects (QSOs) at 1 < z < 1.8, taken with the Spitzer Space Telescope. The spectra span a range of shapes, from hot dust-dominated active galactic nuclei (AGNs) with silicate emission at 9.7 mu m to moderately obscured starbursts with strong polycyclic aromatic hydrocarbon (PAH) emission. The spectrum of one object, SDSS 1214-0001, shows the most prominent PAHs yet seen in any QSO at any redshift, implying that the starburst dominates the mid-IR emission with an associated star formation rate on the order of 2700 M-circle dot yr(-1). With the caveats that our sample is small and not robustly selected, we combine our mid-IR spectral diagnostics with previous observations to propose that FeLoBAL QSOs are at least largely comprised of systems in which (1) a merger-driven starburst is ending, (2) a luminous AGN is in the last stages of burning through its surrounding dust, and (3) we may be viewing over a restricted line-of-sight range.

引用

页码：868 / 877

页数：10

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