THE QUASAR SDSS J1536+0441: AN UNUSUAL DOUBLE-PEAKED EMITTER

被引：33

作者：

Chornock, R. ^{[1
]}

Bloom, J. S. ^{[1
]}

Cenko, S. B. ^{[1
]}

Filippenko, A. V. ^{[1
]}

Silverman, J. M. ^{[1
]}

Hicks, M. D. ^{[2
]}

Lawrence, K. J. ^{[2
]}

Mendez, A. J. ^{[3
,4
]}

Rafelski, M. ^{[3
,4
]}

Wolfe, A. M. ^{[3
,4
]}

机构：

[1] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[3] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[4] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 709卷 / 01期

基金：

美国国家科学基金会;

关键词：

accretion; accretion disks; quasars: individual (SDSS J153636.22+044127.0); ACTIVE GALACTIC NUCLEI; BLACK-HOLE SYSTEM; BROAD-LINE REGION; EMISSION-LINES; TELESCOPE; J153636.22+044127.0; SPECTROGRAPH; ARP-102B; DISK;

D O I：

10.1088/2041-8205/709/1/L39

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The quasar SDSS J153636.22+044127.0, exhibiting peculiar broad emission-line profiles with multiple components, was proposed as a candidate sub-parsec binary supermassive black hole system. More recently, imaging revealed two spatially distinct sources, leading some to suggest that the system was a quasar pair separated by similar to 5 kpc. We present Palomar and Keck optical spectra of this system from which we identify a third velocity component to the emission lines. We argue that the system is more likely an unusual member of the class of active galactic nuclei known as "double-peaked emitters" than a sub-parsec black hole binary or quasar pair. We find no significant velocity evolution of the two main peaks over the course of 0.95 yr, with a 3 sigma upper limit on any secular change of 70 km s(-1) yr(-1). We also find that the three velocity components of the emission lines are spatially coincident to within 0 ''.015 along the slit, apparently ruling out the double-quasar hypothesis.

引用

页码：L39 / L43

页数：5

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